摘要
本文建立了梁墩空间耦联体系模型，计算机模拟了列车通过某高墩、大跨度预应力混凝土连续箱梁桥的全过程，分析了该桥的横向振动特性和横向刚度。研究结果表明，如该桥箱梁横向宽度由５．２ｍ减小为４．０ｍ，在列车荷载作用下，该桥仍具有足够的横向刚度，且仍然能保证列车运行安全和具有良好的运行平稳性。
In this paper, the calculation model of girder-pier system isproposed.The whole process of a train’s passing the bridge is simulated bythe computer. The latcral dynamic characteristics and stiffness of the bridgeare analvsed.The result of the research indicates that if the lateral widthof the box-girder varies from 5.2m in the initial design to 4.0m, the lateral stiffness of the bridge is still enough under living loads and trains can runon the bnidge safely and smoothly.
关键词
高桥墩
连续梁
箱梁桥
结构稳定性
high piers, continuous beams, box girder bridges,bridge testing, vehicle-bridge interaction, lateral vibration, struc-tural stability
