Tatjana Grigorjeva | Vilnius Gediminas Technical University (original) (raw)

Papers by Tatjana Grigorjeva

Increased deformability can be considered as the basic disadvantage of suspension bridges. One of... more Increased deformability can be considered as the basic disadvantage of suspension bridges. One of the ways to increase the rigidity of a suspension bridge is to transfer a part of stiffening girder rigidity to a suspension main cable. To give the suspension bridge more stable appearance, the authors propose to use the cables of varying bending stiffness. The main cables can be made of standard section shapes or have a composite section. The object of this work was to study a method for analyzing and determining the internal forces in the main cables and stiffening girder under static loading to provide recommendations for designing suspension bridges with stiffened cables. Simple formulas are presented for determining displacements, internal forces and stresses in the main cable and stiffening girder. Finite element modeling was performed. The final part of the paper discusses design procedures for such suspension systems. An example of a pedestrian suspension bridge is appended.Lie...

The paper presents a summary of numerical analysis on static behaviour of suspension bridges with... more The paper presents a summary of numerical analysis on static behaviour of suspension bridges with varying rigidity of cables. The primary purpose of this study was to compare suspension systems with flexible and rigid cables and to determine the influence of varying rigidity of cables on the response of bridge members under the action of uniformly distributed symmetrical and unsymmetrical static loading. The finite element analysis of a three-dimensional bridge model was performed. In the first model, the cable is modelled as TRUSS3D element, in the second model as BEAM3D element. In both models, the hangers and backstays are TRUSS3D elements and stiffening girder as BEAM3D element. It is shown that a suitable increase of main cable’s bending stiffness can effectively reduce the displacements, internal forces and stresses of suspension systems. Recommendations for appropriate stiffness are given.Lietuviška santrauka. Straipsnyje pateikta tilto su skirtingo standžio lynais elgsenos s...

Mokomojoje knygoje aptariami inovatyvūs plieno tiltai, pateikiami tokių tiltų klasifikavimas ir k... more Mokomojoje knygoje aptariami inovatyvūs plieno tiltai, pateikiami tokių tiltų klasifikavimas ir konstrukcijų sandara. Pagrindinis dėmesys sutelkiamas į šiuolaikines veiksmingas kabamąsias ir kombinuotąsias plieno tiltų konstrukcijas. Apibūdinami pagrindiniai tokių plieno tiltų elgsenos ypatumai bei taikomos konstrukcinės priemonės jų deformatyvumui mažinti. Pateikiami lanksčialynių ir standžialynių kabamųjų tiltų, o taip pat paspyrinių bei kombinuotųjų plieno tiltų skaičiavimo metodai. Aptariami tokių tiltų laikančiųjų konstrukcijų įrąžų reguliavimas bei racionalių parametrų parinkimas. Mokomoji knyga skirta Statybos inžinerijos studijų krypties antrosios pakopos studentams. Ji taip pat galėtų būti pagalbine priemone plieno tiltų konstruktoriams. Leidinys parengtas ir išleistas už Europos struktūrinių fondų lėšas, jomis finansuojant VGTU Statybos fakulteto projektą „Transporto ir civilinės inžinerijos sektorių mokslo, verslo ir studijų integralumo didinimas (TRANCI V)“, VP1-2.2-ŠMM ...

Modelling of cable kinematic displacements is performed by FE, proposed by authors analytical and... more Modelling of cable kinematic displacements is performed by FE, proposed by authors analytical and engi-neering methods. The proposed analytical and FE methods results fit sufficiently well, when engineering methods yield significant errors.

Procedia Engineering, 2013

The main disadvantage of suspension bridges is their increased deformability. One of the ways of ... more The main disadvantage of suspension bridges is their increased deformability. One of the ways of suspension systems stabilization is giving certain bending stiffness to the suspension cables. This paper presents a revised theoretical and numerical analysis of the suspension bridge with rigid cable. Also, taking into account the bridge erection process the revised simplified method for the stress-strain analysis of suspension bridge with rigid cables is presented. Comparison of theoretical and numerical results is given.

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, a... more JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact

Leidinyje pateikiami viešosios paskirties pastato kompleksinio projekto konstrukcinės dalies reng... more Leidinyje pateikiami viešosios paskirties pastato kompleksinio projekto konstrukcinės dalies rengimo metodikos nurodymai. Aptarti pagrindinės sistemos parinkimas, konstrukcijos skaičiuojamojo modelio sukūrimas, apkrovų ir poveikių skaičiavimas, jų derinių sudarymas. Aprašytas pastato laikančiųjų konstrukcijų skaičiavimas ir projektavimas, taikant kompiuterines programas. Priede yra kursinio projekto įforminimo pavyzdys. Metodikos nurodymai skirti VGTU Statybos fakulteto architektūros inžinerijos specializacijos studentams. Jie taip pat bus naudingi ir kitų statybos inžinerijos krypties specializacijų studentams

Mokslinis vadovas prof. habil. dr. Ipolitas Zenonas KAMAITIS (Vilniaus Gedimino technikos univers... more Mokslinis vadovas prof. habil. dr. Ipolitas Zenonas KAMAITIS (Vilniaus Gedimino technikos universitetas, technologijos mokslai, statybos inžinerija-02T). Disertacija ginama Vilniaus Gedimino technikos universiteto Statybos inžinerijos mokslo krypties taryboje: Pirmininkas prof. habil. dr. Gintaris KAKLAUSKAS (Vilniaus Gedimino technikos universitetas, technologijos mokslai, statybos inžinerija-02T). Nariai: prof. habil. dr. Jonas BAREIŠIS (Kauno technologijos universitetas, technologijos mokslai, mechanikos inžinerija-09T), prof. habil. dr. Audronis Kazimieras KVEDARAS (Vilniaus Gedimino technikos universitetas, technologijos mokslai, statybos inžinerija-02T), doc. dr. Žymantas RUDŽIONIS (Kauno technologijos universitetas, technologijos mokslai, statybos inžinerija-02T), prof. habil. dr. Edmundas Kazimieras ZAVADSKAS (Vilniaus Gedimino technikos universitetas, technologijos mokslai, statybos inžinerija-02T). Oponentai: doc. dr. Virgaudas PUODŽIUKAS (Lietuvos automobilių kelių direkcija prie Susisiekimo ministerijos, technologijos mokslai, statybos inžinerija-02T), doc. dr. Antanas ŠAPALAS (Vilniaus Gedimino technikos universitetas, technologijos mokslai, statybos inžinerija-02T). Disertacija bus ginama viešame Statybos inžinerijos mokslo krypties tarybos pos÷dyje 2007 m. kovo 26 d. 14 val. Vilniaus Gedimino technikos universiteto senato pos÷džių sal÷je.

Engineering Structures and Technologies, 2021

For launching a project on a structural object, the calculation of building structures stands as ... more For launching a project on a structural object, the calculation of building structures stands as one of the most important stages of project development. In order to correctly analyse structural behaviour, determine the stress-strain state and solve design or inspection problems, the designer is forced to adequately formalize the actual structure turning it into a faultless computational scheme. Virtual testing is one of the main features of the single graphical-information model. Interoperable systems for three-dimensional modelling and analysis, calculation and design ensure smooth data transfer between the physical and computational model. Modern object-modelling techniques and integrated analysis systems allow achieving the defined goal. The article deals with the forms of data exchange, the developmental features of the designed and computational (analysis) BIM model, the integrated design process of CAD/CAE as well as the conversion problems of the physical and computational m...

The suspension bridges are inherently flexible structures and in majority of cases stiffening mea... more The suspension bridges are inherently flexible structures and in majority of cases stiffening measures must be incorporated in the design. To give the suspension bridge a more stable appearance, authors proposed to use the main cables of varying bending stiffness. The rigid main cable consists of prefabricated erection segments made of standard steel profiles or have composite sections. One of the main parameter affecting the suspension bridge behaviour is the erection method for main rigid cables. Two scenarios are analysed. Simplified behaviour analysis method and FE modelling for suspension bridges with rigid cables under the action of symmetrical and asymmetrical loadings by considering two scenarios of bridge construction is presented.

Journal Business, Management and Economics Engineering, 2021

Traditional construction planning is being replaced by the building information modelling (BIM) a... more Traditional construction planning is being replaced by the building information modelling (BIM) approach, which seeks to digitalise all the construction procedures, including procurement. Successful implementation of BIM on the market requires the preparation of appropriate procurement documents. Purpose – to suggest the most suitable set of documents for public procurement in the context of BIM by analysing the documents that are necessary for implementing the stages of the building life cycle. Research methodology – in order to achieve the aim of the research, the in-depth analysis of different countries’ procurement methodological documents and analysis of the scientific articles have been implemented. The methodology also includes expert interviewing, which was done in order to analyse the investigated standards. Findings – After analysing the procurement procedures of Norway, Spain, France, Poland, the United Kingdom, the Netherlands, and Finland, a set of documents, including ...

Baltic Journal of Road and Bridge Engineering, 2006

The basic disadvantage of suspension bridges can be considered their increased deformability. One... more The basic disadvantage of suspension bridges can be considered their increased deformability. One of the ways to increase the rigidity of a suspension bridge is to transfer a part of stiffening girder rigidity to a suspension cable. A rigid cable better resists the imposed symmetrical and asymmetrical loads and displacements and retains its original geometric form. This paper presents a theoretical investigation of the suspension bridge with the rigid cable. Also, taking into account the geometrical non-linearity of rigid cable behaviour, a simplified analysis method for determination of forces and displacements in stiffening girder and cable of suspension bridge was developed.

Engineering Structures and Technologies

Suspension bridges are characterized by exceptional architectural expressions and excellent techn... more Suspension bridges are characterized by exceptional architectural expressions and excellent technical and economic properties. However, despite all advantages, suspension bridges have a few negative features. Suspension bridges with flexible cables share excessive deformation caused by the displacement of kinematic origin. In order to increase the stiffness of suspension bridges, an innovative structural solution refers to rigid cables used instead of the flexible ones. The paper describes a methodology for calculating an asymmetric single-pylon suspension bridge with rigid cables considering installation features. Also, the article presents the numerical simulation of the bridge and determines the accuracy of the proposed methodology.

International Journal of Polymer Science

The present study focuses on a prediction of crack width and load-carrying capacity of flexural r... more The present study focuses on a prediction of crack width and load-carrying capacity of flexural reinforced concrete (RC) elements strengthened with fibre-reinforced polymer (FRP) reinforcements. Most studies on cracking phenomena of FRP-strengthened RC structures are directed to empirical corrections of crack-spacing formula given by design norms. Contrary to the design norms, a crack model presented in this paper is based on fracture mechanics of solids and is applied for direct calculation of flexural crack parameters. At the ultimate stage of crack propagation, the load-carrying capacity of the element is achieved; therefore, it is assumed that the load-carrying capacity can be estimated according to the ultimate crack depth (directly measuring concrete’s compressive zone height). An experimental program is presented to verify the accuracy of the proposed model, taking into account anchorage and initial strain effects. The proposed analytical crack model can be used for more prec...

Engineering Structures and Technologies

The article presents the results of the numerical analysis of the asymmetrical one-pylon suspensi... more The article presents the results of the numerical analysis of the asymmetrical one-pylon suspension bridge built-in rigid cables. The models for the suspension bridge with the cables of different rigidity are analyzed by comparing vertical displacements, bending moments and strains in the structural members of the bridge. The numerical analysis was performed by examining the bridge under symmetrical and asymmetrical loading and different erection methods. The stress-strain state of a single asymmetrical pylon with the cables of different rigidity and the rational relationship between cable rigidity and girder stiffness has been established.

The paper presents a summary of numerical analysis on static behavior of suspension bridges with ... more The paper presents a summary of numerical analysis on static behavior of suspension bridges with varying rigidity of cables. The primary purpose of this study was to compare suspension systems with flexible and rigid cables and to determine the influence of varying rigidity of cables on the response of bridge members under the action of uniformly distributed symmetrical and unsymmetrical static loading. The FE analysis of a three-dimensional bridge model was performed. In the first model the cable is modeled as TRUSS3D element, in the second model as BEAM3D element. In both models the hangers and backstays are TRUSS3D elements and stiffening girder as BEAM3D element. It is shown that the displacements, internal forces and stresses of suspension systems can be effectively reduced by a suitable increasing of main cable's bending stiffness. Recommendations for appropriate stiffness are given.

Proceedings of the 2014 International Conference on Mechanics and Civil Engineering, 2014

The natural frequencies of vibration and the corresponding mode shapes of a suspension bridge wit... more The natural frequencies of vibration and the corresponding mode shapes of a suspension bridge with varying bending stiffness of cables are determined, and the changes that occur in these characteristics with respect to parametric changes in the bridge are examined. Single span L=64,0 m suspension steel footbridge with hangers and flexible cables is selected as an initial model used to study the dynamic characteristics of a suspension system. Based on FEA parameter studies are presented in which the vibration characteristics are studied as a function of structural and material parameters, such as cable flexural stiffness, modulus of elasticity and mass density of structural components. It is generally found that the main cable bending stiffness contributes a considerable effect on the natural frequencies of the suspension system.

Increased deformability can be considered as the basic disadvantage of suspension bridges. One of... more Increased deformability can be considered as the basic disadvantage of suspension bridges. One of the ways to increase the rigidity of a suspension bridge is to transfer a part of stiffening girder rigidity to a suspension main cable. To give the suspension bridge more stable appearance, the authors propose to use the cables of varying bending stiffness. The main cables can be made of standard section shapes or have a composite section. The object of this work was to study a method for analyzing and determining the internal forces in the main cables and stiffening girder under static loading to provide recommendations for designing suspension bridges with stiffened cables. Simple formulas are presented for determining displacements, internal forces and stresses in the main cable and stiffening girder. Finite element modeling was performed. The final part of the paper discusses design procedures for such suspension systems. An example of a pedestrian suspension bridge is appended.Lie...

The paper presents a summary of numerical analysis on static behaviour of suspension bridges with... more The paper presents a summary of numerical analysis on static behaviour of suspension bridges with varying rigidity of cables. The primary purpose of this study was to compare suspension systems with flexible and rigid cables and to determine the influence of varying rigidity of cables on the response of bridge members under the action of uniformly distributed symmetrical and unsymmetrical static loading. The finite element analysis of a three-dimensional bridge model was performed. In the first model, the cable is modelled as TRUSS3D element, in the second model as BEAM3D element. In both models, the hangers and backstays are TRUSS3D elements and stiffening girder as BEAM3D element. It is shown that a suitable increase of main cable’s bending stiffness can effectively reduce the displacements, internal forces and stresses of suspension systems. Recommendations for appropriate stiffness are given.Lietuviška santrauka. Straipsnyje pateikta tilto su skirtingo standžio lynais elgsenos s...

Mokomojoje knygoje aptariami inovatyvūs plieno tiltai, pateikiami tokių tiltų klasifikavimas ir k... more Mokomojoje knygoje aptariami inovatyvūs plieno tiltai, pateikiami tokių tiltų klasifikavimas ir konstrukcijų sandara. Pagrindinis dėmesys sutelkiamas į šiuolaikines veiksmingas kabamąsias ir kombinuotąsias plieno tiltų konstrukcijas. Apibūdinami pagrindiniai tokių plieno tiltų elgsenos ypatumai bei taikomos konstrukcinės priemonės jų deformatyvumui mažinti. Pateikiami lanksčialynių ir standžialynių kabamųjų tiltų, o taip pat paspyrinių bei kombinuotųjų plieno tiltų skaičiavimo metodai. Aptariami tokių tiltų laikančiųjų konstrukcijų įrąžų reguliavimas bei racionalių parametrų parinkimas. Mokomoji knyga skirta Statybos inžinerijos studijų krypties antrosios pakopos studentams. Ji taip pat galėtų būti pagalbine priemone plieno tiltų konstruktoriams. Leidinys parengtas ir išleistas už Europos struktūrinių fondų lėšas, jomis finansuojant VGTU Statybos fakulteto projektą „Transporto ir civilinės inžinerijos sektorių mokslo, verslo ir studijų integralumo didinimas (TRANCI V)“, VP1-2.2-ŠMM ...

Modelling of cable kinematic displacements is performed by FE, proposed by authors analytical and... more Modelling of cable kinematic displacements is performed by FE, proposed by authors analytical and engi-neering methods. The proposed analytical and FE methods results fit sufficiently well, when engineering methods yield significant errors.

Procedia Engineering, 2013

The main disadvantage of suspension bridges is their increased deformability. One of the ways of ... more The main disadvantage of suspension bridges is their increased deformability. One of the ways of suspension systems stabilization is giving certain bending stiffness to the suspension cables. This paper presents a revised theoretical and numerical analysis of the suspension bridge with rigid cable. Also, taking into account the bridge erection process the revised simplified method for the stress-strain analysis of suspension bridge with rigid cables is presented. Comparison of theoretical and numerical results is given.

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, a... more JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact

Leidinyje pateikiami viešosios paskirties pastato kompleksinio projekto konstrukcinės dalies reng... more Leidinyje pateikiami viešosios paskirties pastato kompleksinio projekto konstrukcinės dalies rengimo metodikos nurodymai. Aptarti pagrindinės sistemos parinkimas, konstrukcijos skaičiuojamojo modelio sukūrimas, apkrovų ir poveikių skaičiavimas, jų derinių sudarymas. Aprašytas pastato laikančiųjų konstrukcijų skaičiavimas ir projektavimas, taikant kompiuterines programas. Priede yra kursinio projekto įforminimo pavyzdys. Metodikos nurodymai skirti VGTU Statybos fakulteto architektūros inžinerijos specializacijos studentams. Jie taip pat bus naudingi ir kitų statybos inžinerijos krypties specializacijų studentams

Mokslinis vadovas prof. habil. dr. Ipolitas Zenonas KAMAITIS (Vilniaus Gedimino technikos univers... more Mokslinis vadovas prof. habil. dr. Ipolitas Zenonas KAMAITIS (Vilniaus Gedimino technikos universitetas, technologijos mokslai, statybos inžinerija-02T). Disertacija ginama Vilniaus Gedimino technikos universiteto Statybos inžinerijos mokslo krypties taryboje: Pirmininkas prof. habil. dr. Gintaris KAKLAUSKAS (Vilniaus Gedimino technikos universitetas, technologijos mokslai, statybos inžinerija-02T). Nariai: prof. habil. dr. Jonas BAREIŠIS (Kauno technologijos universitetas, technologijos mokslai, mechanikos inžinerija-09T), prof. habil. dr. Audronis Kazimieras KVEDARAS (Vilniaus Gedimino technikos universitetas, technologijos mokslai, statybos inžinerija-02T), doc. dr. Žymantas RUDŽIONIS (Kauno technologijos universitetas, technologijos mokslai, statybos inžinerija-02T), prof. habil. dr. Edmundas Kazimieras ZAVADSKAS (Vilniaus Gedimino technikos universitetas, technologijos mokslai, statybos inžinerija-02T). Oponentai: doc. dr. Virgaudas PUODŽIUKAS (Lietuvos automobilių kelių direkcija prie Susisiekimo ministerijos, technologijos mokslai, statybos inžinerija-02T), doc. dr. Antanas ŠAPALAS (Vilniaus Gedimino technikos universitetas, technologijos mokslai, statybos inžinerija-02T). Disertacija bus ginama viešame Statybos inžinerijos mokslo krypties tarybos pos÷dyje 2007 m. kovo 26 d. 14 val. Vilniaus Gedimino technikos universiteto senato pos÷džių sal÷je.

Engineering Structures and Technologies, 2021

For launching a project on a structural object, the calculation of building structures stands as ... more For launching a project on a structural object, the calculation of building structures stands as one of the most important stages of project development. In order to correctly analyse structural behaviour, determine the stress-strain state and solve design or inspection problems, the designer is forced to adequately formalize the actual structure turning it into a faultless computational scheme. Virtual testing is one of the main features of the single graphical-information model. Interoperable systems for three-dimensional modelling and analysis, calculation and design ensure smooth data transfer between the physical and computational model. Modern object-modelling techniques and integrated analysis systems allow achieving the defined goal. The article deals with the forms of data exchange, the developmental features of the designed and computational (analysis) BIM model, the integrated design process of CAD/CAE as well as the conversion problems of the physical and computational m...

The suspension bridges are inherently flexible structures and in majority of cases stiffening mea... more The suspension bridges are inherently flexible structures and in majority of cases stiffening measures must be incorporated in the design. To give the suspension bridge a more stable appearance, authors proposed to use the main cables of varying bending stiffness. The rigid main cable consists of prefabricated erection segments made of standard steel profiles or have composite sections. One of the main parameter affecting the suspension bridge behaviour is the erection method for main rigid cables. Two scenarios are analysed. Simplified behaviour analysis method and FE modelling for suspension bridges with rigid cables under the action of symmetrical and asymmetrical loadings by considering two scenarios of bridge construction is presented.

Journal Business, Management and Economics Engineering, 2021

Traditional construction planning is being replaced by the building information modelling (BIM) a... more Traditional construction planning is being replaced by the building information modelling (BIM) approach, which seeks to digitalise all the construction procedures, including procurement. Successful implementation of BIM on the market requires the preparation of appropriate procurement documents. Purpose – to suggest the most suitable set of documents for public procurement in the context of BIM by analysing the documents that are necessary for implementing the stages of the building life cycle. Research methodology – in order to achieve the aim of the research, the in-depth analysis of different countries’ procurement methodological documents and analysis of the scientific articles have been implemented. The methodology also includes expert interviewing, which was done in order to analyse the investigated standards. Findings – After analysing the procurement procedures of Norway, Spain, France, Poland, the United Kingdom, the Netherlands, and Finland, a set of documents, including ...

Baltic Journal of Road and Bridge Engineering, 2006

The basic disadvantage of suspension bridges can be considered their increased deformability. One... more The basic disadvantage of suspension bridges can be considered their increased deformability. One of the ways to increase the rigidity of a suspension bridge is to transfer a part of stiffening girder rigidity to a suspension cable. A rigid cable better resists the imposed symmetrical and asymmetrical loads and displacements and retains its original geometric form. This paper presents a theoretical investigation of the suspension bridge with the rigid cable. Also, taking into account the geometrical non-linearity of rigid cable behaviour, a simplified analysis method for determination of forces and displacements in stiffening girder and cable of suspension bridge was developed.

Engineering Structures and Technologies

Suspension bridges are characterized by exceptional architectural expressions and excellent techn... more Suspension bridges are characterized by exceptional architectural expressions and excellent technical and economic properties. However, despite all advantages, suspension bridges have a few negative features. Suspension bridges with flexible cables share excessive deformation caused by the displacement of kinematic origin. In order to increase the stiffness of suspension bridges, an innovative structural solution refers to rigid cables used instead of the flexible ones. The paper describes a methodology for calculating an asymmetric single-pylon suspension bridge with rigid cables considering installation features. Also, the article presents the numerical simulation of the bridge and determines the accuracy of the proposed methodology.

International Journal of Polymer Science

The present study focuses on a prediction of crack width and load-carrying capacity of flexural r... more The present study focuses on a prediction of crack width and load-carrying capacity of flexural reinforced concrete (RC) elements strengthened with fibre-reinforced polymer (FRP) reinforcements. Most studies on cracking phenomena of FRP-strengthened RC structures are directed to empirical corrections of crack-spacing formula given by design norms. Contrary to the design norms, a crack model presented in this paper is based on fracture mechanics of solids and is applied for direct calculation of flexural crack parameters. At the ultimate stage of crack propagation, the load-carrying capacity of the element is achieved; therefore, it is assumed that the load-carrying capacity can be estimated according to the ultimate crack depth (directly measuring concrete’s compressive zone height). An experimental program is presented to verify the accuracy of the proposed model, taking into account anchorage and initial strain effects. The proposed analytical crack model can be used for more prec...

Engineering Structures and Technologies

The article presents the results of the numerical analysis of the asymmetrical one-pylon suspensi... more The article presents the results of the numerical analysis of the asymmetrical one-pylon suspension bridge built-in rigid cables. The models for the suspension bridge with the cables of different rigidity are analyzed by comparing vertical displacements, bending moments and strains in the structural members of the bridge. The numerical analysis was performed by examining the bridge under symmetrical and asymmetrical loading and different erection methods. The stress-strain state of a single asymmetrical pylon with the cables of different rigidity and the rational relationship between cable rigidity and girder stiffness has been established.

The paper presents a summary of numerical analysis on static behavior of suspension bridges with ... more The paper presents a summary of numerical analysis on static behavior of suspension bridges with varying rigidity of cables. The primary purpose of this study was to compare suspension systems with flexible and rigid cables and to determine the influence of varying rigidity of cables on the response of bridge members under the action of uniformly distributed symmetrical and unsymmetrical static loading. The FE analysis of a three-dimensional bridge model was performed. In the first model the cable is modeled as TRUSS3D element, in the second model as BEAM3D element. In both models the hangers and backstays are TRUSS3D elements and stiffening girder as BEAM3D element. It is shown that the displacements, internal forces and stresses of suspension systems can be effectively reduced by a suitable increasing of main cable's bending stiffness. Recommendations for appropriate stiffness are given.

Proceedings of the 2014 International Conference on Mechanics and Civil Engineering, 2014

The natural frequencies of vibration and the corresponding mode shapes of a suspension bridge wit... more The natural frequencies of vibration and the corresponding mode shapes of a suspension bridge with varying bending stiffness of cables are determined, and the changes that occur in these characteristics with respect to parametric changes in the bridge are examined. Single span L=64,0 m suspension steel footbridge with hangers and flexible cables is selected as an initial model used to study the dynamic characteristics of a suspension system. Based on FEA parameter studies are presented in which the vibration characteristics are studied as a function of structural and material parameters, such as cable flexural stiffness, modulus of elasticity and mass density of structural components. It is generally found that the main cable bending stiffness contributes a considerable effect on the natural frequencies of the suspension system.