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RELIABILITY ANALYSIS OF REDUNDANT DUCTILE STRUCTURAL SYSTEMS.

机译：冗余延性结构体系的可靠性分析。

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摘要

Because the information concerning loads and resistance capacities invariably contains uncertainty, the safety of a structure may be measured realistically in terms of the probability of failure. The purpose of this study is to develop a practical method for determining the point estimate of the collapse probability of ductile structural systems, particularly, plastic frameworks and trusses.;The first step of the proposed method of analysis is to identify the major collapse mechanisms. This step is transformed into an unconstrained nonlinear minimization problem and Hooke and Jeeves pattern search was adopted as the solution technique. Once the major mechanisms are identified, their corresponding performance functions may be developed through the principle of virtual work, from which the individual mechanism collapse probabilities are calculated. The system collapse probability is then evaluated through the method of PNET.;Results of the proposed method showed good agreement with corresponding Monte Carlo calculations for a wide variety of example problems examined.;In addition to the assumption that classical simple plastic method of analysis is applicable, the magnitudes of loads and the component resistance capacities of a structure are assumed to be stochastic with known distributions (e.g., normal).
机译：因为有关负载和阻力能力的信息总是包含不确定性，所以可以根据发生故障的可能性来实际测量结构的安全性。这项研究的目的是开发一种实用的方法来确定延性结构系统（尤其是塑料框架和桁架）倒塌概率的点估计。拟议的分析方法的第一步是确定主要的倒塌机理。该步骤转化为无约束非线性最小化问题，采用Hooke和Jeeves模式搜索作为求解技术。一旦确定了主要机制，就可以通过虚拟工作原理来开发其相应的性能功能，从中可以计算出各个机制的崩溃概率。然后通过PNET方法评估系统崩溃的可能性。所提出的方法的结果与相应的蒙特卡洛计算结果相吻合，适用于研究的各种示例问题。在适用的情况下，假定结构的载荷大小和组件的抵抗力是随机的，且具有已知的分布（例如，正态）。

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  • 作者

    MA, HAK-FONG.;

  • 作者单位

    University of Illinois at Urbana-Champaign.;

  • 授予单位 University of Illinois at Urbana-Champaign.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 1982
  • 页码 157 p.
  • 总页数 157
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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