门式墩上高速铁路连续梁桥梁轨相互作用

采用非线性弹簧模拟梁轨接触,并用相关文献的试验数据对该模型进行了验证,在此基础上建立了考虑门式墩和桩基的高速铁路连续梁桥梁轨共同作用模型.以合福线上采用钢混组合门式墩结构的某连续梁桥为算例,比较了钢轨纵向力对不同下部结构的影响,探讨了纵向阻力模型、活载模式、梁柱节点刚度等因素对钢轨纵向力的影响.研究表明：门式墩梁柱节点刚度对轨道受力影响较小;采用门式墩支撑的连续梁桥的钢轨制动力将增大约22%,但其墩顶受力优于普通桥墩;当在风速较大的地区修建门式墩时,应考虑风荷载对钢轨纵向力的影响.

Track-beam interaction of high-speed railway continuous beam bridge on frame pier

The nonlinear springs were used to simulate the beam-track contact model and the experimental data of relevant references was used to validate the model.Then the beam-track interaction model of the continuous beam bridge on the high-speed railway considering the frame pier and pile foundation was established.Taking a continuous beam bridge of the frame pier on the Hefei-Fuzhou line as a case,impact of the rail longitudinal force on the different substructures was compared,and impact of the factors such as the longitudinal resistance model,live load model,and beam-column joint stiffness etc.on the rail longitudinal force was investigated.Studies show that the beam-column joint stiffness of the frame pier has less impact on the rail force;by using the continuous beam bridge of frame pier support,its rail braking force will increase by about 22%,but the pier-top stress is superior to ordinary pier;when constructing the frame pier in the windy areas,it should be considered that the wind load has an impact on the rail.