Experimental Research on Seismic Performance of Modular Prefabricated Steel- Reinforced Concrete Column to Steel Beam Composite Joints
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摘要: 提出了一种适用于建筑工业化的模块化组合节点,以梁-柱-节点核心区分离、模块化预制的理念设计了3个基础试件,通过拟静力试验,获得了不同梁柱线刚度比(ki)时各节点的破坏过程、破坏特征,分析了节点的滞回曲线、骨架曲线、延性耗能及刚度退化等抗震性能。结果表明:随着ki值的增大,节点呈现出由梁端受弯向节点剪切、柱端压弯的破坏模式发展,且经历了弹性、弹塑性和破坏三个阶段。节点的滞回曲线饱满,骨架曲线均呈"S"型,节点的整体刚度退化性能稳定,其平均延性系数在3.71~4.25之间,极限转角在0.0646~0.0760 rad之间,平均等效黏滞阻尼系数在0.32~0.33之间,节点表现出良好的力学性能和滞回特性。梁柱线刚度比对纵向钢筋和混凝土的应变影响较大,而对H型钢骨、钢梁腹板和翼缘连接板的应变影响较小;节点核心区受剪机理与"斜压杆"基本一致。Abstract: A modular composite joint suitable for the industrialization of buildings was proposed. Three basic specimens were designed with the concept of beam-column-joint core area separation and modular prefabrication. Through the quasi-static test, the failure process and failure characteristics of each joint with different beam-to-column liner stiffness ratios (ki) were obtained. The seismic performance of joints such as hysteresis curve, skeleton curve, ductility, energy consumption, and stiffness degradation were analyzed. The results showed that with the increase of ki value, the failure mode of the joints developed from beam-end bending to joint shear and column-end compression bending, and had experienced three stages of elasticity, elastoplasticity, and failure. The hysteresis curve of the joints was full, and the skeleton curve was in the shape of 'S’. The overall stiffness degradation performance of the joints was stable, the mean ductility coefficients were in the range of 3.71-4.25, the limit rotation angles were in the range of 0.064 6-0.076 0 rad, and the mean equivalent viscous damping coefficients were in the range of 0.32-0.33, and the joints showed good mechanical and hysteretic properties. The beam-to-column linear stiffness ratio had a greater impact on the strain of longitudinal reinforcement and concrete but had a smaller impact on the strain of H-shaped steel skeleton, steel beam webs, and flange connecting plates. The shear mechanism of the joint core area was consistent with that of the 'oblique strut’.
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[1] CHANG Y,LI X,MASANET E,et al.Unlocking the green opportunity for prefabricated buildings and construction in China[J].Resour Conserv Recy,2018,139:259-261. [2] 吴刚,冯德成.装配式混凝土框架节点基本性能研究进展[J].建筑结构学报,2018,39(2):1-16. [3] 郝际平,孙晓岭,薛强,等.绿色装配式钢结构建筑体系研究与应用[J].工程力学,2017,34(1):1-13. [4] LENG Y B,XU Q F,HARRIES K A,et al.Experimental study on mechanical properties of laminated bamboo beam-to-column connections[J].Engineering Structures,2020,210.http://doi.org/10.1016/j.engstruct.2020.110305. [5] GHAYEB H H,RAZAK H A,RAMLI SULONG N H.Development and testing of hybrid precast concrete beam-to-column connections under cyclic loading[J].Construction and Building Materials,2017,151:258-278. [6] 牟犇,陈功梅,张春巍,等.带外加强环不等高梁-钢管混凝土柱组合节点抗震性能试验研究[J].建筑结构学报,2017,38(5):77-84. [7] YUKSEL E,KARADOGAN H F,BAL I E,et al.Seismic behavior of two exterior beam-column connections made of normal-strength concrete developed for precast construction[J].Engineering Structures,2015,99(9):157-172. [8] HUANG Y,MAZZAROLO E,BRISEGHELLA B,et al.Experimental and numerical investigation of the cyclic behaviour of an innovative prefabricated beam-to-column joint[J].Engineering Structures,2017,150(1):373-389. [9] NZABONIMPA J D,HONG W K,PARK S C.Experimental investigation of dry mechanical beam-column joints for precast concrete based frames[J].The Structural Design of Tall and Special Buildings,2017,26(1).DOI: 10.1002/tal.1302. [10] WANG H S,BARBAGALLO F,PAN P.Test of precast pre-stressed beam-to-column joint with damage-free reinforced concrete slab[J].Engineering Structures,2020,210.http://doi.org/10.1016/j.engstruct.2020.110368. [11] ZHANG A L,ZHANG H,JING Z Q,et al.Low cycle reciprocating tests of earthquake-resilient prefabricated column-flange beam-column joints with different connection forms[J].Journal of Constructional Steel Research,2020,164(1).http://doi.org/10.1016/j.jcsr.2019.105771. [12] 刘学春,杨志炜,王鹤翔,等.螺栓装配多高层钢结构梁柱连接抗震性能研究[J].建筑结构学报,2017,38(6):34-42. [13] ELSANADEDY H M,AL-SALLOUM Y A,ALRUBAIDI M A,et al.Upgrading of precast RC beam-column joints using innovative FRP/steel hybrid technique for progressive collapse prevention[J].Construction and Building Materials,2021,268.http://doi.org/10.1016/j.conbuildmat.2020.121130. [14] 李威.圆钢管混凝土柱-钢梁外环板式框架节点抗震性能研究[D].北京:清华大学,2011. [15] 中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB 50010-2010[S].北京:中国建筑工业出版社,2010. [16] 福建省住房和城乡建设厅.钢管混凝土结构技术规程:DBJ/T13-51-2010[S].福州:福建省住房和城乡建设厅,2010. [17] 中华人民共和国住房和城乡建设部.混凝土物理力学性能试验方法标:GB/T 50081-2019[S].北京:中国建筑工业出版社,2019. [18] 中华人民共和国国家质量监督检验检疫总局.金属材料拉伸试验第1部分:室温试验方法:GB/T 228.1-2010[S].北京:中国标准出版社,2011. [19] SHI Y J,SHI G,WANG Y Q.Experimental and theoretical analysis of the moment-rotation behaviour of stiffened extended end-plate connections[J].Journal of Constructional Steel Research,2007,63(9):1279-1293. [20] 中华人民共和国住房和城乡建设部.建筑抗震试验规程:JGJ/T 101-2015[S].北京:中国建筑工业出版社,2015. [21] 中华人民共和国住房和城乡建设部.建筑抗震设计规范:GB 50011-2010[S].北京:中国建筑工业出版社,2010. [22] FEMA-350.Recommended seismic design criteria for new steel moment-frame buildings[S].Washington:Building Seismic Safety Council for the Federal Emergency Management Agency,2000. [23] 梁柱节点专题组.劲性钢筋混凝土梁柱节点受力性能及受剪承载力:混凝土结构研究报告选集(3)[M].北京:中国建筑工业出版社,1994. [24] 赵鸿铁.钢与混凝土组合结构[M].北京:科学出版社,2005.
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