铰接摇轴支座多用于跨度在20m～32m的铁路桥梁，近年发现一些支座在使用过程中出现病害，主要表现为活动支座的铰轴横向移位，并由此导致部分支座的部件在铰轴的横向顶推挤压下发生破坏而失去约束功能，为铁路桥梁的运营埋下安全隐患，需要对病害支座进行复位。本文对病害支座进行了数值计算和试验研究，通过车桥耦合计算得到横向力最大为160kN，通过支座仿真计算，发生横向移位需要139kN的横向作用力，现场实测铰轴复位需要190~210kN的水平力，既解释了病害发生的原因，也说明了铰轴复位的可能性。根据计算和试验结果开发了一套简单易行的铰轴大刚度横向自动复位装置，可根治铰轴横向移位病害，并且该装置在列车运营时即可安装，对铁路运营无影响。
Abstract
The Hinged Rocker bearings are used on railway bridge at 20m ~ 32m, in recent years, some bearings appear hazards while using, mainly resulting bearing’s axial endplay or channeling which make parts of the bearing out of work under the transversal force , and leave security risk to the operate of the railway bridge, urgent needed to be reset. In this paper, numerical calculation and experimental study are done. By coupling vehicle-bridge vibration analysis, the maximum of transverse force of the bearing is 160kN, and by finite element analysis, bearing’s axial endplay need the transverse force to be 139kN, and by in-site testing, bearing’s axial reset need the transverse force to be 190kN~210kN，which explain the cause of the hazard occurs, also suggest that the possibility of bearing’s axial reset. According to the results of calculation and experiment, a simple high rigidity axial endplay automatic reset equipment is introduced to eradicate the hazards ,and the equipment can be installed at the time of operation of railway without adverse effect.
关键词
摇轴支座 /
横向移位 /
自动复位装置
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Key words
hinged rocker bearing /
axial endplay /
automatic reset equipment
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参考文献
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