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Numerical investigation on progressive collapse resistance of post-tensioned precast concrete beam-column assemblies under a column-loss scenario
Highlights Post-tensioned precast concrete (PTPC) frame model was established and validated using previous experimental data. Modelling method for the concrete-concrete interface behavior was provided in this study. Understanding of the load-carrying mechanism of PTPC frames. Implications for structural design of PTPC frames against progressive collapse.
Abstract Post-tensioned precast concrete (PTPC) frames exhibit better seismic behavior and self-centering capability than conventional precast concrete frames, but few studies have focused on the progressive collapse performance of PTPC frames. Moreover, previous studies on the progressive collapse response of PTPC frames did not consider the development of the beam-column interface stress. In this study, a three-dimensional nonlinear finite element model (FEM) of a PTPC frame is established and validated using previous experimental results. In particular, the cohesive zone model and Coulomb friction model are used to simulate the development of normal and shear stresses at the beam–column interface. The overall response and failure modes are simulated well by this FEM. In addition, the progressive collapse mechanism of PTPC frames is elaborated and the load resistance component of the frames is analyzed. Parametric studies are performed based on the calibrated FEM. The results demonstrate that a PTPC frame is incapable of developing an effective beam flexural action to resist progressive collapse and the beam compressive arch action (CAA) makes a negative contribution to the progressive collapse resistance under large deformation. The condition of the beam–column interface has a limited effect on the tensile catenary action response of PTPC frames, yet influences the CAA response.
Numerical investigation on progressive collapse resistance of post-tensioned precast concrete beam-column assemblies under a column-loss scenario
Highlights Post-tensioned precast concrete (PTPC) frame model was established and validated using previous experimental data. Modelling method for the concrete-concrete interface behavior was provided in this study. Understanding of the load-carrying mechanism of PTPC frames. Implications for structural design of PTPC frames against progressive collapse.
Abstract Post-tensioned precast concrete (PTPC) frames exhibit better seismic behavior and self-centering capability than conventional precast concrete frames, but few studies have focused on the progressive collapse performance of PTPC frames. Moreover, previous studies on the progressive collapse response of PTPC frames did not consider the development of the beam-column interface stress. In this study, a three-dimensional nonlinear finite element model (FEM) of a PTPC frame is established and validated using previous experimental results. In particular, the cohesive zone model and Coulomb friction model are used to simulate the development of normal and shear stresses at the beam–column interface. The overall response and failure modes are simulated well by this FEM. In addition, the progressive collapse mechanism of PTPC frames is elaborated and the load resistance component of the frames is analyzed. Parametric studies are performed based on the calibrated FEM. The results demonstrate that a PTPC frame is incapable of developing an effective beam flexural action to resist progressive collapse and the beam compressive arch action (CAA) makes a negative contribution to the progressive collapse resistance under large deformation. The condition of the beam–column interface has a limited effect on the tensile catenary action response of PTPC frames, yet influences the CAA response.
Numerical investigation on progressive collapse resistance of post-tensioned precast concrete beam-column assemblies under a column-loss scenario
Tao, Yuxuan (Autor:in) / Huang, Yuan (Autor:in)
Engineering Structures ; 251
29.10.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Investigation of precast RC beam-column assemblies under column-loss scenario
| Online Contents | 2017
Investigation of precast RC beam-column assemblies under column-loss scenario
| British Library Online Contents | 2017