减隔震技术在山区桥梁设计中的应用

Application of Seismic Isolation Technology in Mountain Bridge Design

结合山区公路桥梁特殊情况,综合分析现有抗震措施对山区桥梁设计的影响,从而说明减隔震技术在山区桥梁抗震措施中的重要地位。简要说明了高阻尼支座、摩擦摆支座及弹塑性钢挡块工作原理,并通过数值模拟对三种减隔震措施结果进行比较,综合评价三种常见减隔震措施在山区中小跨径桥梁的优劣,比较得出弹塑性钢挡块更适用于山区中小跨径预制梁桥。

Combined with the special situation of mountain highway-bridges,the effect on the available seismic measures are comprehensively analyzed,and the importance of the seismic isolation technology in mountain bridge is explained.The working principle of the high damping bearings,the spherical and cylindrical bearings,and the elastoplastic steel retainer is introduced briefly,the result of the three seismic isolation technologies is also compared by numerical method.With the assessment of the three seismic isolation technologies in Small and Medium-span mountain briges,the elastoplastic steel retainer works on.