摇摆-自复位桥墩的多弹簧模型建模方法研究  

Simulation method for multi-spring model of rocking self-centering pier

作　　者：钟正午 石岩[1] 秦洪果 成昭 张胶玲 ZHONG Zhengwu;SHI Yan;QIN Hongguo;CHENG Zhao;ZHANG Jiaoling(School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China)

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《世界地震工程》2021年第4期197-205,共9页World Earthquake Engineering

基　　金：国家自然科学基金(51768042,51908265);兰州理工大学红柳优青资助项目(04-061810)。

摘　　要：为探讨摇摆-自复位(Rocking Self-Centering,RSC)桥墩的滞回行为并为其数值建模提供依据,基于OpenSees地震分析平台发展此类结构的多弹簧模型并开展系统性讨论。结合RSC桥墩的构造特点发展多弹簧模型的整体建模思路,着重对比三种弹簧分布(基于Gauss积分和Lobatto积分的分布及均匀分布)模式下RSC桥墩的整体力-位移响应,对弹簧所需设置个数进行优化分析,并讨论了弹簧刚度的校准过程。最后,基于现有研究的5个RSC桥墩试件的试验结果,通过对比滞回曲线,发现所建议的模拟方法可较为准确地模拟RSC桥墩在拟静力荷载下的刚度、强度、滞回行为及残余位移。To explore the seismic performance of rocking self-centering(RSC)pier,a systematic study on the multi-spring model of RSC pier was carried out in this paper,expecting to provide the basis forsimulation.According to the structural feature of RSC pier,the numerical modeling method for multi-spring model was developed,the force-displacement relation of RSC pier with three different distribution schemes including the Gauss-Integration,Lobatto-Integration distribution and uniform distributionwas compared,the required minimum number of springs was analyzed,and the calibration process of the spring stiffness was discussed.Finally,by comparing the simulation and test results of 5 RSC pierspecimens,it can be found that the proposed modeling strategy was able to simulate the stiffness,strength,hysteretic behavior and resident displacement of RSC pier under the cyclic load.

关 键 词：摇摆-自复位桥墩 多弹簧模型 模拟方法 OPENSEES 

分 类 号：TU318[建筑科学—结构工程]