...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Effect of earthquake-induced axial load fluctuations on asymmetric frame-wall-rocking foundation systems
【24h】

Effect of earthquake-induced axial load fluctuations on asymmetric frame-wall-rocking foundation systems

机译：地震引起的轴向载荷波动对不对称框架-墙-摇摆基础系统的影响

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

Fluctuations in axial load imposed on a rocking footing will affect its moment capacity, the shape of its moment-rotation hysteresis, and potentially the system's seismic performance. Structural asymmetry increases the likelihood of axial load variation during earthquake excitations. To investigate this issue, a unique centrifuge testing program was carried out on low-rise frame-wall-rocking foundation systems. In this paper, the seismic behaviors of asymmetric and symmetric models from this test program are systematically compared. Experimental results reveal that placing the lateral force resisting shear wall outboard produces significant axial load fluctuation, which in turn greatly deteriorate the lateral load-carrying capacity of a foundation rocking dominated frame-wall system, particularly in its weak direction. However, it strengthens the system when loading is towards the shear wall, leading to a highly asymmetric hysteretic response. During earthquake loading, all asymmetric rocking foundation systems observe smaller peak roof accelerations, but larger peak and permanent roof drifts compared with the symmetric systems. Despite these differences in response, the axial load fluctuation and structural asymmetry do not significantly change the relative energy dissipated by the rocking foundations and inelastic structural components within each frame-wall-rocking foundation model. Copyright (c) 2015 John Wiley & Sons, Ltd.
机译：施加在摇摆基脚上的轴向载荷的波动将影响其力矩能力，力矩-旋转磁滞的形状以及系统的抗震性能。结构不对称性增加了地震激发过程中轴向载荷变化的可能性。为了调查这个问题，在低层框架-墙-摇摆基础系统上进行了独特的离心机测试程序。在本文中，系统地比较了该测试程序中非对称和对称模型的抗震性能。实验结果表明，将抗侧向力的剪力墙放置在外侧会产生较大的轴向载荷波动，进而大大削弱了以基础摇摆为主的框架墙系统的侧向承载能力，特别是在其弱方向上。但是，当载荷朝向剪力墙时，它会增强系统，导致高度不对称的滞后响应。在地震荷载作用下，与对称系统相比，所有非对称摇摆基础系统都观测到较小的峰值屋顶加速度，但观测到较大的峰值和永久性屋顶漂移。尽管在响应方面存在这些差异，但轴向载荷波动和结构不对称性并未显着改变每个框架-墙-摇摆基础模型中的摇摆基础和非弹性结构组件所耗散的相对能量。版权所有（c）2015 John Wiley＆Sons，Ltd.

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