国内外钢筋混凝土桥墩地震作用下抗剪计算方法对比

为了探讨国内外钢筋混凝土桥墩在地震作用下抗剪计算方法的不同,对比分析了国内外公路和铁路桥梁抗震设计规范相关条款.通过有限元截面应力分析软件Xtract对6组钢筋混凝土桥墩模型进行了计算分析.结果表明：相对于实测值,7种规范关于钢筋和混凝土共同提供的抗剪能力计算值是安全可靠的.建议墩柱的计算宽度应采用核心混凝土尺寸,不应单纯地以一个保守定值来衡量位移延性及轴向压力对混凝土抗剪能力的影响,应动态地把这两个因素考虑进去.

Contrast and analysis of shearing resistance calculation of reinforced concrete pier under geological process at home and abroad

To investigate the differences of shearing resistance calculation method at home and abroad,a contrastive analysis of bridge seismic oodes is carried out in this paper.Computational analysis is implemented for six group reinforced concrete bridge models by using finite element sectional stress analysis software Xtract.The results show seven group calculated values of shear-bearing capacity by using seven codes are safe and reliable compared to measured values.It is suggested that the width of core concrete should be taken as the molded breadth of bridge pier,the effects of displacement ductility and axial force shouldn＇ t be measured by using a conservative constant merely,these two factors should be considered dynamically into the shearing resistance calculation.