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Finite-Element Simulation of Posttensioned Steel Connections with Bolted Angles under Cyclic Loading
| 题名： | Finite-Element Simulation of Posttensioned Steel Connections with Bolted Angles under Cyclic Loading |
| 正文语种： | 英文 |
| 作者： | Saber Moradi;M. Shahria Alam |
| 作者单位： | School of Engineering, Univ, of British Columbia;School of Engineering, Univ, of British Columbia |
| 关键词： | Steel structures; Connections; Posttensioning; Finite-element method; Earthquake; Cyclic loading; Simulation; Analysis and computation. |
| 摘要： | Steel beam-column connections with posttensioned (PT) elements are proven systems that can provide adequate stiffness, strength, and ductility, while eliminating permanent deformations in a moment-resisting frame subjected to seismic loading. In this study, detailed three-dimensional finite-element (FE) models of steel beam-column connections with PT strands are developed and analyzed under cyclic loading. Efforts are made to overcome challenges in performing the non linear FE analysis of large-scale PT corm ections, which involves gap opening and closing behavior as well as contact and sliding phenomena. Geometric and material nonlinearities, preloaded bolts and strands are also considered in the modeling. Through a verification study, the results from the FE models are validated against prior experiments on interior PT conn ections with top-and-seat angles. Parametric studies are also conducted to investigate the effects of three factors on the cyclic performance of PT connections. The factors investigated in this study are: the presence of beam flange reinforcing plates, the yield strength and strain hardening of steel angles, and the amount of initial posttensioning force in the strands. DOI: 10.1061/(ASCE)ST ・1943-541X.0001336. © 2015 American Society of Civil Engineers. |
| 出版日期： | 2016.01 |
| 出版年： | 2016 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.142 |
| 期： | NO.01 |
| 页码： | 04015075 |
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