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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.

本文研究了考虑结构体系和地震激励不确定性的不确定性结构的随机响应分析和可靠度分析，并对结构体系和地震激励建模中的重要不确定性参数进行了随机变量建模。提出了由地面结构地震加速度观测值随机识别结构参数和随机估计结构响应的解析方法，通过对失效准则中不确定参数的建模，给出了结构损伤的近似概率密度函数的解析形式。通过Monte Carlo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复合设计法计算整个结构系统和结构构件可靠度函数的方法。在坂神淡路大地震中，大量的建筑物和房屋遭到严重破坏。对木结构房屋和钢筋混凝土结构房屋的震害进行了调查。结构上有许多不确定性，特别是木结构房屋。为此，开展了动力特性不确定性的观测和试验研究。