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Papers by Andrzej Ambroziak

Research paper thumbnail of Membrane-Hanging Roof Analysis: An Example

The paper presents an analysis of a membrane-hanging roof subjected to climatic loadings. Discuss... more The paper presents an analysis of a membrane-hanging roof subjected to climatic loadings. Discussion of the fundamental equations of the dense net model, used to describe the behaviour of coated woven fabric, and the concept of the climatic loadings is included.

Research paper thumbnail of Mechanical Properties of Polyester Coated Fabric Subjected to Biaxial Loading

Journal of Materials in Civil Engineering, 2015

Research paper thumbnail of Mechanical properties of Precontraint 1202S coated fabric under biaxial tensile test with different load ratios

Construction and Building Materials, 2015

Research paper thumbnail of Application of the murnaghan model in analysis of non-linear elastic material properties of pvc-coated fabric

Research paper thumbnail of Numerical Modeling of Elasto-Viscoplastic Chaboche Constitutive Equations Using MSC.MARC

Research paper thumbnail of Numerical modelling of elasto-viscoplastic Bodner-Partom constitutive equations

Research paper thumbnail of Mechanical Properties of Polyester Coated Fabric Subjected to Biaxial Loading

Journal of Materials in Civil Engineering

The paper is focused on the comparison between uniaxial and biaxial laboratory test results for t... more The paper is focused on the comparison between uniaxial and biaxial laboratory test results for the polyester coated fabric. A short literature review concerning coated woven fabrics with emphasis on biaxial tensile tests is presented. A description of the polyester coated fabric under biaxial test by means of constitutive models and material parameter values is proposed. To establish the right values of the ultimate tensile strength flat and curved grips are tested.

Research paper thumbnail of Analysis of Non-Linear Elastic Material Properties of PVC-Coated Panama Fabric

The aim of the present paper is to propose a method of laboratory tests to determine non-linear e... more The aim of the present paper is to propose a method of laboratory tests to determine non-linear elastic properties of coated Panama fabric. The material parameters are specified on the basis of uniaxial tensile tests in the warp and weft directions. Techniques based on the least squares' methods are used in the determination process. Reduction concepts of the strength parameters are proposed in order to take into account rheological effects in the fabric. Numerical applications to MSC.Marc, a commercial program, are presented. A user-defined HOOKLW subroutine is used to introduce the non-linear elastic properties of the PVC-coated fabric into the MSC.Marc system.

Research paper thumbnail of Implementation of continuum damage in elasto-viscoplastic constitutive equations

Research paper thumbnail of On Aspects of Urban Areas Rehabilitation

Research paper thumbnail of On Sustainable Development and Renewal of Urban Areas

Research paper thumbnail of On the Rehabilitation of Steel Constructions

Research paper thumbnail of Simulation of Wind Loading Action on Hanging Structures Literature Survey

Research paper thumbnail of The elasto-viscoplastic Chaboche model

Research paper thumbnail of On Aspects of Tensile Structures Analysis

Research paper thumbnail of A Four-Node 3D Isoparametric Membrane Element

Research paper thumbnail of Technical Fabrics in Construction of Large Scale Roofs -Numerical and Experimental Aspects

Designing and construction of textile hanging roofs is the challenging subject for engineers. Thi... more Designing and construction of textile hanging roofs is the challenging subject for engineers. This type of structure needs geometrically and very often also physically non-linear calculations. Due to different behaviour of two families of threads (warp and weft), which during deformation can change the angle between their directions, they require special constitutive modelling. Also the loading of hanging roofs is very special. The wind loading should be taken as the following forces, and also its distribution on the roof surface is not unique. Also the snow loading (for permanent structures) can not be usually taken according the national standard. The authors present their experiences with the finite element calculation of hanging roofs at the example of the Forest Opera open area theatre in Sopot (Poland) new designed roofing.

Research paper thumbnail of On Finite Element Modelling of Architectural Fabrics for Hanging Roofs

This paper deals with the constitutive modelling and identification of coated woven fabrics prope... more This paper deals with the constitutive modelling and identification of coated woven fabrics properties. The authors give brief characterization of the constitutive models used for the material modelling and discuss in details the fundamental equations of the dense net model. The special identification method of the non-linear elastic properties of the coated fabric is presented. The material parameters are determined on the base of uniaxial tensile tests in the warp and weft directions. For the identification process, techniques using the least squares method are applied. Additionally, the results of the uniaxial tension tests are compared with biaxial tension tests.

Research paper thumbnail of O projektowaniu konstrukcji membranowych (On membrane structures designing)

Artykuł dotyczy konstrukcji membranowych wykonanych z tkanin technicznych. Autorzy zwracają uwagę... more Artykuł dotyczy konstrukcji membranowych wykonanych z tkanin technicznych. Autorzy zwracają uwagę na procedurę wykonywania testów laboratoryjnych niezbędnych do określenia nieliniowo-sprężystych właściwości tkanin technicznych. Parametry materiałowe wyznaczane są na podstawie testów jednoosiowego rozciągania. W procesie identyfikacji wykorzystano metodę najmniejszych kwadratów. Przedstawiono wyniki identyfikacji dla czterech tkanin technicznych. Omawiany jest także proces obliczeniowy nowoprojektowanego przekrycia Opery Leśnej w Sopocie. This paper describes the membrane structures made from technical woven fabric. The authors pay attention to the method of laboratory tests necessary for identification of non-linear elastic properties of the coated membrane fabrics. The material parameters are specified on the basis of the uniaxial tensile tests in the warp and weft directions. For the identification process the techniques based on the least squares methods are used. Results of iden...

Research paper thumbnail of Autodesk ROBOT STRUCTURAL ANALYSIS PRZYKŁADY OBLICZEŃ WYMIAROWANIE KONSTRUKCJI STALOWYCH I ŻELBETOWYCH

Research paper thumbnail of Membrane-Hanging Roof Analysis: An Example

The paper presents an analysis of a membrane-hanging roof subjected to climatic loadings. Discuss... more The paper presents an analysis of a membrane-hanging roof subjected to climatic loadings. Discussion of the fundamental equations of the dense net model, used to describe the behaviour of coated woven fabric, and the concept of the climatic loadings is included.

Research paper thumbnail of Mechanical Properties of Polyester Coated Fabric Subjected to Biaxial Loading

Journal of Materials in Civil Engineering, 2015

Research paper thumbnail of Mechanical properties of Precontraint 1202S coated fabric under biaxial tensile test with different load ratios

Construction and Building Materials, 2015

Research paper thumbnail of Application of the murnaghan model in analysis of non-linear elastic material properties of pvc-coated fabric

Research paper thumbnail of Numerical Modeling of Elasto-Viscoplastic Chaboche Constitutive Equations Using MSC.MARC

Research paper thumbnail of Numerical modelling of elasto-viscoplastic Bodner-Partom constitutive equations

Research paper thumbnail of Mechanical Properties of Polyester Coated Fabric Subjected to Biaxial Loading

Journal of Materials in Civil Engineering

The paper is focused on the comparison between uniaxial and biaxial laboratory test results for t... more The paper is focused on the comparison between uniaxial and biaxial laboratory test results for the polyester coated fabric. A short literature review concerning coated woven fabrics with emphasis on biaxial tensile tests is presented. A description of the polyester coated fabric under biaxial test by means of constitutive models and material parameter values is proposed. To establish the right values of the ultimate tensile strength flat and curved grips are tested.

Research paper thumbnail of Analysis of Non-Linear Elastic Material Properties of PVC-Coated Panama Fabric

The aim of the present paper is to propose a method of laboratory tests to determine non-linear e... more The aim of the present paper is to propose a method of laboratory tests to determine non-linear elastic properties of coated Panama fabric. The material parameters are specified on the basis of uniaxial tensile tests in the warp and weft directions. Techniques based on the least squares' methods are used in the determination process. Reduction concepts of the strength parameters are proposed in order to take into account rheological effects in the fabric. Numerical applications to MSC.Marc, a commercial program, are presented. A user-defined HOOKLW subroutine is used to introduce the non-linear elastic properties of the PVC-coated fabric into the MSC.Marc system.

Research paper thumbnail of Implementation of continuum damage in elasto-viscoplastic constitutive equations

Research paper thumbnail of On Aspects of Urban Areas Rehabilitation

Research paper thumbnail of On Sustainable Development and Renewal of Urban Areas

Research paper thumbnail of On the Rehabilitation of Steel Constructions

Research paper thumbnail of Simulation of Wind Loading Action on Hanging Structures Literature Survey

Research paper thumbnail of The elasto-viscoplastic Chaboche model

Research paper thumbnail of On Aspects of Tensile Structures Analysis

Research paper thumbnail of A Four-Node 3D Isoparametric Membrane Element

Research paper thumbnail of Technical Fabrics in Construction of Large Scale Roofs -Numerical and Experimental Aspects

Designing and construction of textile hanging roofs is the challenging subject for engineers. Thi... more Designing and construction of textile hanging roofs is the challenging subject for engineers. This type of structure needs geometrically and very often also physically non-linear calculations. Due to different behaviour of two families of threads (warp and weft), which during deformation can change the angle between their directions, they require special constitutive modelling. Also the loading of hanging roofs is very special. The wind loading should be taken as the following forces, and also its distribution on the roof surface is not unique. Also the snow loading (for permanent structures) can not be usually taken according the national standard. The authors present their experiences with the finite element calculation of hanging roofs at the example of the Forest Opera open area theatre in Sopot (Poland) new designed roofing.

Research paper thumbnail of On Finite Element Modelling of Architectural Fabrics for Hanging Roofs

This paper deals with the constitutive modelling and identification of coated woven fabrics prope... more This paper deals with the constitutive modelling and identification of coated woven fabrics properties. The authors give brief characterization of the constitutive models used for the material modelling and discuss in details the fundamental equations of the dense net model. The special identification method of the non-linear elastic properties of the coated fabric is presented. The material parameters are determined on the base of uniaxial tensile tests in the warp and weft directions. For the identification process, techniques using the least squares method are applied. Additionally, the results of the uniaxial tension tests are compared with biaxial tension tests.

Research paper thumbnail of O projektowaniu konstrukcji membranowych (On membrane structures designing)

Artykuł dotyczy konstrukcji membranowych wykonanych z tkanin technicznych. Autorzy zwracają uwagę... more Artykuł dotyczy konstrukcji membranowych wykonanych z tkanin technicznych. Autorzy zwracają uwagę na procedurę wykonywania testów laboratoryjnych niezbędnych do określenia nieliniowo-sprężystych właściwości tkanin technicznych. Parametry materiałowe wyznaczane są na podstawie testów jednoosiowego rozciągania. W procesie identyfikacji wykorzystano metodę najmniejszych kwadratów. Przedstawiono wyniki identyfikacji dla czterech tkanin technicznych. Omawiany jest także proces obliczeniowy nowoprojektowanego przekrycia Opery Leśnej w Sopocie. This paper describes the membrane structures made from technical woven fabric. The authors pay attention to the method of laboratory tests necessary for identification of non-linear elastic properties of the coated membrane fabrics. The material parameters are specified on the basis of the uniaxial tensile tests in the warp and weft directions. For the identification process the techniques based on the least squares methods are used. Results of iden...

Research paper thumbnail of Autodesk ROBOT STRUCTURAL ANALYSIS PRZYKŁADY OBLICZEŃ WYMIAROWANIE KONSTRUKCJI STALOWYCH I ŻELBETOWYCH

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