Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical simulation of crack development in reinforced concrete structures under eccentric loading
Reinforced concrete structures are generally designed to allow cracking under service loading. Since the comprehensive physical testing is sometimes cost-prohibitive, particularly for large-scale structures and structural systems, nowadays computer modeling is considered to be an attractive means for seeking more optimal designs of structural concrete components and system. Accurate modeling of crack formation and propagation at lower load levels is therefore important. In this paper, a Material Failure Process Analysis code (MFPA 2D) is used to model the crack initiation and propagation in reinforced concrete bridge pier subjected to eccentric loading. In the numerical model, the reinforced concrete is assumed to be a three-phase composite composed of concrete, reinforcement and interfaces between them. Numerically obtained results of cracking loads and global load-displacement response agree well with experimentally measured values. Notably, the model can simulate the progressive failure in a more visualized way, and MFPA 2D is proved to be an effective way for understanding the failure mechanism of the reinforced concrete structures. It has been found that the fracture of the concrete observed at the macroscopic level is predominated by tensile damage at the mesoscopic level. The authors are now developing the MFPA 3D code for the 3D modeling of the reinforced concrete structures.
Numerical simulation of crack development in reinforced concrete structures under eccentric loading
Reinforced concrete structures are generally designed to allow cracking under service loading. Since the comprehensive physical testing is sometimes cost-prohibitive, particularly for large-scale structures and structural systems, nowadays computer modeling is considered to be an attractive means for seeking more optimal designs of structural concrete components and system. Accurate modeling of crack formation and propagation at lower load levels is therefore important. In this paper, a Material Failure Process Analysis code (MFPA 2D) is used to model the crack initiation and propagation in reinforced concrete bridge pier subjected to eccentric loading. In the numerical model, the reinforced concrete is assumed to be a three-phase composite composed of concrete, reinforcement and interfaces between them. Numerically obtained results of cracking loads and global load-displacement response agree well with experimentally measured values. Notably, the model can simulate the progressive failure in a more visualized way, and MFPA 2D is proved to be an effective way for understanding the failure mechanism of the reinforced concrete structures. It has been found that the fracture of the concrete observed at the macroscopic level is predominated by tensile damage at the mesoscopic level. The authors are now developing the MFPA 3D code for the 3D modeling of the reinforced concrete structures.
Numerical simulation of crack development in reinforced concrete structures under eccentric loading
Numerische Simulation der Rissentwicklung in Stahlbetonbauten unter exzentrischer Belastung
Zhang, Juanxia (Autor:in) / Liu, Junjie (Autor:in) / Tang, Chun-An (Autor:in) / Chang, Xu (Autor:in) / Wang, Shuhong (Autor:in) / Zhu, Wancheng (Autor:in) / Zhao, Wen (Autor:in)
2005
6 Seiten, 5 Bilder, 15 Quellen
Aufsatz (Konferenz)
Englisch
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