采用榫卯剪力键的预应力装配式双柱桥墩拟静力分析  

Pseudo Static Analysis of Assembly Type Double Column Pier Based on ABAQUS

作　　者：包龙生 王贺鑫 汤维维[2] 张远宝 于玲 BAO Longsheng;WANG Hexin;TANG Weiwei;ZHANG Yuanbao;YU Ling(School of Transportation Engineering,Shenyang Jianzhu University,Shenyang,China,110168;Institute of Architectural Design,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学交通工程学院,辽宁沈阳110168 [2]沈阳建筑大学建筑设计研究院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2018年第4期692-702,共11页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51078242);辽宁省自然科学基金项目(201602602);住房和城乡建设部科学技术项目(2016-K2-012);沈阳市科学技术基金项目(F16-095-1-00)

摘　　要：目的探究地震的作用下预应力钢筋混凝土装配式双柱桥墩的力学性能及影响因素,分析钢筋混凝土双柱式桥墩的节点破坏机理.方法基于ABAQUS有限元软件进行装配式双柱桥墩结构的非线性数值模拟,分别依托实际工程设计整体现浇模型和采用剪力键的装配式双柱桥墩模型,研究结构在低周往复位移荷载作用下的抗震性能和桥墩节点处的破坏形式.结果预应力双柱墩与现浇模型破坏接近,破坏的损伤均集中在桥墩塑性铰处,现浇墩极限荷载为212.9 k N,预应力双柱墩极限荷载为245.1 k N,但预应力钢筋在混凝土达到屈服后,拥有较好的自复位性能,减小残余位移;榫卯剪力键较好地阻止了在荷载作用下的剪切滑移,使桥墩在受力方面存在冗余度和足够的抗侧刚度.结论榫卯剪力键可以提高装配式双柱桥墩的承载能力和整体性能,对装配式双柱桥墩的工程应用提供参考.The purpose of this paper is to investigate the mechanical properties and influencing factors of prestressed reinforced concrete prefabricated double column piers under the action of earthquake,and to analyze the joint failure mechanism of reinforced concrete double column piers.Based on ABAQUS finite element software,the nonlinear numerical simulation of double column pier structure is carried out. Based on the actual engineering design of cast-in-place model and as-sembled by shear bond double column pier model of structure under lowcycle to failure reset under load,the seismic performance of shift and the pier joints. Prestressed double column pier and cast-in-place failure model close to failure damage are concentrated in the plastic hinge at the pier,the pier cast-in-place ultimate load is 212. 9 k N,the prestressed double column pier ultimate load is245. 1 k N,but the prestressed steel bar in concrete yield,with self reset good performance and reduce the residual displacement. The tenon and mortise shear key can prevent the shear slip under the action of load,and make the pier have redundant force and enough lateral stiffness in the force.The mortise and tenon shear key can improve the bearing capacity of the assembled double column pier and overall performance of the model,which can provide reference for the engineering application of the prefabricated double column pier.

关 键 词：抗震性能 双柱式桥墩 拟静力方法 预应力节段拼装 剪力键 参数分析 

分 类 号：TU279.22[建筑科学—建筑设计及理论] U445.4[建筑科学—桥梁与隧道工程]