“小震”作用下索网结构可靠指标β的计算方法

A Method for Calculating Reliability Indices of Cable Roof Structures underSmall Earthquakes

将Ｗｉｌｓｏｎ～θ法与ＪＣ方法相结合，建立了“小震”作用下索网结构各单元承载能力可靠指标与索系正常使用可靠指标的计算方法，并考虑了索网结构的几何非线性特性以及静载的影响。利用该方法可求出索网结构在“小震”过程中任意时刻单元承载能力可靠指标与索系正常使用可靠指标，并可推广用于分析“大震”作用下考虑索系材料非线性时索网结构的可靠度。

By combining the Wilson θ method with JC method, a new method is developed in this paper to calculate the load bearing capacity and serviceable reliability indices of cable roof structures under small earthquakes'.The geometry nonlinearity of cable roof structures and the effects of dead load on cable roof structures are taken into consideration in this new method.By using the method,the load bearing capacity and serviceable reliability indices of cable roof structures at any time during small earthquakes' can be calculated.The method may be improved to analyze the elastoplatic reliability of cable roof structures under large earthquakes'.