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Uncertain Modeling and Evaluation of Reliability of Structures

结构可靠性的不确定建模与评估

基本信息

批准号：
07455222
负责人：
SUZUKI Yoshiyuki
金额：
$ 2.5万
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：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455222/
关键词：
Uncertainy Reliability Failure criterion Simulation Random Monte Carlo technique Aseismic design

项目摘要

This study aims to introduce stochastic response analyzes and reliability analyzes of uncertain structures taking account of uncertainties in structural systems and seismic excitations and to establish a rational aseismic design of building structures.The important uncertain parameters in modeling structural systems and seismic excitations are investigated, and they are modeled as random variables. The analytical methods for stochastic identification of structural parameters and stochastic estimation of structural responses from observations of seismic accelerations on ground-structures were presented.The analytical forms of approximate probability density functions with respect ot structural damages were introduced by modeling of uncertain parameters in failure criteria. The efficiency of these approximate probability density functions are verified from Monte Carlo simulations.The method for evaluating the reliability function of the whole structural system and those of structural components were presented by making use of the response surface method and central composite design method. And the proposed method has advantage of reducing computational efforts required in the Monte Carlo simulation techniques.In the Great Hanshin-Awaji Earthquake Disaster, a large number of buildings and houses were seriously damaged. The seismic damages of wood houses and reinforced concrete structures were investigated. There are many uncertainties in structures, in particular, wood houses. Therefore the observation and experimental studies on uncertainties of dynamic properties were carried out.

本研究旨在引入考虑结构系统和地震激励不确定性的不确定结构的随机响应分析和可靠性分析，建立合理的建筑结构抗震设计。研究了结构系统和地震激励建模中重要的不确定参数，并将它们建模为随机变量。提出了结构参数随机识别和根据地面结构地震加速度观测随机估计结构响应的分析方法。通过对失效准则中的不确定参数进行建模，引入了结构损伤的近似概率密度函数的分析形式。蒙特卡洛模拟验证了这些近似概率密度函数的有效性。提出了利用响应面法和中心组合设计法评价整个结构系统和结构部件可靠性函数的方法。并且所提出的方法具有减少蒙特卡罗模拟技术所需的计算量的优点。阪神淡路大地震中，大量建筑物和房屋遭到严重损坏。对木结构房屋和钢筋混凝土结构的地震破坏进行了调查。结构存在很多不确定性，尤其是木结构房屋。为此，开展了动态特性不确定性的观测和实验研究。