地震作用后钢筋混凝土框架结构恢复性模拟研究
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摘要
钢筋混凝土框架结构在地震冲击后,其刚体退化特性复杂,存在模拟时结果失真明显的问题。为此,在考虑刚度退化规律的基础上进行分析模拟,研究地震冲击下钢筋混凝土框架结构的恢复性。提取地震作用下钢筋混凝土框架结构滞回曲线,通过有限元分析获取不同的特征点,形成恢复力模型的骨架曲线;依据恢复力模型骨架曲线和刚度退化规律,构建滞回曲线,模拟地震作用后钢筋混凝土框架结构恢复过程。在模拟的钢筋混凝土框架结构恢复实验中,层间位移结果低于5 mm、层间绝对加速度和柱底抬升结果的误差均低于0.1 mm;模拟得到结构的弯矩缝隙都能够实现闭合,钢筋混凝土结构未出现屈服现象,说明模拟的结果较好。
After an earthquake shock, reinforced concrete frame structures feature complex stiffness degradation, and the simulation results are considerably distorted. Therefore, analysis and simulation were performed considering the stiffness degradation law to study the resilience of a reinforced concrete frame structure under earthquake impact. The hysteretic curve of the reinforced concrete frame structure under earthquake was extracted, and different characteristic points were obtained via finite element analysis to form the skeleton curve of restoring force model. According to the skeleton curve and stiffness degradation rule of the restoring force model, the hysteretic curve was constructed to simulate the restoration process of the reinforced concrete frame structure after the earthquake. The restoration experiment simulation results of the reinforced concrete frame structure showed that the story drift was less than 5 mm, and the errors of absolute story acceleration and column bottom lifting were both less than 0.1 mm. The bending moment gap could be closed, and there was no yield phenomenon in the structure, indicating that the simulation results are reasonable.
After an earthquake shock, reinforced concrete frame structures feature complex stiffness degradation, and the simulation results are considerably distorted. Therefore, analysis and simulation were performed considering the stiffness degradation law to study the resilience of a reinforced concrete frame structure under earthquake impact. The hysteretic curve of the reinforced concrete frame structure under earthquake was extracted, and different characteristic points were obtained via finite element analysis to form the skeleton curve of restoring force model. According to the skeleton curve and stiffness degradation rule of the restoring force model, the hysteretic curve was constructed to simulate the restoration process of the reinforced concrete frame structure after the earthquake. The restoration experiment simulation results of the reinforced concrete frame structure showed that the story drift was less than 5 mm, and the errors of absolute story acceleration and column bottom lifting were both less than 0.1 mm. The bending moment gap could be closed, and there was no yield phenomenon in the structure, indicating that the simulation results are reasonable.
引文
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[2] 骆欢,杜轲,孙景江,等.地震作用下钢筋混凝土框架结构倒塌全过程振动台试验研究[J].建筑结构学报,2017,38(12):49-56.LUO Huan,DU Ke,SUN Jingjiang,et al.Shaking Table Test on Complete Collapse Process of RC Frame Structure Subjected to Earthquake[J].Journal of Building Structures ,2017,38(12):49-56.
[3] 徐龙河,樊晓伟,代长顺,等.预压弹簧自恢复耗能支撑受力性能分析与试验研究[J].建筑结构学报,2016,37(9):142-148.XU Longhe,FAN Xiaowei,DAI Changshun,et al.Mechanical Behavior Analysis and Experimental Study on Pre-pressed Spring Self-centering Energy Dissipation Brace[J].Journal of Building Structures,2016,37(9):142-148.
[4] 张鹏,曹瑞丹,邓宇,等.低周反复荷载下CFRP-PCPs复合筋混凝土梁的恢复力模型[J].建筑科学,2016,32(9):19-24.ZHANG Peng,CAO Ruidan,DENG Yu,et al.Restoring Force Model of CFRP-PCPs Composite Reinforced Concrete Beam under Low Reversed Cyclic Loading[J].Building Science,2016,32(9):19-24.
[5] 郭健,黄频,冷巧娟,等.方钢管钢骨混凝土柱与钢梁端板螺栓连接节点恢复力模型研究[J].工业建筑,2016,46(7):173-177.GUO Jian,HUANG Pin,LENG Qiaojuan,et al.Research on Restoring Force Model of Steel-Reinforced Concrete Square Column and Steel Beam Joint with Bolted End-Plate[J].Industrial Construction,2016,46(7):173-177.
[6] 刘文洋,李国强.屈曲约束钢板墙-钢筋混凝土框架结构滞回性能试验研究[J].建筑结构学报,2018,39(5):27-35.LIU Wenyang,LI Guoqiang.Experimental Study on Hysteretic Performance of Reinforced Concrete Frame with Buckling Restrained Steel Plate Shear Wall[J].Journal of Building Structures,2018,39(5):27-35.
[7] 王艳云,叶献国,蒋庆,等.基于性能的钢筋混凝土框架结构震后损失评估[J].工程抗震与加固改造,2016,38(5):16-20.WANG Yanyun,YE Xianguo,JIANG Qing,et al.Performance-based Seismic Loss Assessment in RC Structure[J].Earthquake Resistant Engineering and Retrofitting,2016,38(5):16-20.
[8] BERTOLINI L,CARSANA M,GASTALDI M,et al.Corrosion Assessment and Restoration Strategies of Reinforced Concrete Buildings of the Cultural Heritage[J].Materials & Corrosion,2015,62(2):146-154.
[9] 刘科元,李海滨.地震引起建筑结构损伤可靠性预测仿真[J].计算机仿真,2017,34(1):423-426.LIU Keyuan,LI Haibin.Prediction and Simulation of Damage Reliability of Building Structure Caused by Earthquake[J].Computer Simulation,2017,34(1):423-426.
[10] 张艳霞,张贺昕,刘安然,等.可恢复功能的装配式预应力钢框架性能化设计研究[J].建筑钢结构进展,2017,19(4):1-9.ZHANG Yanxia,ZHANG Hexin,LIU Anran,et al.Performance-Based Design Research of Resilient Prefabricated Prestressed Steel Frames[J].Progress in Steel Building Structures,2017,19(4):1-9.
[11] 徐再楼.混凝土组合剪力墙结构建筑倒塌过程的模拟与防倒塌设计[J].建筑技术,2017,48(1):74-76.XU Zailou.Simulation and Anti Collapse Design of Concrete Composite Shear Wall Structure[J].Architecture Technology,2017,48(1):74-76.
[12] 王朋,史庆轩,王峰,等.罕遇地震作用下型钢混凝土框架-钢筋混凝土核心筒结构耗能及损伤模式研究[J].工业建筑,2015,45(8):91-98.WANG Peng,SHI Qingxuan,WANG Feng,et al.Study of Mode of Energy Dissipation and Damage of Sre Frame-Rc Core Wall Structures under Strong Earthquake Actions[J].Industrial Construction,2015,45(8):91-98.