【摘要】 首先对近三十年来国内外使用较广泛的减隔震装置进行了评述,并在此基础上介绍了一种新型减隔震支座——拉索减震支座(通过在盆式支座上增设限位拉索而成)及其设计要点,并通过支座的拟静力试验测定了不同竖向力工况下支座滞回曲线以及不锈钢板与聚四氟乙烯滑板之间的摩擦系数等。最后通过建立一座四跨连续组合箱梁桥有限元模型,并考虑不同场地条件的影响,对拉索减震支座的减震效果进行了分析。计算结果表明,拉索减震支座能有效减小桥梁结构地震响应,且对不同场地条件具有很好的适应性。更多还原

【Abstract】 Aseismic devices that are widely used in recent thirty years were evaluated firstly,then a new class of aseismic bearing,cable-sliding friction aseismic bearing(CSFAB),and its design characteristics were introduced,which combines ordinary pot rubber bearings with elastic cable devices located between the upper deck and the lower piers.The hysteretic behaviors and the friction coefficient between stainless steel plate and PTEE plate under different vertical loads were tested.Finally,a finite element model of four-span continuous composite box-girder bridge was established to analyze the seismic behavior of the bridge taking into account different site conditions.The results show that CSFAB can decrease the seismic responses of bridges in different site conditions.更多还原