不同腔体构造圆钢管混凝土短柱抗震性能试验
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摘要
为研究不同腔体构造对圆钢管混凝土短柱抗震性能的影响,进行了3个不同腔体构造的大截面尺寸圆钢管混凝土短柱试件的低周反复荷载试验。试件钢构件分别为圆钢管、圆钢管腔内焊接环向及竖向肋板并设置钢筋笼以及圆钢管内置圆钢管,其中后两者钢构件用钢量相等。各试件的轴力均相等。分析了各试件的承载力、刚度退化、滞回特性、延性、耗能及破坏特征。研究表明:竖向肋板的设置可以提高构件的受弯承载力;环向肋板可以显著约束钢管径向变形;内置圆钢管强化了核心区混凝土的约束,使得外钢管弹塑性变形能力增强;含钢率相等条件下,圆钢管内置圆钢管混凝土短柱与圆钢管腔内焊接环向及竖向肋板并设置钢筋笼混凝土短柱相比,虽然水平承载力略有下降,但是其延性系数和累积耗能能力有显著提高; 3个不同腔体构造圆钢管混凝土短柱的等效黏滞阻尼系数分别为0. 41、0. 53、0. 58,均具有较好的耗能性能。圆钢管混凝土柱在压、弯、剪复合受力状态下的承载力试验值高于按照我国规范和规程所得出的计算值,表明我国规范和规程在计算足尺试件承载力时,结果偏于安全。
In order to investigate the influence of different construction exerting on seismic behavior of circular concrete-filled steel tubular( CFST) stub columns,low cyclic loading tests of three large-scale CFST stub columns with different constructions were conducted. The steel components of the specimen was set as steel tube,steel tube with welded horizontal rib,vertical rib and steel cage,and double-skin steel tube,respectively. The latter two specimens had the same amount of steel. The axial force of each specimen was equal. The bearing capacity,stiffness degradation,hysteretic behavior,ductility,energy dissipating capacity and failure characteristics of each specimen were analyzed. The tests results indicate that the setting of vertical ribs can improve the flexural bearing capacity of the member,the horizontal ribs have a significant confining effect on the radial deformation of the steel tube. Inner steel tube has strong confining effect on the core concrete,which enhances the plastic deforming capacity of the outer steel tube. Under the condition of having the same amount of steel,although the bearing capacity of double-skin steel tube is slightly lower than that of steel tube with welded horizontal rib,vertical rib and steel cage,the ductility coefficient and accumulated energy dissipating capacity are significantly improved. The equivalent viscous damping coefficients of each specimen with different constructions are 0. 41,0. 53 and 0. 58, possessing favorable energy dissipating performances. The test results of CFST column bearing capacity under combination effect of compression,bending and shear are higher than the calculated value according to Chinese code,indicating that the calculated bearing capacity of full-size specimens according to the Chinese code shows a tendency to be rather safe.
In order to investigate the influence of different construction exerting on seismic behavior of circular concrete-filled steel tubular( CFST) stub columns,low cyclic loading tests of three large-scale CFST stub columns with different constructions were conducted. The steel components of the specimen was set as steel tube,steel tube with welded horizontal rib,vertical rib and steel cage,and double-skin steel tube,respectively. The latter two specimens had the same amount of steel. The axial force of each specimen was equal. The bearing capacity,stiffness degradation,hysteretic behavior,ductility,energy dissipating capacity and failure characteristics of each specimen were analyzed. The tests results indicate that the setting of vertical ribs can improve the flexural bearing capacity of the member,the horizontal ribs have a significant confining effect on the radial deformation of the steel tube. Inner steel tube has strong confining effect on the core concrete,which enhances the plastic deforming capacity of the outer steel tube. Under the condition of having the same amount of steel,although the bearing capacity of double-skin steel tube is slightly lower than that of steel tube with welded horizontal rib,vertical rib and steel cage,the ductility coefficient and accumulated energy dissipating capacity are significantly improved. The equivalent viscous damping coefficients of each specimen with different constructions are 0. 41,0. 53 and 0. 58, possessing favorable energy dissipating performances. The test results of CFST column bearing capacity under combination effect of compression,bending and shear are higher than the calculated value according to Chinese code,indicating that the calculated bearing capacity of full-size specimens according to the Chinese code shows a tendency to be rather safe.
引文
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[13]武海鹏,曹万林,董宏英,等.不同加载方向异形截面多腔钢管混凝土分叉柱抗震性能试验[J].振动与冲击,2018,37(18):78-85.(WU Haipeng,CAOWanlin,DONG Hongying,et al.Seismic behavior tests on special-shaped CFT mega bifurcate columns coupled with multiple cavities under different direction horizontal loading[J].Journal of Vibration and Shock,2018,37(18):78-85.(in Chinese))
[14]武海鹏,乔崎云,曹万林,等.轴拉力作用下异形截面多腔钢管混凝土巨型分叉柱抗震性能试验研究[J].建筑结构学报,2018,39(7):84-94.(WUHaipeng,QIAO Qiyun,CAO Wanlin,et al.Seismic behavior of special-shaped CFT mega bifurcate column coupled with multiple cavities under axial tensile force[J].Journal of Building Structures,2018,39(7):84-94.(in Chinese))
[15]孙晓岭,郝际平,薛强,等.壁式钢管混凝土柱抗震性能试验研究[J].建筑结构学报,2018,39(6):92-101.(SUN Xiaoling,HAO Jiping,XUE Qiang,et al.Experimental study on seismic behavior of walled concrete-filled steel tubular columns[J].Journal of Building Structures,2018,39(6):92-101.(in Chinese))
[16]欧智菁,陈盛富,吴庆雄,等.变截面钢管混凝土格构柱抗震性能试验研究[J].建筑结构学报,2018,39(3):77-83.(OU Zhijing,CHEN Shengfu,WUQingxiong,et al.Experimental research on seismic performance of variable cross-sectional concrete filled steel tubular laced columns[J].Journal of Building Structures,2018,39(3):77-83.(in Chinese))
[17]宋华,杨远龙,刘界鹏.对拉钢筋加劲L形截面钢管混凝土柱抗震性能研究[J].建筑结构学报,2017,38(增刊1):179-184.(SONG Hua,YANG Yuanlong,LIU Jiepeng.Seismic behavior of L-shaped concretefilled steel tubular columns with reinforcement stiffeners[J].Journal of Building Structures,2017,38(Suppl.1):179-184.(in Chinese))
[18]钢管混凝土结构技术规范:GB 50936-2014[S].北京:中国建筑工业出版社,2014.(Technical specification for concrete filled steel tubular structures:GB 50936-2014[S].Beijing:China Architecture&Building Press,2014.(in Chinese))
[19]钢管混凝土技术规程:DBJ/T 13-51-2010[S].福州:福建省住房和城乡建设厅,2010.(Technical specifications for concrete-filled steel tubular structures:DBJ/T 13-51-2010[S].Fuzhou:Department of Housing and Urban-Rural Development of Fujian Province,2010.(in Chinese))
[20]MANDER J B,PRIESTLEY M J N.Theoretical stressstrain model for confined concrete[J].Journal of Structural Engineering,1988,114(8):1807-1826.
[21]蔡绍怀.现代钢管混凝土结构[M].2版.北京:人民交通出版社,2007:54-57.(CAI Shaohuai.Modern steel tube confined concrete structures[M].2nd ed.Beijing:China Communications Press,2007:54-57.(in Chinese))
[2]韩林海.钢管混凝土结构理论与实践[M].2版.北京:科学出版社,2007:11-12.(HAN Linhai.Theory and practice of concrete-filled steel tubular structure[M].2nd ed.Beijing:Science Press,2007:11-12.(in Chinese))
[3]GAJALAKSHMI P,HELENA H J.Behavior of concrete-filled steel columns subjected to lateral cyclic loading[J].Journal of Constructional Steel Research,2012,75:55-63.
[4]MOON J,LEHMAN D E,ROEDER C W,et al.Strength of circular concrete-filled tubes with and without internal reinforcement under combined loading[J].Journal of Structural Engineering,2013,139:0401301212.
[5]SKALOMENOS K A,HAYASHI K,NISHI R,et al.Experimental behavior of concrete-filled steel tube columns using ultrahigh-strength steel[J].Journal of Structural Engineering,2016,142:040160579.
[6]KWON Y B,PARK S W.Resistance of circular concrete-filled tubular sections to combined axial compression and bending[J].Thin-Walled Structures,2017,111:93-102.
[7]吕西林,陆伟东.反复荷载作用下方钢管混凝土柱的抗震性能试验研究[J].建筑结构学报,2000,21(2):2-11.(LU Xilin,LU Weidong.Experimental study on seismic behavior of concrete-filled steel tubular columns subjected to cycling loading[J].Journal of Building Structures,2000,21(2):2-11.(in Chinese))
[8]李学平,吕西林,郭少春.反复荷载下矩形钢管混凝土柱的抗震性能Ⅰ:试验研究[J].地震工程与工程振动,2005,25(5):95-103.(LI Xueping,LU Xilin,GUO Shaochun.Seismic behavior of CFRT columns under cyclic loadingⅠ:experimental study[J].Earthquake Engineering and Engineering Vibration,2005,25(5):95-103.(in Chinese))
[9]李学平,吕西林,郭少春.反复荷载下矩形钢管混凝土柱的抗震性能Ⅱ:分析研究[J].地震工程与工程振动,2005,25(5):104-111.(LI Xueping,LU Xilin,GUO Shaochun.Seismic behavior of CFRT columns under cyclic loadingⅡ:analytical study[J].Earthquake Engineering and Engineering Vibration,2005,25(5):104-111.(in Chinese))
[10]杨俊芬,胡盼盼,闫西峰,等.圆钢管混凝土悬臂长柱压弯构件抗震性能研究[J].建筑结构学报,2016,37(11):121-129.(YANG Junfen,HU Panpan,YAN Xifeng,et al.Research on seismic behavior of beam-column members of long cantilever concrete-filled circular steel tubes[J].Journal of Building Structures,2016,37(11):121-129.(in Chinese))
[11]张元植.设传力措施的巨型方钢管混凝土柱抗震性能有限元分析[J].建筑结构学报,2018,39(11):20-28.(ZHANG Yuanzhi.Finite element analysis on seismic performance of giant CFRT columns with loadtransfer details[J].Journal of Building Structures,2018,39(11):20-28.(in Chinese))
[12]武海鹏,乔崎云,曹万林,等.不同构造异形截面多腔钢管混凝土分叉柱抗震性能试验[J].土木工程学报,2018,51(6):23-31.(WU Haipeng,QIAOQiyun,CAO Wanlin,et al.Experimental study on seismic behavior of special-shaped CFT bifurcate columns with multiple cavities and different crosssectional constructions[J].China Civil Engineering Journal,2018,51(6):23-31.(in Chinese))
[13]武海鹏,曹万林,董宏英,等.不同加载方向异形截面多腔钢管混凝土分叉柱抗震性能试验[J].振动与冲击,2018,37(18):78-85.(WU Haipeng,CAOWanlin,DONG Hongying,et al.Seismic behavior tests on special-shaped CFT mega bifurcate columns coupled with multiple cavities under different direction horizontal loading[J].Journal of Vibration and Shock,2018,37(18):78-85.(in Chinese))
[14]武海鹏,乔崎云,曹万林,等.轴拉力作用下异形截面多腔钢管混凝土巨型分叉柱抗震性能试验研究[J].建筑结构学报,2018,39(7):84-94.(WUHaipeng,QIAO Qiyun,CAO Wanlin,et al.Seismic behavior of special-shaped CFT mega bifurcate column coupled with multiple cavities under axial tensile force[J].Journal of Building Structures,2018,39(7):84-94.(in Chinese))
[15]孙晓岭,郝际平,薛强,等.壁式钢管混凝土柱抗震性能试验研究[J].建筑结构学报,2018,39(6):92-101.(SUN Xiaoling,HAO Jiping,XUE Qiang,et al.Experimental study on seismic behavior of walled concrete-filled steel tubular columns[J].Journal of Building Structures,2018,39(6):92-101.(in Chinese))
[16]欧智菁,陈盛富,吴庆雄,等.变截面钢管混凝土格构柱抗震性能试验研究[J].建筑结构学报,2018,39(3):77-83.(OU Zhijing,CHEN Shengfu,WUQingxiong,et al.Experimental research on seismic performance of variable cross-sectional concrete filled steel tubular laced columns[J].Journal of Building Structures,2018,39(3):77-83.(in Chinese))
[17]宋华,杨远龙,刘界鹏.对拉钢筋加劲L形截面钢管混凝土柱抗震性能研究[J].建筑结构学报,2017,38(增刊1):179-184.(SONG Hua,YANG Yuanlong,LIU Jiepeng.Seismic behavior of L-shaped concretefilled steel tubular columns with reinforcement stiffeners[J].Journal of Building Structures,2017,38(Suppl.1):179-184.(in Chinese))
[18]钢管混凝土结构技术规范:GB 50936-2014[S].北京:中国建筑工业出版社,2014.(Technical specification for concrete filled steel tubular structures:GB 50936-2014[S].Beijing:China Architecture&Building Press,2014.(in Chinese))
[19]钢管混凝土技术规程:DBJ/T 13-51-2010[S].福州:福建省住房和城乡建设厅,2010.(Technical specifications for concrete-filled steel tubular structures:DBJ/T 13-51-2010[S].Fuzhou:Department of Housing and Urban-Rural Development of Fujian Province,2010.(in Chinese))
[20]MANDER J B,PRIESTLEY M J N.Theoretical stressstrain model for confined concrete[J].Journal of Structural Engineering,1988,114(8):1807-1826.
[21]蔡绍怀.现代钢管混凝土结构[M].2版.北京:人民交通出版社,2007:54-57.(CAI Shaohuai.Modern steel tube confined concrete structures[M].2nd ed.Beijing:China Communications Press,2007:54-57.(in Chinese))