...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Engineering Structures >Cyclic Pushover Analysis procedure to estimate seismic demands for buildings
【24h】

Cyclic Pushover Analysis procedure to estimate seismic demands for buildings

机译：循环推覆分析程序估算建筑物的地震需求

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Conventional Pushover Analysis relies on the use of monotonic lateral load distribution. The seismic displacement demands based on this procedure are considered an approximate solution that has not taken into account the cyclic loading effects. Under earthquake loading, structural components experience stiffness degradation and strength deterioration, which are the important characteristics of reinforced concrete members under cyclic loading, causing a reduction of deformation capacity. The Cyclic Pushover Procedure is proposed to estimate seismic demands of buildings that take into account the cumulative damage under cyclic loading. The cyclic lateral force distribution is developed based on the mode shapes and the prescribed displacement history. The cyclic pushover curve is converted to the equivalent SDOF pseudo-acceleration and displacement relationship based on the first mode response of the structure. The seismic demands of a 9-story reinforced concrete building are evaluated by Cyclic Pushover Procedure. Four types of loading protocol, i.e., Laboratory, ATC-24, International Organization for Standardization (ISO), and Sequential Phased Displacement (SPD) protocols are employed to investigate the effects of displacement histories on seismic demands. The seismic demands include the peak roof displacement, the peak floor displacement and the peak inter-story drift ratio. The results are compared with the exact demands resulting from nonlinear time history analyses of MDOF structure subjected to 20 ground motions, as well as the demands estimated from the Modal Pushover Analysis. The results demonstrate that the Cyclic Pushover Analysis provides a reasonable and accurate estimate of seismic displacement demands.
机译：传统的推覆分析依赖于使用单调的侧向载荷分布。基于此过程的地震位移要求被认为是一种近似解决方案，未考虑循环荷载效应。在地震荷载作用下，结构构件会经历刚度下降和强度下降，这是循环荷载下钢筋混凝土构件的重要特征，从而导致变形能力降低。建议采用“循环推覆程序”来估计建筑物的地震需求，其中要考虑到循环荷载下的累积破坏。周期性的横向力分布是根据振型和规定的位移历史来确定的。基于结构的第一模式响应，将循环推覆曲线转换为等效的SDOF伪加速度和位移关系。通过循环推覆程序评估了9层钢筋混凝土建筑的抗震要求。四种类型的加载协议，即实验室，ATC-24，国际标准化组织（ISO）和顺序相位移（SPD）协议被用于研究位移历史对地震需求的影响。地震需求包括顶棚顶位移，顶底位移和层间位移峰值。将结果与进行20次地面运动的MDOF结构的非线性时程分析所产生的精确需求以及模态推覆分析所估算的需求进行了比较。结果表明，循环推覆分析为地震位移需求提供了合理而准确的估计。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号