Automatic design system for building structure-foundation models based on hybrid inverse formulation

基于混合反演的建筑结构-基础模型自动设计系统

• 批准号: 12450225
• 负责人: TAKEWAKI Izuru
• 金额: $ 3.52万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450225/
• 关键词: dynamic soil-structure interaction; inverse problem; response-controlled design; surface ground; design earthquake; pile-supported structure; response spectrum method; wave propagation theory; 基礎構造物; 不規則振動; 極限外乱

The purpose of this project is to develop a new method of structural design for building structures supported by grounds which can be used as a powerful design system in a design decision-making process. The following results have been obtained in this project.1. An efficient stiffness design method for building structures is proposed in which nonlinear soil amplification and soil-structure interaction are taken into account in terms of equivalent linearization. A sway-rocking shear building model with appropriate ground impedances derived from both finite element analysis and the equivalent linearization technique is used as a simplified design model and super-structure stiffnesses satisfying a desired stiffness performance condition are determined for a ground-surface response spectrum. The ground-surface response spectrum is transformed from the design response spectrum defined at the upper surface level of the engineering bedrock via the equivalent linearization technique and the o … More ne-dimensional wave propagation theory. In the process of the super-structure stiffness design, an improved and advanced inverse formulation is developed.2. The soil resisting mechanism for piles is represented here by a dynamic Winkler-type spring. Two models for analysis and design of pile-supported building structures have been proposed. The first-type model is a multi-input continuum model which deals with the governing differential equation directly and enables the introduction of the one-dimensional wave propagation theory. The second-type model is a single-input finite-element model enabling the introduction of the response spectrum method. The maximum seismic response of the models to the ground motion defined at the engineering bedrock surface as an acceleration response spectrum is evaluated by the response spectrum method in terms of complex modal quantities. The stiffness design for a specified maximum interstory drift and a pile stress ratio has been obtained by regarding the lowest natural frequency and pile size as principal parameters.3. A new method of critical excitation has been developed. It has been shown that a critical excitation method and a robust design method for that critical excitation can be developed by using an efficient critical excitation method due to the present project leader. Less

本课题的目的是开发一种新的地基支撑建筑结构设计方法，在设计决策过程中作为一个强大的设计系统。在本项目中获得了以下结果：提出了一种基于等效线性化的考虑土体非线性放大和土-结构相互作用的建筑结构刚度设计方法。采用有限元分析和等效线性化技术推导出具有适当地阻抗的摇摆剪切建筑模型作为简化设计模型，并根据地表响应谱确定了满足所需刚度性能条件的上部结构刚度。通过等效线性化技术和o . More一维波传播理论，将工程基岩上表面确定的设计响应谱转化为地表响应谱。在上部结构刚度设计过程中，提出了一种改进的、先进的反公式。桩的抗土机理用动态温克勒弹簧来表示。提出了两种桩基建筑结构分析与设计模型。第一类模型是直接处理控制微分方程的多输入连续体模型，可以引入一维波传播理论。第二类模型为单输入有限元模型，可引入响应谱法。用复模态量的响应谱法计算了模型在工程基岩表面对地震动的最大地震响应，并将其定义为加速度响应谱。以最低固有频率和桩径为主要参数，得到了给定最大层间位移和桩应力比下的刚度设计。提出了一种新的临界激励方法。研究表明，由于项目负责人的存在，采用一种有效的临界激励方法，可以发展出一种临界激励方法和一种针对该临界激励的稳健设计方法。少