• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Dynamic rocking response of a rigid planar block on a nonlinear hysteretic Winkler foundation
【24h】

Dynamic rocking response of a rigid planar block on a nonlinear hysteretic Winkler foundation

机译：非线性滞后型洪新乐基础上刚性平面块的动态摇摆响应

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

A new design philosophy termed "rocking isolation" has been advocated in recent studies on soil-structure interaction (SSI) toward utilizing nonlinear foundation response for seismic protection of structures. Allowing structures to rock on their foundation enables nonlinearities arising from base uplifting and soil yielding to limit seismic actions on structures, contributing to resilient SSI systems with controllable residual deformation. The current work presents an improved Winkler-based rocking foundation model as an efficient practical tool to calculate the dynamic response of a rocking isolation system idealized as a rigid rectangular block rocking on a nonlinear hysteretic foundation allowing for base uplift. Compared with existing Winkler models where coupled shear-compressive soil behavior is usually ignored, improvements are made by using smooth biaxial hysteretic elements to describe the point-wise constitutive relation between tractions and displacements at the base. The foundation model is calibrated and validated against published experimental and numerical simulation data on clayey foundations. Analytical expressions are derived to estimate foundation rocking stiffness and failure envelope which describes the interaction between ultimate resultant forces developed on the foundation. The free-vibrational and seismic responses of a class of flexibly supported rigid rocking blocks are examined using the proposed model through nonlinear response-history analyses. It is found that sliding due to the coupled shear-compressive soil behavior tends to reduce free-vibrational rocking response of blocks with smaller slenderness ratios, while it may increase or decrease seismic overturning potential of blocks on heavily loaded foundations.
机译：最近关于土壤 - 结构相互作用（SSI）利用建筑地震保护的非线性基础反应的土壤结构相互作用（SSI）的研究，已经倡导了“摇摆孤立”的新设计理念。允许在其基础上摇滚结构使得从基地振奋和土壤产生的非线性产生，以限制结构上的地震动作，有助于具有可控残余变形的弹性SSI系统。目前的工作介绍了一种改进的基于Winkler的摇摆基础模型，作为一种有效的实用工具，以计算摇摆隔离系统的动态响应，其理想化为一个刚性滞后堵塞的刚性矩形块，允许基础隆起。与通常忽略耦合剪切压缩土壤行为的现有的旋芯模型相比，通过使用光滑的双轴滞后元件来描述碱基之间的牵引与位移之间的点明智的本构体关系的改进。基础模型进行校准并验证了CLAYEY基础上发表的实验和数值模拟数据。衍生分析表达以估计基础摇摆刚度和故障包络，其描述了基础上产生的极限合作力之间的相互作用。通过非线性反应历史分析使用所提出的模型检查一类灵活支持的刚性摇摆块的自由振动和地震反应。发现由于偶联的剪切压缩土壤行为引起的滑动趋于减少具有较小细长比的块的自由振动摇摆响应，而在大量装载的基础上可能会增加或减少块的地震倾覆潜力。

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