桥梁抗震分析中桥墩M-φ曲线的求解  

The M-φ Curve Solution of Bridge Pier in Seismic Response Analysis

作　　者：刘喜平[1] 徐长玉[2] 

机构地区：[1]陕西理工学院土建学院,汉中723001 [2]西安铁路局延安机务段,延安716000

出　　处：《吉林建筑工程学院学报》2012年第3期16-20,共5页Journal of Jilin Architectural and Civil Engineering

摘　　要：将桥墩模拟成平面杆单元,在弯矩-曲率简化模型中忽略下降段,用刚度双分量模型来替代.根据钢筋混凝土构件截面受力变形平截面假定和钢筋与混凝土材料的本构关系,推导了构件截面内力计算公式,提出了数值计算的方法和步骤,利用FORTRAN语言编制了求解构件截面M-φ曲线的程序.最后应用程序对一桥墩截面进行了计算,得出了桥墩截面的M-φ曲线及简化的M-φ曲线.与以往通过实验获取构件M-φ曲线相比,该方法经济有效,具有实用价值.Bridge piers are emulated as plane beam element and two component model of stiffness is used with descending branch omitted in moment - curvature model. According to section deformation of reinforced concrete plane -section assumption and constitutive relation of reinforced - concrete materials internal force calculation formula derivation component section, and thereby a numerical calculation methods and procedures are put forward. The pro- grams are made to calculate the moment - curvature of the sections, using the FORTRAN language. Finally the papers obtained the moment - curvature of a bridge example and the simplified curve used to calculation of piers with the application of the programs. This is an economical and effective way compared to experiments, having practical value.

关 键 词：抗震分析 曲线 桥墩 

分 类 号：U443[建筑科学—桥梁与隧道工程]