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在对单层网壳火灾升温下非线性分析原理总结的基础上,通过对约800例4种常见形式的单层球面网壳结构(K8型、短程线型、施威德勒型及联方型),在设置不同几何参数的条件下,进行了整体不均匀升温、局部高温下的双重非线性有限元全过程分析,得到了其弹塑性稳定承载力的计算结果.并通过数学回归得到了火灾下单层网壳结构弹塑性稳定承载力计算表达式,给出单层网壳结构的实用抗火设计方法.
Based on the summary of the principle of non-linear analysis of single-layer reticulated shell fire, the effects of four typical forms of single-layer spherical reticulated shell (K8 type, short-range type, Schwedler type, ) Under the conditions of different geometrical parameters, the whole non-uniform temperature increase and the local non-linear finite element method under local high temperature were analyzed, and the calculation results of its elastic-plastic stability bearing capacity were obtained. The fires were obtained through mathematical regression Under the single-layer reticulated shell structure, the elastic-plastic stability of the bearing capacity of the expression, given single-layer reticulated shell structure of practical fire-resistant design method.