火灾后钢筋混凝土梁剩余承载力的分析与计算  

Characteristics of the strength of ceramic waste sand concrete

作　　者：姜封国[1] 陈辉[1] 白丽丽 

机构地区：[1]黑龙江科技学院建筑工程学院,黑龙江哈尔滨150027

出　　处：《混凝土》2008年第2期57-59,共3页Concrete

基　　金：辽宁省教育厅基金项目

摘　　要：火灾作用后构件的剩余承载力的计算是以构件经修复后可以继续使用为前提的。以单筋矩形截面梁为例,忽略了剪切破坏问题,从分析计算构件的温度场着手,提出了一种计算火灾后钢筋混凝土构件的剩余承载力的方法,在此方法中,把火灾后钢筋强度视为不变,而把原有截面积视为减小,通过具体算例的数值解和其他文献的试验值进行了比较,结果吻合很好,从而验证了该算法的正确性,为高温后钢筋混凝土结构的安全评估及修复加固提供了理论依据。The calculation on the residual capacity of RC beam post fire is on the premise that the member can use continue after repairing.The rectangle beam with single reinforcement be discussed, and the shear failure be neglected, started from analyzing the temperature field of member, a method be given to calculate the residual capacity of the RC member.In this method, the strengthen of the reinforcement be considered as invariant, and the original area of section be regarded as reduced.The numerical solution of the calculated example and the experiment value be compared, the result be matching well, so the appliance of the method be proved, and the theory base on the safe assessment and repair reinforcement of RC member post high temperature be supplied.

关 键 词：ANSYS 等效截面缩减法 钢筋混凝土梁 剩余承载力 

分 类 号：TU375.1[建筑科学—结构工程]