装配式钢筋混凝土拱桥立柱节点抗震性能研究  

Study on seismic behavior of upright column joints of prefabricated reinforced concrete arch bridges

作　　者：杨耿焱 杨建荣[1] 邓旭东 车文庆[3] YANG Gengyan;YANG Jianrong;DENG Xudong;CHE Wenqing(School of Architectural Engineering,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Highway Science and Technology Research Institute,Kunming 650051,China;Kunming Survey Design and Research Institute Co.Ltd.of CREEC,Kunming 650200,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500 [2]云南省公路科学技术研究院,云南昆明650051 [3]中铁二院昆明勘察设计研究院有限责任公司,云南昆明650200

出　　处：《四川建筑科学研究》2020年第2期16-24,共9页Sichuan Building Science

基　　金：国家重点研发计划(2017YFE0103000);云南省科技富民强县计划(2015EA002);云南省交通运输厅科技项目(云交科2016(A)02)。

摘　　要：对装配式钢筋混凝土拱桥立柱节点作低周反复加载数值模拟,进行了立柱节点足尺试验模型的拟静力试验,得出了模型在不同加载制度下加载点处的荷载与位移,进一步得到了滞回曲线、骨架曲线、能量耗散系数以及耗能滞回面积。经过对比数值模拟结果与拟静力试验数据,发现拟静力试验和数值模拟结果差距在15%以内,试验所得滞回曲线有强度退化的现象,数值模拟得到的滞回曲线相比试验得到的滞回曲线较饱满,具有较高承载力及一定的耗能能力。通过数值模拟与拟静力试验探究了立柱节点的破坏机制,从强度、变形和能量3个方面判断和鉴别出了结构的抗震性能,从而确定了装配式钢筋混凝土拱桥立柱节点的抗震指标和模型参数。The low-cycle repeated loading numerical simulation of the prefabricated reinforced concrete arch bridge column is carried out,and the quasi-static test of the full-scale test model of the column joint is carried out.The load and displacement of the model at the loading point under different loading regimes are obtained,and the hysteresis curve,skeleton curve,energy dissipation coefficient and energy consumption hysteresis area are further obtained.After comparing the numerical simulation results with the quasi-static test data,it is found that the difference between the quasi-static test and the numerical simulation results is within 15%,and the hysteresis curve obtained by the test has the phenomenon of strength degradation.The hysteresis curve obtained by numerical simulation is compared with the test.The hysteresis curve is fuller,with higher bearing capacity and certain energy consumption.Through the numerical simulation and quasi-static test,the failure mechanism of the column joint is explored,and the seismic performance of the structure is judged and identified from three aspects of strength,deformation and energy,so as to determine the seismic index and model parameters of the assembled reinforced concrete arch bridge column joint.

关 键 词：装配式钢筋混凝土拱桥 立柱节点 抗震性能 拟静力试验 数值模拟 

分 类 号：TU375[建筑科学—结构工程]