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通过在铅芯橡胶支座的两侧安装X型钢棒,形成有限位功能的铁路桥梁专用的双向隔震支座,有效限制中、小地震作用下支座的相对位移,保证中、小地震作用下轨道结构不发生破坏,以及列车运行的安全性。利用反应谱法设计铅芯橡胶支座和X型钢棒限位器,并采用ANSYS建立精细有限元模型,对铅芯橡胶支座双向隔震桥梁模型和采用新型双向隔震支座的桥梁模型进行地震时程响应的对比分析。分析结果表明,新型隔震支座在中、小地震下有效限制桥梁上部结构的位移,保护轨道结构不破坏,大震时具有较好的隔震减震效果。
By installing X-shaped steel bars on both sides of the lead-rubber bearing, a special bidirectional seismic isolation bearing for railway bridges with limited functions can be formed to effectively limit the relative displacement of the bearing under moderate and small earthquakes and ensure the medium and small earthquakes Under the track structure does not occur damage, as well as the safety of train operation. Design the lead rubber bearing and the X-shaped steel bar stopper by the response spectrum method, and use the ANSYS to establish the fine finite element model. The two-way seismic isolation bridge model of lead rubber bearing and the bridge model adopting the new two-way isolation bearing Comparison and Analysis of Earthquake Time History Response. The analysis results show that the new type of isolation bearing can effectively limit the displacement of the superstructure of the bridge under medium and small earthquakes, and protect the orbit structure from being destroyed.