摘要
为提高装配式钢筋混凝土框架抗震能力,提出带竖缝混凝土墙的装配式消能减震框架结构体系。通过1个消能子结构试件的低周反复加载试验,考察消能子结构和竖缝混凝土墙设计方法的合理性,分析试件破坏模式、滞回性能、承载力、延性、抗侧刚度及变形特征等。通过有限元分析竖缝混凝土墙的抗震性能,研究带竖缝混凝土墙的装配式框架消能子结构的受力机理。结果表明:罕遇地震作用下,消能子结构中梁柱轻微损伤,梁柱节点及齿槽连接区钢筋基本保持弹性,结构损伤主要集中于竖缝混凝土墙;消能子结构的极限位移角为1/30,位移延性系数为3.25,变形和耗能能力良好;消能子结构弹性抗侧刚度理论值与试验值相对误差为10.4%;竖缝混凝土墙模拟和规范计算得到的极限位移和特征点荷载吻合较好;竖缝混凝土墙对实体墙两端梁截面产生附加阻尼力,缝间墙斜撑作用使其外侧和中间墙肢发生差异性破坏。建议带竖缝混凝土墙的装配式框架消能子结构在多遇和罕遇地震作用下的层间位移角限值分别按1/800和1/100控制;竖缝混凝土墙设计时应考虑斜撑作用,按压弯剪复合受力进行设计,并加强外侧缝间墙墙肢抗剪配筋构造。
In order to improve the seismic behavior of prefabricated reinforced concrete(RC)frame structure,the energy-dissipative prefabricated RC frame structure with vertically slitted RC walls(VSCW)was proposed.An energy dissipative substructure was tested under low-cycle reversed loading to investigate the feasibility of the design methods for energy dissipative substructure and VSCW.The failure mode,hysteretic behavior,strength,structural ductility,lateral stiffness and deformation characteristic were analyzed.Furthermore,the seismic performance of VSCW was analyzed by the finite element analysis,and the mechanical behavior of energy dissipative substructure was investigated.The results indicate that the structural damage is mainly concentrated on the slited wall(SW)under rare earthquake,while the beams and columns only have slight damages,and the beam-column connections and steel reinforcements of alveolar connection region basically remain elastic.The ultimate drift ratio of tested substructure specimen is 1/30,and the displacement ductility coeficient is 3.25,indicting the specimen has favorable deformation capacity and energy dissipation capacity.The relative error between the theoretical and tested lateral stiffness of energy dissipative substructure is 10.4%.The ultimate displacement and characteristic load obtained from simulation and code are in good agreement.The additional damping force on beam sections at both ends of solid walls of VSCW,and different failure modes are observed between either side limbs and middle limbs caused by the diagonal struct of SW.The inter-story drift ratio limits of the energy dissipative substructure with SCW under frequent and rare earthquakes are suggested to be controlled by 1/800 and 1/100,respectively.Moreover,the effects of diagonal struct should be taken into consideration in the design process of SCW,and the impact of compression-bending-shear loads is also suggested to be considered for analysis.In addition,the transverse reinforcement measures need to be strengthened for SW limbs on either side.
作者
张锡治
李星乾
章少华
张天鹤
王涛
黄世敏
Zhang Xizhi;Li Xingqian;Zhang Shaohua;Zhang Tianhe;Wang Tao;Huang Shimin(Tianjin University Research Institute of Architectural Design and Urban Planning Co.,Ltd.,Tianjin 300073,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,CEA,Harbin 150080,China;China Academy of Building Research,Beijing 100013,China)
出处
《土木工程学报》
EI
CSCD
北大核心
2023年第5期32-46,共15页
China Civil Engineering Journal
基金
国家自然科学基金(51578369)
天津市科技计划项目(19YDLYSN00120)。
关键词
装配式钢筋混凝土框架
消能子结构
竖缝混凝土墙
拟静力试验
抗震性能
受力机理
prefabricated RC frame structure
energy dissipation substructure
vertically slited RC wall
quasi-static test
seismic behavior
mechanical performance
