中南大学学报（自然科学版）2018，Vol.49Issue(4)：916-924,9.DOI:10.11817/j.issn.1672-7207.2018.04.020
考虑轨道约束的高铁简支梁桥横向地震碰撞效应
Transverse seismic pounding effect for simply-supported girder bridges of high-speed railway considering track constraint
摘要
Abstract
In order to accurately understand the limit function and earthquake mitigation effect of the transverse shear key of the high-speed railway simply-supported girder bridge during earthquake excitation, taking 5-span 32 m standard span simply-supported bridge as an example, a solid finite element model was established based on ABAQUS software. The effects of track constraint and shear key material nonlinearity on the transverse pounding finite element model were analyzed. The parameters of different seismic waves and different peak acceleration excitations, the initial gap between shear keys and bearing bases, the shear key strength and the thickness of the rubber cushion layer were analyzed. The results show that the track constraint will change the dynamic characteristics of the bridge structure and the seismic pounding effects, and shear key material nonlinearity significantly influences on the transverse pounding effects. Transverse pounding effects are significantly affected by different seismic waves and different peak accelerations. In EI-Centro seismic wave excitation and considering all the pounding effects, the initial gap with 3 cm of the high-speed railway simply-supported girder bridge between shear keys and bearing bases is reasonable. Rubber pads can reduce the transverse relative displacement of the pier and the girder and pounding force, and the effect of anti-collision is related to the thickness of the rubber cushion layer.关键词
高铁简支梁桥/轨道约束/地震/横向碰撞效应/挡块/橡胶缓冲垫层Key words
high-speed railway simply-supported bridge/track constraint/earthquake/transverse pounding effect/shear key/rubber cushion layer分类
交通工程引用本文复制引用
杨孟刚,孟栋梁,戴良缘..考虑轨道约束的高铁简支梁桥横向地震碰撞效应[J].中南大学学报（自然科学版）,2018,49(4):916-924,9.基金项目
国家自然科学基金资助项目(51378504,51308549)(Projects(51378504, 51308549) supported by the National Natural Science Foundation of China) （51378504,51308549）
