钢筋混凝土抗震框架的弯矩调幅

Bending Moment Amplitude Modulation for RC Aseismic Frames

研究了抗震框架弯矩调幅应遵循的原则、方法和步骤,探讨了大震作用下框架梁、柱塑性铰的塑性转角和二阶弯矩等问题。典型框架计算表明,本文所提计算方法简便易行,调幅后框架的抗震性能大为改善。

This paper studies the problem of moment modification for RC frames,in which the principle of moment modification and the design procedure of aseismic frames are presented.In addition,the plastic rotation of plastic hinges and the secondary moment of columns under major earthquakes arc discussed.By the compared designs between the clastic moment and the moment modification of typical frames,it is indicated that the design procedure of moment modification presented in the paper is not only quite simple but also reasonable in practice and the aseismic behaviours of frames arc improved greatly.