新型装配式自复位桥墩节点抗震性能研究  

Research on seismic behavior of a new type fabricated self-centering joint

作　　者：申彦利[1,2] 郭梦强 袁宏博 Shen Yan-li;Guo Meng-qiang;Yuan Hong-bi(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;Hebei Provincial Research Center of Assembly Structural Engineering Technology,Handan 056038,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]河北省装配式结构工程技术研究中心,河北邯郸056038

出　　处：《工程抗震与加固改造》2021年第6期65-73,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金资助项目(51378169);河北省高等学校科学技术研究重点项目(ZD2016147)。

摘　　要：为提高装配式桥墩的自复位能力和耗能性能,提出了一种新型装配式自复位桥墩节点连接,采用数值模拟的方法建立了桥墩节点的数值模型,在验证数值模型正确性基础上,通过对比各桥墩模型在低周往复荷载下的模拟结果,研究新型节点的抗震性能。结果表明:相比传统桥墩节点,新型桥墩节点的滞回曲线更加饱满,承载力和耗能能力有所提升,且残余位移减小,自复位性能较好;随着橡胶厚度的增加,结构的耗能能力逐渐增强,残余位移逐渐减小,两者趋势都随橡胶厚度加大呈下降状态,且橡胶厚度为40 mm时抗震性能最佳;随着桥墩埋置深度的增加,结构的承载力有所提升,但耗能能力有所减小,且埋置深度为100mm时残余位移较小,呈现出更好的自复位性能。In order to improve the self-resetting ability and energy dissipation performance of the prefabricated piers, a new type of self-centering joints is proposed in the article. The numerical simulation is used to establish the numerical model of the pier joints. On the basis of verifying the correctness of the numerical model, the seismic performance of the new joint is studied by comparing the simulation results of each pier model under low cyclic reciprocating load. The results show that compared to the traditional pier joint, the hysteretic curves of the new pier joints are more full, the bearing capacity and energy dissipation capacity are improved, the residual displacement is reduced, the self-reset performance is better. As the rubber thickens, the energy dissipation capacity of the structure increases, and the residual displacement decreases gradually. Both trends decrease with the increase of rubber thickness, and the seismic performance is best when the rubber thickness is 40 mm. With the increase of the buried depth of the pier, the bearing capacity of the structure is increased, but the energy dissipation capacity is decreased. When the buried depth is 100 mm, the residual displacement of the structure is the smallest and self-reset performance is better.

关 键 词：抗震性能 自复位桥墩 数值模拟 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]