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Seismic behavior and retrofitting of reinforced concrete moment resistant frames.

机译：钢筋混凝土抗弯框架的抗震性能和改造。

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摘要

Many multistory reinforced concrete frame structures built prior to 1970's located in seismic zones have been designed only for gravity loads without any considerations for lateral loads. These structures are referred to as Gravity Load Designed (GLD) frames. The lack of seismic considerations in GLD structures results in non-ductile behavior that may cause the lateral load resistance of these buildings to be insufficient for even moderate earthquakes.; Based on the current Canadian practice as prescribed by CAN3-A23.3 1994, reinforced concrete structures located in seismic zones should be designed as ductile or nominally ductile frames. In this study, a typical 5-story frame building is designed as (a) ductile, (b) nominally ductile and (c) GLD frame. Analytical investigation is performed to evaluate and to compare the performance of each frame. The study includes "pushover" analysis and non-linear time-history analysis. The results in terms of story displacement, ductility, shear, drift, sequence of cracking and yielding and the damage potential are presented. As a result of the poor performance of the GLD frame, it is retrofitted with fiber-reinforced polymers (FRP). Different retrofitting schemes using FRP are used to compare the behavior in terms of ductility. In this study, the behavior of the retrofitted frame is compared with the that of the GLD frame.; Based on the results of this study, a guideline for improving the seismic performance of reinforced concrete frame structures is provided.
机译：1970年代以前建造的许多多层钢筋混凝土框架结构位于地震带，仅设计用于重力荷载，而没有考虑横向荷载。这些结构称为重力荷载设计（GLD）框架。 GLD结构缺乏地震考虑因素，导致非延性行为，可能导致这些建筑物的侧向荷载抵抗力不足以应对中等地震。根据1994年CAN3-A23.3规定的加拿大现行规范，位于地震带的钢筋混凝土结构应设计为延性或名义延性框架。在本研究中，典型的5层框架建筑被设计为（a）延性，（b）标称延性和（c）GLD框架。进行分析调查以评估和比较每个帧的性能。该研究包括“推覆”分析和非线性时程分析。给出了关于层位移，延性，剪切，漂移，开裂和屈服顺序以及潜在破坏的结果。由于GLD框架的性能较差，因此需要对它进行纤维增强聚合物（FRP）的翻新。使用FRP的不同改造方案用于比较延性方面的行为。在本研究中，将改装框架的行为与GLD框架的行为进行比较。根据这项研究的结果，提供了改善钢筋混凝土框架结构抗震性能的指南。

著录项

  • 作者

    Talebi, Shahram.;

  • 作者单位

    Ryerson University (Canada).;

  • 授予单位 Ryerson University (Canada).;
  • 学科 Engineering Civil.
  • 学位 M.A.Sc.
  • 年度 2003
  • 页码 186 p.
  • 总页数 186
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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