Earthquake-response constrained design methods of building structure-pile-soil systems via hybrid inverse formulation

在这个项目中，几种设计方法已被开发用于寻找建筑框架-桩-土系统的地震反应约束设计。该系统已被定义为使用的有限元模型，包括一个建筑框架和桩土系统，这两者都是由分布相互作用弹簧连接。设计地震已在桩的底部水平定义。主要结果如下：1.本文提出了一种新的理论，可以求出给定基本自振周期和最低振型应变比的建筑框架的杆件刚度。提出了固定基础框架结构地震应变约束设计的有效方法.提出了一种基础固定框架结构的双重抗震设计方法，使设计中震和设计大震下的反应约束满足相等或不等.本文提出了一种建筑框架-桩-土系统刚度设计的直接方法，该方法用于求出构件刚度，使框架在桩底设计中震作用下，构件端部平均峰值应变呈现特定的分布.针对具有指定高刚度地下室的共轴共偏心剪切型建筑物的地震位移约束设计问题，提出了一种有效的方法，该方法以无地下室剪切型建筑物的已知地震位移约束设计为基础，以地下室刚度柔度参数为地震反应约束设计的泰勒级数表示.本文提出了一种计算方法，它可以产生一组有序的竖向地震作用下双层网架结构的地震反应-应变约束设计，并给出了设计应变水平的参数。

In this project, several design methods have been developed for finding earthquake- response constrained designs of building frame-pile-soil systems. The system has been defined by the use of a finite element model consisting of a building frame and a pile-soil system both of which are connected by distributed interaction springs. The design earthquakes have been defined at the bottom level of the pile. The principal results are as follows.1. A new theory has been developed of finding member stiffnesses of a building frame for specified fundamental natural period and lowest-mode strain ratios. An efficient method of earthquake-strain constrained design has then been devised for a building frame with a fixed base.2. A dual seismic-resistant design method has been developed for a building frame with a fixed base such that the response constraints under the design moderate earthquakes and those under the design major earthquakes are satisfied as equality or inequality.3. A direct method of stiffness design of a building frame-pile-soil system has been developed for finding its member stiffnesses such that the frame would exhibit a specified distribution of mean peak member-end strains under an ensemble of design moderate earthquakes defined at the bottom of the pile.4. An efficient method has been developed for a problem of seismic-drift constrained design of a coaxialy coeccentric shear building with a basement of specified high stiffness in the form of Taylor series representation of earthquake-response constrained designs in terms of a flexibility parameter of the basement stiffness about the known seismic-drift constrained design of a shear building without basement.5. A computational method has been developed of generating an ordered set of seismic response-strain constrained designs of vertically excited double-layer grids, with respect to a parameter which specifies the design strain level.