木塑框架结构的可靠性分析

Reliability analysis for single-span two-story wood plastic construction

为了分析单跨双层木塑框架结构在实际应用中的可靠性,确定其塑性铰的位置和个数,利用了失效树法确定主要失效机构,根据虚位移理论确定它们的功能函数,分别计算8个主要失效机构的可靠性指标及失效概率.运用相关性分析法确定了该结构体系失效的代表机构,通过概率性网络评价技术计算其失效概率和可靠度,该单跨双层木塑框架结构的可靠度为91%.

In order to analyze the reliability of one - span two - story wood plastic frame con- struction in practical application, first, the position and number of plastic hinge were deter- mined. The fault tree analysis method was used ＂to determine 8 main failure mechanisms. The functions of them were determined according to the virtual displacement theory, and the failure probability of functions was calculated. The reliability indexes of the 8 main failure mechanism were calculated, and the represent mechanisms of the structure system were de- termined using the correlation analysis method. The probabilistic network evaluation tech- nique was used to calculate the failure probability and reliability. The reliability of the single -span two -story wood -plastic frame construction was 91.1%.