原文传递
Finite-Element Modeling of Progressive Failure for Floor-to-Floor Assembly in the Precast Cross-Wall Structures
| 题名： | Finite-Element Modeling of Progressive Failure for Floor-to-Floor Assembly in the Precast Cross-Wall Structures |
| 正文语种： | 英文 |
| 作者： | Mosleh Tohidi, Ph.D.; Alan Janby |
| 作者单位： | Islamic Azad Univ;The London College |
| 关键词： | Progressive collapse; Pullout modeling; Precast concrete; Cross-wall; Catenary actions; Translator; Dynamic analysis |
| 摘要： | The progressive collapse of building structures typically occurs when an abnormal loading condition causes a sudden loss in the structural capacity of one or more critical members, which leads to a chain reaction of failure and, ultimately, catastrophic collapse. This is the first of two independent papers involving a fundamental study of a numerical model for a progressive collapse-resistance design of a floor-to-floor joint in precast cross-wall structures This paper presents a finite-element (FE) model for the progressive analysis of a precast floor-to-floor system by considering a bar fracture and pull-out failure mode. The problem is studied using nonlinear dynamic finite-element simulations carried out following the Department of Defense (DoD) guidelines. The paper focuses on developing a model for a global analysis of precast structures when subject to increasing vertical loading and notional removal wall support. To this end, detailed three-dimensional (3D) finite-element models of the pull out behavior of a reinforcement bar in the keyway of precast concrete blocks to simulate pull-outs or a bar fracture failure mode were developed. The same modeling method was then used in the subsequent 3D nonlinear numerical analyses to simulate the ductility behavior of precast concrete floor joints in the absence of underlying wall supports. The objective of the present study is to identify modeling parameters affecting the behavior of the system and propose a model for a progressive analysis of a precast structure. |
| 出版日期： | 2020 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.06 |
| 页码： | 04020087 |
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