Three-dimensional soil-structure response to earthquakes
Three-dimensional soil-structure response to earthquakes
复制标题
三维土壤结构对地震的响应
DOI：
10.1785/bssa0630031041
复制
发表时间：
1973
期刊：
影响因子：
--
通讯作者：
K. Höeg
中科院分区：
文献类型：
--
作者：
W. Weaver;G. Brandow;K. Höeg
多层建筑物对基岩地震加速度的动力响应计算应考虑地基土和结构基础的影响。为此，开发了一个三维分析模型，由以下部分组成。上部结构被建模为多层建筑（具有刚性楼板、空间框架构件、支撑和回缩）;基础近似为刚性块体与桩（具有销接端部的棱柱构件）的组合，土壤通过具有特殊边界条件（侧向边界处的粘性阻尼和基岩处的刚性边界）的有限元网格（三维矩形棱柱）理想化。这个分析模型被纳入一个计算机程序中，该程序对指定的地震进行响应分析。样本问题，包括演示分析模型和计算机程序的能力。结果表明，三维分析模型的组合和下卧土层的存在对多层建筑的地震反应计算有重要影响。
Calculations for the dynamic response of multistory buildings to earthquake accelerations of bedrock should include the effects of the soil and the structural foundation. For this purpose a three-dimensional analytical model is developed, consisting of the following parts. The superstructure is modeled as a tier building (with rigid floor diaphragms, space frame members, bracing, and setbacks); the foundation is approximated by a rigid block in combination with piles (prismatic members with pinned ends), and the soil is idealized by a finite-element mesh (three-dimensional rectangular prisms) with special boundary conditions (viscous damping at lateral boundaries and a rigid boundary at bedrock). This analytical model is incorporated into a computer program, which performs response analyses for specified earthquakes. Sample problems are included to demonstrate the capabilities of both the analytical model and the computer program. The results show that the combination of a three-dimensional analytical model and the presence of underlying soil has important influences on the calculated responses of multistory buildings to earthquakes.