大跨刚构-斜拉组合桥三重非线性地震响应分析

Triple Nonlinear Earthquake Response Analysis of Long-span Rigid-Frame-Cable-Stayed Composite Bridge

刚构-斜拉组合梁桥为新型组合桥梁结构,非线性抗震分析参考资料较少,本文以某刚构-斜拉组合梁桥为例,给出了结构抗震及隔震非线性行为的分析方法,引入钢筋混凝土压弯构件武田三线性骨架曲线恢复力模型,运用Fortran语言编制了钢筋混凝土的N-M-φ关系曲线计算程序,编程计算出钢筋混凝土的N-M-φ关系曲线,在考虑桩土耦合作用的基础上进行了刚构-斜拉组合桥的弹塑性、几何非线性及边界非线性地震响应分析,其分析结果为同类桥梁的抗震设计提供了参考。

Rigid-Frame-Cable-Stayed Composite Bridge is one kind of new type combination structure. It has less nonlinear analysis literature. Take one Rigid-Frame-Cable-Stayed Composite Bridge for example. The analysis method of nonlinear behavior is given, Introducting of Takeda Tri-linear restoring force model skeleton curve about reinforced concrete bending component, the procedures of reinforced concrete N-M-φ curves is prepared. The reinforced concrete N-M-φ curves is calculated, and has completed elastoplastic, geometric nonlinear and border nonlinear analysis. Rresearch results have certain reference role to the seismic design of its similar bridge.