RC结构火灾后的三维抗震性能研究

Three Dimensional Aseismatic Performance of Reinforced Concrete Structure after Fire

以结构工程分析中常见的三维空间杆系有限元为基础，利用钢筋混凝土构件（ＲＣ）火灾后的截面剩余抗弯刚度统计公式，对火灾后钢筋混凝土空间框架结构进行三维抗震分析．可对灾后结构的剩余整体强度作出诊断，并为加固设计提供依据．

By making use of the statistical formula for sectional residual antiflex rigidity of reinforced concrete member after fire, a three dimensional aseimatic analysis is made on reinforced concrete space frame structure. The method is based on the three dimensional space rod system finite element which is common in the analysis of structural engineering. It gives diagnosis on residual overall strength of a structure after fire; and provides a basis for bracing design.