摘要
针对轨道交通高架上铺设无缝线路的实际情况,建立了考虑桥上长钢轨对高架桥纵向约束作用的结构—桩基—土动力相互作用力学模型。计算分析了轨道交通高架的地震响应;重点探讨了高架桥上无缝线路对轨道交通高架桥抗震性能的影响。研究结果表明,桥上轨道结构对桥梁的纵向约束作用改善了高架桥的抗震性能,但其改善程度与钢轨扣件的纵向力学参数有关。
With dynamic analysis of the viaduct structure model including track structure, pile and soil, the article calculates the nonlinear seismic responses of mass transit viaducts, the influence of jointless tracks on the seismic performance of mass transit viaducts and argues that the longitudinal restraint effect of track structure on viaducts shall improve the seismic performance of viaducts, but the improvement may have something to do with longitudinal mechanics parameters of rail fastening.
出处
《城市轨道交通研究》
2002年第1期32-39,共8页
Urban Mass Transit
关键词
抗震性能
轨道交通
高架桥
无缝线路
rail transit, viaduct, jointless tracks, earthquake, rail fastening
