起重机金属结构可靠度分析

Structural Reliability Analysis of the Derrick

通过对起重机金属结构的载荷及强度分析,确立在多种载荷组合作用下的载荷效应,建立以失效单元为破坏模式的串并联单元,并以这些串并联单元共同组成金属结构体系的可靠度计算模型,同时引出其可靠度的计算方法以及以一阶二次矩计算的可靠度计算公式。

It has been established the load effect under the action of diversified combination of loads and series-parallel connection unit of Regarding failure unit as to collapse mode by analyzing strength and loads of the Derrick structure,and the calculational model of Structural Reliability of the Derrick has been constituted with these series-parallel connection units.At the same time,the calculational method of the its reliability has been given and the calculational formula calculated by first-order second-moment method has been deduced.