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

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.

这项研究旨在引入不确定结构的随机反应分析和可靠性分析，这些结构考虑了结构系统和地震激发中的不确定性，并建立了建筑结构的合理亚抗性设计。研究结构系统和地震激励的建模的重要不确定参数，它们被研究为随机变量。提出了用于鉴定结构参数的随机鉴定的分析方法，并提出了从地震加速度观察到地面结构上的地震加速度的随机估计。通过在失败标准中对不确定参数的建模引入了近似概率密度函数的分析形式。这些近似概率密度函数的效率是通过蒙特卡洛模拟验证的。评估整个结构系统的可靠性函数和结构组件的可靠性函数的效率，并通过使用响应表面方法和中央复合设计方法来提供结构组件的可靠性。所提出的方法具有减少蒙特卡洛模拟技术所需的计算工作的优势。在巨大的汉辛 - 阿瓦吉地震灾难中，许多建筑物和房屋受到了严重损害。研究了木制房屋和钢筋混凝土结构的地震损伤。结构，尤其是木房屋中有许多不确定性。因此，对动态特性的不确定性进行了观察和实验研究。