方钢管混凝土柱-钢梁角钢连接节点抗震性能试验研究
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摘要
为了研究地震作用下方钢管混凝土柱-钢梁角钢连接节点的受力性能,设计了3个梁柱节点试件并对其进行低周往复循环荷载试验,分析了角钢短肢长肢比和角钢厚度对试件的刚度、承载力、耗能能力、延性性能及节点域剪切变形的影响。试验结果表明:角钢连接的塑性铰出现在角钢与柱壁相接触部位,往复荷载下最终破坏形态为角钢与柱壁焊接部位出现角钢撕裂现象,通过增加角钢短肢长肢比和增加角钢厚度可以将塑性铰外移,使角钢与柱壁相接触部位的撕裂程度减轻,从而有效保护节点核心区。增加角钢的厚度对节点的初始刚度及承载力影响明显,随着角钢厚度的增加,节点的初始刚度和承载力随之增加;增加角钢短肢长肢比能够提高节点的耗能能力和刚度。该节点具有较高的承载力、刚度及较大的变形能力,符合抗震设计理念。
In order to study the mechanical behavior of concrete-filled steel tubular column to steel beam angle joint under seismic action,three beam to column joint specimens were designed for a low cycle reversed load test,respectively. The influences of the ratio of the angle of short limb to long limb and the thickness of angle on the joint stiffness, loading capacity, energy dissipation capacity, ductility and shearing deformation of panel zone were analyzed. The experimental results show that the plastic hinge of angle joint appears at the contact point between the angle and the wall of the column,leading to tearing apart failure of angle at its welded connection to column wall under cyclic loading. Increasing the ratio of angle of short limb to long limb and angle thickness can be make the plastic hinge moved outwards,so as to protect the core zone of the joint effectively. With the increase of the angle thickness,initial rigidity and loading capacity of the specimens and the joints increase obviously. Increasing the ratio of angle of short limb to long limb can improve the energy dissipation capacity and stiffness of the specimens and the joints. The joints in this form have good strength,strong rigidity and large deformation capacity. The design of the joints conforms to the seismic design concept.
In order to study the mechanical behavior of concrete-filled steel tubular column to steel beam angle joint under seismic action,three beam to column joint specimens were designed for a low cycle reversed load test,respectively. The influences of the ratio of the angle of short limb to long limb and the thickness of angle on the joint stiffness, loading capacity, energy dissipation capacity, ductility and shearing deformation of panel zone were analyzed. The experimental results show that the plastic hinge of angle joint appears at the contact point between the angle and the wall of the column,leading to tearing apart failure of angle at its welded connection to column wall under cyclic loading. Increasing the ratio of angle of short limb to long limb and angle thickness can be make the plastic hinge moved outwards,so as to protect the core zone of the joint effectively. With the increase of the angle thickness,initial rigidity and loading capacity of the specimens and the joints increase obviously. Increasing the ratio of angle of short limb to long limb can improve the energy dissipation capacity and stiffness of the specimens and the joints. The joints in this form have good strength,strong rigidity and large deformation capacity. The design of the joints conforms to the seismic design concept.
引文
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[6]王先铁,郝际平,周观根.方钢管混凝土穿芯高强螺栓-端板节点滞回性能研究[J].建筑钢结构进展,2009,11(1):33-37.(WANG Xiantie,HAO Jiping,ZHOU Guangen.Study on hysteretic behavior of concrete filled square steel tubular through high strength bolt end plate connections[J].Progress of Building Steel Structure,2009,11(1):33-37.(in Chinese))
[7]于旭.新型方钢管混凝土柱-钢梁节点的试验研究[D].南京:南京工业大学,2003:47-49.(YU Xu.Experimental study of a new type of concrete-filled square steel tubular column to steel beam joint[D].Nanjing:Nanjing University of Technology,2003:47-49.(in Chinese))
[8]高占阳,李洪泉,王兆村.方钢管混凝土柱-H型钢梁连接节点的受力性能[J].世界地震工程,2015,31(1):180-186.(GAO Zhanyang,LI Hongquan,WANG Zhaocun.Mechanical performance of connection node between concrete filled square tubular column and H-steel beam[J].World Earthquake Engineering,2015,31(1):180-186.(in Chinese))
[9]王先铁,周绪红,宋文俊,等.方钢管混凝土框架-斜十字加劲薄钢板剪力墙低周反复荷载试验研究[J].西安建筑科技大学学报(自然科学版).2016,48(1):63-70.(WANG Xiantie,ZHOU Xuhong,SONG Wenjun,et al.Cyclic loading test study on concretefilled square steel tubular frame-diagonally cross stiffened thin steel plate shear walls[J].Journal of Xi’an University of Architecture and Technology(Natural Science Edition),2016,48(1):63-70.(in Chinese))
[10]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,2011:65-66.(LI Wei.Study on the seismic performance of circular concrete-filled steel tubular column to steel beam joint with external diaphragm[D].Beijing:Tsinghua University,2011:65-66.(in Chinese))
[11]AK Al-Rodan.T-cleat connection to concrete-filled tubular internal columns[J].Journal of Structural Engineering,ASCE,2004,130(5):725-731.
[12]RICLES J M,PENG S W,LU L W.Seismic behavior of com-posite concrete filled steel tube columella-wide flange be ammoment conncetions[J].Journal of Structural Engineering,ASCE,2004,130(2):223-232.
[13]STEPHEN P,SCHNEI M,KROPELNICKI J.Progressive collapse analysis of an RC structure[J].Structural Design of Tall and Special Buildings,2007,14(4):757-771.
[14]WANG Jingfeng,HAN Linhai,BRIAN Uy.Hysteretic behaviour of flush end plate joints to concrete-filled steel tubular columns[J].Journal of Constructional Steel Research,2009,65(8/9):1644-1663.
[15]徐嫚.钢管混凝土柱-钢梁节点拉弯性能及框架抗连续倒塌性能[D].哈尔滨:哈尔滨工业大学,2011:44-48.(XU Man.Tension-bending behavior of CFST column-steel beam connections and progressive collapse performance of frames[D].Harbin:Harbin Institute of Technology,2011:44-48.(in Chinese))
[16]唐九如.钢筋混凝土框架节点抗震[M].南京:东南大学出版社,1989:311-316.(TANG Jiuru.Earthquake resistant reinforced concrete frame joints[M].Nanjing:Southeast University Press,1989:311-316.(in Chinese))
[2]钟善桐,张文福,屠永清,吴学锋,梁建华.钢管混凝土结构抗震性能的研究[J].建筑钢结构进展,2002,4(2):3-15.(ZHONG Shantong,ZHANG Wenfu,TU Yongqing,WU Xuefeng,LIANG Jianhua.Study on seismic behavior of concrete filled steel tubular structures[J].Progress of Building Steel Structure,2002,4(2):3-15.(in Chinese))
[3]潘阳.方钢管混凝土梁柱穿芯螺栓-端板连接节点抗震性能研究[D].西安:西安建筑科技大学,2006:29-30.(PAN Yang.Study on seismic behavior of square steel tube concrete beam column through core bolt end plate connections[D].Xi’an:Xi’an University of Architecture and Technology,2006:29-30.(in Chinese))
[4]王超.矩形钢管混凝土柱-H型钢梁端板半刚性连接受弯性能研究[D].北京:北京工业大学,2007:37-38.(WANG Chao.Research of the end plate conjunction capability with moment of rectangular steel tubing concrete column-H beam[D].Beijing:Beijing University of Technology,2007:37-38.(in Chinese))
[5]潘阳,郝际平,王先铁,任青青.方钢管混凝土梁柱穿芯螺栓-端板连接节点承载力研究[C]//第七届全国现代结构工程学术研讨会论文集.天津:天津大学,2007:6.(PAN Yang,HAO Jiping,WANG Xiantie,REN Qingqing.Study on the load-carrying capacity of bolted end plate connections of concrete filled square steel tubular beams and columns[C]//Proceedings of the Seventh National Symposium on Modern Structural Engineering.Tianjin:Tianjin University,2007:6.(in Chinese))
[6]王先铁,郝际平,周观根.方钢管混凝土穿芯高强螺栓-端板节点滞回性能研究[J].建筑钢结构进展,2009,11(1):33-37.(WANG Xiantie,HAO Jiping,ZHOU Guangen.Study on hysteretic behavior of concrete filled square steel tubular through high strength bolt end plate connections[J].Progress of Building Steel Structure,2009,11(1):33-37.(in Chinese))
[7]于旭.新型方钢管混凝土柱-钢梁节点的试验研究[D].南京:南京工业大学,2003:47-49.(YU Xu.Experimental study of a new type of concrete-filled square steel tubular column to steel beam joint[D].Nanjing:Nanjing University of Technology,2003:47-49.(in Chinese))
[8]高占阳,李洪泉,王兆村.方钢管混凝土柱-H型钢梁连接节点的受力性能[J].世界地震工程,2015,31(1):180-186.(GAO Zhanyang,LI Hongquan,WANG Zhaocun.Mechanical performance of connection node between concrete filled square tubular column and H-steel beam[J].World Earthquake Engineering,2015,31(1):180-186.(in Chinese))
[9]王先铁,周绪红,宋文俊,等.方钢管混凝土框架-斜十字加劲薄钢板剪力墙低周反复荷载试验研究[J].西安建筑科技大学学报(自然科学版).2016,48(1):63-70.(WANG Xiantie,ZHOU Xuhong,SONG Wenjun,et al.Cyclic loading test study on concretefilled square steel tubular frame-diagonally cross stiffened thin steel plate shear walls[J].Journal of Xi’an University of Architecture and Technology(Natural Science Edition),2016,48(1):63-70.(in Chinese))
[10]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,2011:65-66.(LI Wei.Study on the seismic performance of circular concrete-filled steel tubular column to steel beam joint with external diaphragm[D].Beijing:Tsinghua University,2011:65-66.(in Chinese))
[11]AK Al-Rodan.T-cleat connection to concrete-filled tubular internal columns[J].Journal of Structural Engineering,ASCE,2004,130(5):725-731.
[12]RICLES J M,PENG S W,LU L W.Seismic behavior of com-posite concrete filled steel tube columella-wide flange be ammoment conncetions[J].Journal of Structural Engineering,ASCE,2004,130(2):223-232.
[13]STEPHEN P,SCHNEI M,KROPELNICKI J.Progressive collapse analysis of an RC structure[J].Structural Design of Tall and Special Buildings,2007,14(4):757-771.
[14]WANG Jingfeng,HAN Linhai,BRIAN Uy.Hysteretic behaviour of flush end plate joints to concrete-filled steel tubular columns[J].Journal of Constructional Steel Research,2009,65(8/9):1644-1663.
[15]徐嫚.钢管混凝土柱-钢梁节点拉弯性能及框架抗连续倒塌性能[D].哈尔滨:哈尔滨工业大学,2011:44-48.(XU Man.Tension-bending behavior of CFST column-steel beam connections and progressive collapse performance of frames[D].Harbin:Harbin Institute of Technology,2011:44-48.(in Chinese))
[16]唐九如.钢筋混凝土框架节点抗震[M].南京:东南大学出版社,1989:311-316.(TANG Jiuru.Earthquake resistant reinforced concrete frame joints[M].Nanjing:Southeast University Press,1989:311-316.(in Chinese))