建筑钢结构进展2013，Vol.15Issue(2)：11-20,51,11.
基于多功能函数的双层球面网壳结构的可靠度及敏感性研究
Reliability and Sensitivity Analysis of Double-Layer Spherical Lattice Shells Using Multiple Performance Functions
摘要
Abstract
The paper aims to investigate reliability, sensitivity and correlation of four double-layer spherical lattice shells (with rise-to-span ratio of 1/3,1/4,1/5 and 1/6) subjected to several different load levels. To deeply study the effect of external load, physical properties and geometric parameters of chords on reliability of lattice shells, cross-sectional area,modulus of elasticity and yield strength are defined as random variables,according to types of random variables in lattice shells. In order to clarify mechanical performance of four lattice shells, four output indexes, i. e. .maximal deflection,total plastic strain energy,number of yielding members/chords and total plastic strain,are defined into four performance functions, respectively. Furthermore, sensitivity analysis of all random variables to the above-mentioned performance functions and their correlations are extensively carried out. Finally,changing laws of reliability,sensitivity and correlation are investigated in detail with increment of rise-to-span ratio.关键词
双层球面网壳/可靠度/敏感性/功能函数/相关性Key words
double-layer spherical lattice shell/reliability: sensitivity/performance function/correlation分类
建筑与水利引用本文复制引用
李会军,王正中..基于多功能函数的双层球面网壳结构的可靠度及敏感性研究[J].建筑钢结构进展,2013,15(2):11-20,51,11.基金项目
国家自然科学基金(51179164),中央高校基本科研业务费专项资金(QN2012027),2012年西北农林科技大学博士科研启动基金(2012BSJJ002) （51179164）
