文档介绍：钢筋混凝土框架结构高温响应的数值分析摘要本文利用ANSYS对高温下钢筋混凝土框架进行分析,得到其温度场、应力、内力重分布以及承载力的一些计算结果,并将这些计算结果与试验进行对比,取得较为理想的结果。最后对抗火设计方法做了讨论。主要内容有: (1)利用有限元软件模拟钢筋混凝土结构的温度场,利用ANSYS的热分析模块对钢筋混凝土构件和结构的温度的分布和随时间的变化情况进行数值计算,并与前人的试验、数值计算结果进行对比,取得了较为理想的结果, 同时又对若干种贴近工程实际的截面尺寸的混凝土梁、柱构件进行有限元仿真,为抗火设计中温度场的确定提供依据。(2)在对钢筋混凝土火灾反应的探讨中,同样是采用数值模拟的手段分析高温下框架结构变形的特征、应力变化情况;结合实体单元后处理的方法, 着重分析了高温下框架结构内力重分布;借鉴常温下的塑性极限弯矩法结合截面等效折减模型计算了超静定结构的极限承载力,并与有限元模拟得到的结果进行对比。; (3)最后,针对本文的研究对抗火设计提出一些建议。关键词:钢筋混凝土框架结构ANSYS高温内力重分布极限承载力抗火设计 Numerical Analysis of Fire Resistance Behavior of Reinforced Concrete Frame Structure ABS。I‘RAC’I’ Inthisthesis,reinforeed concrete frames atelevated temperature was analyzed with included calculations oftemperature field,deformation, stress,internal force redistribution,post—fire ultimate calculations pared with experimental the fire—resistance design of reinforeed concrete structures was contained: (1)Temperature fieldwas simulated with finiteelement software toget the temperature distributing and the variety with time ofthe structure,which were pared with experimental several reinforeed concrete beams whose section sizewere close toconstruction were calculated with finiteelement software to provide the basis of determining the temperature field for the fire-resistance design. (2)In the discussing offire—resistance behavior,we analyzed thecharacteristic of deformation and the variety of stress of structures stillwith method of numerical analysis;The internal force redistribution of structure at elevated temperature was expressly analyzed with method of solid element post— with method ofthe plastic limitmoment method at ambient temperature and the equivalent reduction model of cross-section the ultimate loading ofthe indeterminate structure was calculated pared with simulation resultoffiniteelement. (3)Finally,the current fire design methods were reviewed,and under the research ofthispaper some suggestions were