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A platform for research: civil engineering, architecture and urbanism
Design-Oriented Nonlinear Modeling of Reinforced Concrete Wall Structures for Numerical Limit State Analysis
Reinforced concrete (RC) plays a significant role in modern construction due to its versatility, durability, and low cost. As a consequence, concrete has become the world’s most-used building material, the second-most-used substance after water, and the source of more than 8% of global CO 2 emissions. Design processes for building structures of, e.g., reinforced concrete involve multiple parties, such as clients, architects, and engineers from different disciplines, often resulting in frequent changes to the design. Combined with time constraints, this requires structural engineers to adopt tools for limit state verification based not only on their accuracy but also their computational robustness and modeling complexity. As a result, limit state verification of complex RC structures is often carried out using efficient but inaccurate linear-elastic methods leading to unnecessarily conservative designs. Finite Element Limit Analysis (FELA) has emerged as an efficient and reliable alternative for ultimate limit state analysis of normally reinforced concrete structures by combining the extremum principles of plasticity with convex optimization. Since the concept does not involve finite deformations, however, it is ill-suited for assessing strain- and stiffness-based phenomena such as crack widths, reinforcement ductility, and structural instability. This thesis presents a design-oriented numerical tool with low modeling complexity for nonlinear limit state analysis of RC wall structures. Based on FELA’s high computational performance and low modeling complexity, the presented tool draws inspiration from the field by formulating the elastic field problem as a convex optimization problem using the principle of minimum complementary energy. Using this approach, the framework enables integrated collapse and deformation analysis of large-scale RC wall structures. The presented framework is based on nonlinear-elastic constitutive models for concrete and steel reinforcement, which allow the inclusion of the concrete ...
Design-Oriented Nonlinear Modeling of Reinforced Concrete Wall Structures for Numerical Limit State Analysis
Reinforced concrete (RC) plays a significant role in modern construction due to its versatility, durability, and low cost. As a consequence, concrete has become the world’s most-used building material, the second-most-used substance after water, and the source of more than 8% of global CO 2 emissions. Design processes for building structures of, e.g., reinforced concrete involve multiple parties, such as clients, architects, and engineers from different disciplines, often resulting in frequent changes to the design. Combined with time constraints, this requires structural engineers to adopt tools for limit state verification based not only on their accuracy but also their computational robustness and modeling complexity. As a result, limit state verification of complex RC structures is often carried out using efficient but inaccurate linear-elastic methods leading to unnecessarily conservative designs. Finite Element Limit Analysis (FELA) has emerged as an efficient and reliable alternative for ultimate limit state analysis of normally reinforced concrete structures by combining the extremum principles of plasticity with convex optimization. Since the concept does not involve finite deformations, however, it is ill-suited for assessing strain- and stiffness-based phenomena such as crack widths, reinforcement ductility, and structural instability. This thesis presents a design-oriented numerical tool with low modeling complexity for nonlinear limit state analysis of RC wall structures. Based on FELA’s high computational performance and low modeling complexity, the presented tool draws inspiration from the field by formulating the elastic field problem as a convex optimization problem using the principle of minimum complementary energy. Using this approach, the framework enables integrated collapse and deformation analysis of large-scale RC wall structures. The presented framework is based on nonlinear-elastic constitutive models for concrete and steel reinforcement, which allow the inclusion of the concrete ...
Design-Oriented Nonlinear Modeling of Reinforced Concrete Wall Structures for Numerical Limit State Analysis
Vestergaard, Daniel (author)
2022-01-01
Vestergaard , D 2022 , Design-Oriented Nonlinear Modeling of Reinforced Concrete Wall Structures for Numerical Limit State Analysis . DCAMM Special Report , no. S319 , Technical University of Denmark , Kgs. Lyngby . https://doi.org/10.11581/dtu.00000246
Book
Electronic Resource
English
DDC:
690
Limit State Design of reinforced concrete structures
| TIBKAT | 1974
Limit-state design of reinforced concrete
| TIBKAT | 1970