Danica Goles | University of Novi Sad (original) (raw)
Papers by Danica Goles
Zbornik radova Građevinskog fakulteta, 2014
Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing, 2013
Advances in Engineering Software
This paper discusses the cloud computing based approach for parallelization of large displacement... more This paper discusses the cloud computing based approach for parallelization of large displacement stability analysis of orthotropic prismatic shell structures with simply supported boundary conditions along the diaphragm-supported edges. We review the harmonic coupled finite strip method (HCFSM), and describe a software system for nonlinear analysis of reinforced concrete (RC) structures. We combine different parallelization models – MPI and OpenMP – in order to cope with the increased computational complexity, which originates from coupling of all series terms in the HCFSM formulation. We discuss the effects of parallelization from the perspective of a cloud environment. Our results show that rational usage of cloud resources can lead to significant performance improvements and monetary savings. In certain cases, the achieved performance can be very close to the maximum one.
Zbornik radova Građevinskog fakulteta, 2014
Design of precast concrete industrial building is a complex iterative procedure by which, from a ... more Design of precast concrete industrial building is a complex iterative procedure by which, from a set of known possible solutions, is found the one, that in optimal way meets the set requirements and limitations. By proper selection of the disposition of the building, number of possible solutions is reduced at an early stage of design. This paper presents the main requirements and limitations faced by the structure of precast concrete industrial building, as well as parameters that can be defined in dispositional solution: dimensions, orientation and position of the object, materials, structural system, geometric characteristics, foundation system, the way of decomposition of the structure to prefabricated elements, their bearings and connections, and others. Special emphasis is given to the proper selection of the parameters of disposition in function of set requirements and constraints. The work is intended for graduates and young engineers, to help them to properly systematize and apply the knowledge gained during education, and select the optimal dispositional solution the exact way.
Zbornik radova Građevinskog fakulteta, 2014
Zbornik radova Građevinskog fakulteta, 2014
Zbornik radova Građevinskog fakulteta, 2013
Gradevinar
Stability analysis of prismatic reinforced concrete shells is presented in the paper. These struc... more Stability analysis of prismatic reinforced concrete shells is presented in the paper. These structures are special shells for which both geometry and material properties can be considered as constant along the main direction, while only the loading distribution may vary. A semi-analytical harmonic coupled finite strip method (HCFSM) is used to solve the large deflection and post-buckling problems, or both actions simultaneously. This is particularly important for shells having large span-to-width ratios.
A study of fatigue damage characterization for timedependent deformations of material of rod stru... more A study of fatigue damage characterization for timedependent deformations of material of rod structures under step cyclic constant amplitudes loading is here presented. The damage detection algorithm was formulated from a single RDA system, which has already been derived from special limits of the continuum model using the principle of analogy. A steel rod has been modelled according to the RDA model, with some physical calibration and used as a prototype in the research for years. The RDA modelling technique reduces material nonlinear problems to linear dynamic problems, which allows the possibility of using the modal analysis. For damped structures, the determination of damping matrix or modal damping coefficient is most important. Therefore, this paper proposes a modification which can be simply integrated in the extant modal analysis algorithms and refers to the procedure of calculating damping coefficients for the various parts of a discretised structure. As demonstrated in the...
Advances in Engineering Software
This paper discusses the cloud computing based approach for parallelization of large displacement... more This paper discusses the cloud computing based approach for parallelization of large displacement stability analysis of orthotropic prismatic shell structures with simply supported boundary conditions along the diaphragm-supported edges. We review the harmonic coupled finite strip method (HCFSM), and describe a software system for nonlinear analysis of reinforced concrete (RC) structures. We combine different parallelization models – MPI and OpenMP – in order to cope with the increased computational complexity, which originates from coupling of all series terms in the HCFSM formulation. We discuss the effects of parallelization from the perspective of a cloud environment. Our results show that rational usage of cloud resources can lead to significant performance improvements and monetary savings. In certain cases, the achieved performance can be very close to the maximum one.
Periodica Polytechnica Civil Engineering, 2014
This paper presents theoretical and numerical analysis of two reinforced concrete folded plate st... more This paper presents theoretical and numerical analysis of two reinforced concrete folded plate structures (RCFPS) of span length 20 and 30 m, according to linear predictions and predictions of geometric nonlinear behavior of structure. Characteristic cross-sections are designed on the basics of internal forces calculated using linear finite strip method (FSM). The ultimate resistance of characteristic cross-sections is presented through diagrams of interaction. It was found that the safety factors of selected cross sections calculated assuming linear structural behavior in almost all the cases are on the safe side in relation to the results obtained assuming large displacements. Significant differences between the results of linear and nonlinear theory are observed only at longer RCFPS. The stability analysis required during the design process is performed by using the complex harmonic coupled finite strip method (HCFSM). A combined application of MPI and OpenMP parallelization methods in the cloud computing environment is used.
Zbornik radova Građevinskog fakulteta, 2013
Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing, 2013
Proceedings of the Eleventh International Conference on Computational Structures Technology, 2012
Currently the finite-element method (FEM) is considered as the most promising analysis tool among... more Currently the finite-element method (FEM) is considered as the most promising analysis tool among the existing methods of analysis which are usually based on the continuum mechanics approach, but accuracy of the FEM solutions for nonlinear problems of solid mechanics can be hardly guaranteed and the computing cost is still prohibitive. To overcome such a drawback of the nonlinear FEM including their application to reinforced concrete folded plate structures, this paper presents the application of the harmonic coupled finite-strip method (HCFSM) to structure stability analysis. The theoretical stress-strain relations of various concrete strength classes and reinforcement, knowing only the minimum number of mechanical material parameters that come from standard test procedures, are determined from the rheological-dynamical analogy (RDA). As an illustrative example, a feasible reinforced concrete folded plate structure is analysed in detail. The ultimate resistance of two characteristic cross sections of a folded plate structure is calculated using working diagrams of concrete and steel according to Eurocode 2 and according to the RDA. Diagrams of interaction N u -M u are drawn for several combinations of material working diagrams and are mutually compared.
Facta universitatis - series: Architecture and Civil Engineering, 2012
ABSTRACT The optimal design of reinforced concrete folded plate structures under multiple loading... more ABSTRACT The optimal design of reinforced concrete folded plate structures under multiple loading conditions is presented. The design variables include geometrical quantities, like the thickness, dimensions of the structural members (plates), and topological parameters, which define the locations and the connectivity of such elements. The structural analysis required during the design process is performed by using the classical finite strip method and complex harmonic coupled finite strip method for the solution of the corresponding geometric non-linear design problem. Some applications to the optimal design of prismatic folded plates show the effectiveness of the proposed procedures.
Zbornik radova Građevinskog fakulteta, 2014
Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing, 2013
Advances in Engineering Software
This paper discusses the cloud computing based approach for parallelization of large displacement... more This paper discusses the cloud computing based approach for parallelization of large displacement stability analysis of orthotropic prismatic shell structures with simply supported boundary conditions along the diaphragm-supported edges. We review the harmonic coupled finite strip method (HCFSM), and describe a software system for nonlinear analysis of reinforced concrete (RC) structures. We combine different parallelization models – MPI and OpenMP – in order to cope with the increased computational complexity, which originates from coupling of all series terms in the HCFSM formulation. We discuss the effects of parallelization from the perspective of a cloud environment. Our results show that rational usage of cloud resources can lead to significant performance improvements and monetary savings. In certain cases, the achieved performance can be very close to the maximum one.
Zbornik radova Građevinskog fakulteta, 2014
Design of precast concrete industrial building is a complex iterative procedure by which, from a ... more Design of precast concrete industrial building is a complex iterative procedure by which, from a set of known possible solutions, is found the one, that in optimal way meets the set requirements and limitations. By proper selection of the disposition of the building, number of possible solutions is reduced at an early stage of design. This paper presents the main requirements and limitations faced by the structure of precast concrete industrial building, as well as parameters that can be defined in dispositional solution: dimensions, orientation and position of the object, materials, structural system, geometric characteristics, foundation system, the way of decomposition of the structure to prefabricated elements, their bearings and connections, and others. Special emphasis is given to the proper selection of the parameters of disposition in function of set requirements and constraints. The work is intended for graduates and young engineers, to help them to properly systematize and apply the knowledge gained during education, and select the optimal dispositional solution the exact way.
Zbornik radova Građevinskog fakulteta, 2014
Zbornik radova Građevinskog fakulteta, 2014
Zbornik radova Građevinskog fakulteta, 2013
Gradevinar
Stability analysis of prismatic reinforced concrete shells is presented in the paper. These struc... more Stability analysis of prismatic reinforced concrete shells is presented in the paper. These structures are special shells for which both geometry and material properties can be considered as constant along the main direction, while only the loading distribution may vary. A semi-analytical harmonic coupled finite strip method (HCFSM) is used to solve the large deflection and post-buckling problems, or both actions simultaneously. This is particularly important for shells having large span-to-width ratios.
A study of fatigue damage characterization for timedependent deformations of material of rod stru... more A study of fatigue damage characterization for timedependent deformations of material of rod structures under step cyclic constant amplitudes loading is here presented. The damage detection algorithm was formulated from a single RDA system, which has already been derived from special limits of the continuum model using the principle of analogy. A steel rod has been modelled according to the RDA model, with some physical calibration and used as a prototype in the research for years. The RDA modelling technique reduces material nonlinear problems to linear dynamic problems, which allows the possibility of using the modal analysis. For damped structures, the determination of damping matrix or modal damping coefficient is most important. Therefore, this paper proposes a modification which can be simply integrated in the extant modal analysis algorithms and refers to the procedure of calculating damping coefficients for the various parts of a discretised structure. As demonstrated in the...
Advances in Engineering Software
This paper discusses the cloud computing based approach for parallelization of large displacement... more This paper discusses the cloud computing based approach for parallelization of large displacement stability analysis of orthotropic prismatic shell structures with simply supported boundary conditions along the diaphragm-supported edges. We review the harmonic coupled finite strip method (HCFSM), and describe a software system for nonlinear analysis of reinforced concrete (RC) structures. We combine different parallelization models – MPI and OpenMP – in order to cope with the increased computational complexity, which originates from coupling of all series terms in the HCFSM formulation. We discuss the effects of parallelization from the perspective of a cloud environment. Our results show that rational usage of cloud resources can lead to significant performance improvements and monetary savings. In certain cases, the achieved performance can be very close to the maximum one.
Periodica Polytechnica Civil Engineering, 2014
This paper presents theoretical and numerical analysis of two reinforced concrete folded plate st... more This paper presents theoretical and numerical analysis of two reinforced concrete folded plate structures (RCFPS) of span length 20 and 30 m, according to linear predictions and predictions of geometric nonlinear behavior of structure. Characteristic cross-sections are designed on the basics of internal forces calculated using linear finite strip method (FSM). The ultimate resistance of characteristic cross-sections is presented through diagrams of interaction. It was found that the safety factors of selected cross sections calculated assuming linear structural behavior in almost all the cases are on the safe side in relation to the results obtained assuming large displacements. Significant differences between the results of linear and nonlinear theory are observed only at longer RCFPS. The stability analysis required during the design process is performed by using the complex harmonic coupled finite strip method (HCFSM). A combined application of MPI and OpenMP parallelization methods in the cloud computing environment is used.
Zbornik radova Građevinskog fakulteta, 2013
Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing, 2013
Proceedings of the Eleventh International Conference on Computational Structures Technology, 2012
Currently the finite-element method (FEM) is considered as the most promising analysis tool among... more Currently the finite-element method (FEM) is considered as the most promising analysis tool among the existing methods of analysis which are usually based on the continuum mechanics approach, but accuracy of the FEM solutions for nonlinear problems of solid mechanics can be hardly guaranteed and the computing cost is still prohibitive. To overcome such a drawback of the nonlinear FEM including their application to reinforced concrete folded plate structures, this paper presents the application of the harmonic coupled finite-strip method (HCFSM) to structure stability analysis. The theoretical stress-strain relations of various concrete strength classes and reinforcement, knowing only the minimum number of mechanical material parameters that come from standard test procedures, are determined from the rheological-dynamical analogy (RDA). As an illustrative example, a feasible reinforced concrete folded plate structure is analysed in detail. The ultimate resistance of two characteristic cross sections of a folded plate structure is calculated using working diagrams of concrete and steel according to Eurocode 2 and according to the RDA. Diagrams of interaction N u -M u are drawn for several combinations of material working diagrams and are mutually compared.
Facta universitatis - series: Architecture and Civil Engineering, 2012
ABSTRACT The optimal design of reinforced concrete folded plate structures under multiple loading... more ABSTRACT The optimal design of reinforced concrete folded plate structures under multiple loading conditions is presented. The design variables include geometrical quantities, like the thickness, dimensions of the structural members (plates), and topological parameters, which define the locations and the connectivity of such elements. The structural analysis required during the design process is performed by using the classical finite strip method and complex harmonic coupled finite strip method for the solution of the corresponding geometric non-linear design problem. Some applications to the optimal design of prismatic folded plates show the effectiveness of the proposed procedures.