抗震变形验算中钢筋混凝土梁柱截面特性的计算

Calculation method of the elasto-plastic section characteristics of RC beam and column

罕遇地震作用下结构的抗震变形验算需要利用钢筋混凝土梁柱构件的三折线模型，国内外对该模 型的主要参数Ｍｃ，Ｍｙ，α有不同的计算方法。本文介绍了几种典型的方法，并通过数值算例进行了对比 计算．其中基于近似理论分析的方法与基于实验统计的经验方法之间的差异不超过２０％～３０％，可用于 工程实践．本文还比较了各种方法的适用性．

Tri-liner model of reinforced concrete beam and column is needed during the process of deformation calculation of RC structure under large earthquake. The Mｃ.,Mｙ, and α of the tri-linear model can be calculated with different method. In this paper four methods are introduced, and some numerical examples are calculated in order to compare these methods. The difference between theoretical and experimental methods is less than 20% - 30%. The availability of these methods is compared.