【摘要】 钢管混凝土刚性系杆拱桥抗震设计中由于跨度大和简支特点对支座要求很高。以某下承式钢管混凝土刚性系杆拱桥为工程背景,探讨了弹塑性防落梁球型钢支座在该桥抗震设计时的减隔震效果。分析结果表明,以E1地震波作用下的固定支座受力情况为依据,选取的减隔震支座参数合理;安装该减隔震支座后,桥梁下部结构在罕遇地震波作用下关键截面剪力减小比例为22.88%～35.54%,弯矩减小比例为18.73%～32.14%,该支座减隔震效果良好。更多还原

【Abstract】 In the seismic design of concrete filled steel tubular(CFST) rigid tied arch bridge,high performances for bearing are required due to the features of large span and simply supported type.Taking a CFST rigid tied bridge as an example,we explore the isolation effect of the elastic-plastic falling prevention ball steel bearings,the results indicate that the bearing parameters can be chosen reasonably based on the response of the constant bearing under the E1 level and the shear reduces to 22.88%～35.54%,the bend reduces to 18.73%～32.14%.更多还原