摘要
为讨论RC桥墩震后残余位移模拟的建模方法,采用Open Sees非线性纤维梁柱单元和零长度转动弹簧单元,建立了桥墩抗震分析模型。以1个足尺RC桥墩振动台试验结果为依据,对桥墩进行动力时程分析和静力滞回性能模拟。结果表明,纤维梁柱单元数量、转动弹簧单元极限滑移量S_u、刚度折减系数b、调整纵筋失效循环次数的延性系数C_f和强度降低系数C_d对残余位移模拟的影响不明显。纵筋滞回关系调整参数R_0和转动弹簧单元捏缩系数R对残余位移模拟结果影响较大,初步识别结果为15和1.0。考虑混凝土抗拉的Concrete 02模型模拟残余位移精度高于Concrete 01模型,考虑纵筋的屈曲GA模型模拟的桥墩残余位移明显偏小。
To investigate the modeling method for post-earthquake residual displacements of reinforced concrete（ RC）bridge piers,Piers＇ aseismic analysis models were built using nonlinear fiber beam column elements and zero length rotating spring elements of the software Open Sees. A pier ＇s dynamic time history analysis and static hysteretic performance simulation were done based on shaking table test results of a full-scale RC bridge pier. Results showed that effects of the number of fiber beam column elements,the ultimate slip displacement S_u and stiffness reduction coefficient b of rotating spring elements,the ductility constant C_f and strength reduction constant C_d for adjusting longitudinal reinforcements＇ cycle number until their failure on the simulated results of pier＇s residual displacements are not obvious; effects of the adjusting parameter R_0 for the longitudinal reinforcements＇ hysteretic performance and the dodecation coefficient R of rotating spring elements on the simulated results of residual displacements are larger,the preliminary identified values for R_0 and R are 15 and 1. 0,respectively; the concrete 02 model considering concrete tension has a higher simulation accuracy for residual displacements than the concrete 01 model does,while the pier ＇s residual displacements simulated with the GA model considering buckling of longitudinal reinforcement are obviously smaller than test data.
作者
赵泰儀
孙治国
王东升
周英武
ZHAO Taiyi1, SUN Zhiguo1,2, WANG Dongsheng1, ZHOU Yingwu3(1. Institute of Road and Bridge Engineering, Dalian Maritime University, Dalian 116026, China; 2. School of Civil Engineering, Institute of Disaster Prevention, Beijing 101601, China; 3. Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518060, Chin)
出处
《振动与冲击》
EI
CSCD
北大核心
2018年第15期251-260,共10页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(51678150)
地震科技星火计划攻关项目(XH17064)
广东省滨海土木工程耐久性重点实验室开放基金项目(GDDCE16-04)
关键词
桥梁抗震
桥墩残余位移
数值模拟
OPENSEES
参数敏感性分析
aseismic design of bridges
residual displacements of bridge piers
numerical simulation
OpenSees
parametric sensitivity analysis
作者简介
赵泰儒男，硕士生，1992年生;通信作者孙治国男，博士，副研究员，1980年生
