• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earthquake and structures: An International journal of earthquake engineering & earthquake effects on structures >Progressive collapse vulnerability in 6-Story RC symmetric and asymmetric buildings under earthquake loads
【24h】

Progressive collapse vulnerability in 6-Story RC symmetric and asymmetric buildings under earthquake loads

机译：地震荷载作用下6层RC对称和非对称建筑物的渐进倒塌脆弱性

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

Progressive collapse, which is referred to as the collapse of the entire building under local damages, is a common failure mode happened by earthquakes. The collapse process highly depends on the whole structural system. Since, asymmetry of the building plan leads to the local damage concentration; it may intensify the progressive collapse mechanism of asymmetric buildings. In this research the progressive collapse of regular and irregular 6-story RC ordinary moment resisting frame buildings are studied in the presence of the earthquake loads. Collapse process and collapse propagation are investigated using nonlinear time history analyses (NLTHA) in buildings with 5%, 15% and 25% mass asymmetry with respect to the number of collapsed hinges and story drifts criteria. Results show that increasing the value of mass eccentricity makes the asymmetric buildings become unstable earlier and in the early stages with lower number of the collapsed hinges. So, with increasing the mass eccentricity in building, instability and collapse of the entire building occurs earlier, with lower potential of the progressive collapse. It is also demonstrated that with increasing the mass asymmetry the decreasing trend of the number of collapsed beam and column hinges is approximately similar to the decreasing trend in the average story drifts of the mass centers and stiff edges. So, as an alternative to a much difficult-to-calculate local response parameter of the number of collapsed hinges, the story drift, as a global response parameter, measures the potential of progressive collapse more easily.
机译：渐进式倒塌，是指整个建筑物在局部破坏下的倒塌，是地震造成的常见破坏模式。倒塌过程在很大程度上取决于整个结构系统。由于建筑计划的不对称会导致局部破坏集中;它可能会加剧不对称建筑物的渐进倒塌机制。在这项研究中，研究了在地震荷载作用下规则和不规则的6层RC普通抗弯框架建筑物的逐步倒塌。使用非线性时程分析（NLTHA），对坍落铰链数量和故事漂移标准的质量不对称性为5％，15％和25％的建筑物，研究坍塌过程和坍塌传播。结果表明，增加质量偏心率的值会使不对称建筑物在早期和早期变得不稳定，而折叠铰链的数量减少。因此，随着建筑物中质量偏心率的增加，整个建筑物的不稳定性和倒塌会更早发生，而逐渐倒塌的可能性较低。还表明，随着质量不对称性的增加，塌陷的梁和柱铰链数量的减少趋势与质心和刚性边缘的平均层间位移的减少趋势近似相似。因此，作为难以计算的折叠铰链数量的局部响应参数的替代方法，故事漂移作为全局响应参数，可以更轻松地测量逐步塌陷的可能性。

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