摘要
设计并制作了3根配置多重复合箍筋的钢筋混凝土柱,进行了低周反复荷载试验,基于Mander模型和修正Kent-Park模型建立了框架柱在不同约束条件下混凝土的本构模型,采用OpenSees对混凝土柱试件进行了有限元分析;通过与混凝土框架柱的试验结果对比,验证了多重复合箍筋约束的混凝土本构关系和框架柱建模的合理性,进一步建立了配置多重复合箍筋的钢筋混凝土复杂框架结构的有限元分析模型,并进行了时程反应分析。结果表明:3根多重复合箍筋约束混凝土柱的滞回曲线均呈较为饱满的弓形,表现出良好的塑性变形性能和耗能能力;有限元模拟结果中的峰值荷载与试验结果较为接近,滞回曲线形状与试验结果基本吻合,建立的有限元模型能较准确地分析该类复合配筋柱的受力性能;复杂框架结构的顶点位移在天津波作用下最大,在X,Y方向分别为341 mm和500 mm,结构整体位移角分别为1/120和1/82;最大层间位移角出现在框架结构第3层,在X方向和Y方向分别为1/66和1/57,均能够满足现行抗震设计规范要求;该钢筋混凝土框架结构的屈服顺序为梁端先于柱端发生屈服,实现了预期的"强柱弱梁"地震破坏机制。
Three reinforced concrete columns with multiple composite stirrups were designed and manufactured,and the reversed cyclic lateral loading tests were carried out.Based on Mander model and modified Kent-Park model,the constitutive model of concrete was established under different constraints and OpenSees software was used to perform the finite element analysis.Compared to the test results,it verified the constitutive relation of concrete with multiple composite stirrups and the rationality of frame column modeling.The finite element analysis model of reinforced concrete complex frame structure with multiple composite stirrups was established,and history response analysis was performed.The results show that the hysteretic curves of three groups of columns with multiple composite stirrups are relatively full bow-shaped,showing good plastic deformation behavior and energy dissipation capacity.The peak load of the finite element simulation results is close to the experimental results,and the shape of hysteretic curves agrees well with the experimental results.The finite element model can be used to accurately analyze the mechanical behaviors of this kind of composite reinforced columns.The peak displacements of complex frame structure are the largest under the action of Tianjin wave,which are 341 mm and 500 mm in the X and Y directions,respectively,and the angles of structure drift ratios are 1/120 and 1/82,respectively.The maximum inter-story drifts appear in the third layer,which are found to be 1/66 and 1/57 in X and Y directions,and can meet the demands of the seismic design code of buildings.The order of yielding for this reinforced concrete frame structure is from the beam-end to the column-end,which achieves the anticipated seismic failure characteristics of"strong column-weak beam"mechanism.
作者
邢国华
杨成雨
高志宏
黄永安
常召群
张贵海
吴涛
XING Guo-hua;YANG Cheng-yu;GAO Zhi-hong;HUANG Yong-an;CHANG Zhao-qun;ZHANG Gui-hai;WU Tao(School of Civil Engineering,Chang'an University,Xi'an 710061,Shaanxi,China;China Railway First Surver and Design Institute Group Co.・Ltd.,Xi'an 710043,Shaanxi,China)
出处
《建筑科学与工程学报》
CAS
北大核心
2020年第1期58-66,共9页
Journal of Architecture and Civil Engineering
基金
国家自然科学基金项目(51578077)
中铁第一勘察设计院集团公司科研项目(院科16-33)
作者简介
邢国华(1983-),男,内蒙古呼和浩特人,教授,博士研究生导师,工学博士,EGmail:ghxing@chd.edu.cn.
