钢框架整体结构的抗火极限安全分析

FIRE RESISTANCE LIMIT AND SAFETY ANALYSIS OF STEEL FRAME ASSEMBLIES

摘要: 基于塑性极限上限分析，利用基本破坏机构迭加的方法，通过求解非线性规划问题对石油化工装置的钢框架结构进行了抗火极限分析研究。钢框架结构不仅包含了普通的平面框架结构，还有复杂的空间框架结构。并使用FORTRAN语言编制了钢框架的计算程序。与试验结果的对比和典型算例表明该方法简单有效，可以为钢框架整体结构抗火设计提供理论依据和计算方法。

Abstract: Based on the upper bound theorem, the fire resistance limit of steel frames in petrochemical equipments is studied. In the study, the fundamental collapse mechanisms are assumed to be superposed, and the nonlinear programming method is used. Both two-dimensional frame structures and three-dimensional frame structures are analyzed, and computer programs are developed with FORTRAN. The comparison with the experimental results shows that the proposed method is simple and efficient. It can be used in fire design of steel frame assemblies.