北京新机场航站楼C形柱复杂钢管相贯节点受力性能研究
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摘要
以北京新机场航站楼C形钢柱典型复杂钢管相贯节点为研究对象,设计了9个足尺节点,对其进行空间静力加载试验,研究不同加劲肋设置、钢材强度和加载方式对节点受力性能的影响。结果表明:未设置加劲肋的节点承载力较低,无法满足结构安全需求;采用Q345C钢材设置加劲肋的节点在设计荷载作用下有部分区域会进入塑性工作状态;采用Q460GJC钢材设置加劲肋的节点能够在1.4倍设计荷载作用下保持完全弹性工作状态;不同的加载方式仅对未设置加劲肋的节点影响较大,对设置加劲肋的节点影响较小。在试验研究基础上,对节点破坏模式和承载能力进行了研究,对加劲肋的设置进行优化,以设置三道加劲肋为优。
Under the project of ‘typical complex space joints of Beijing New Airport Terminal C type steel column', space static loading tests were conducted on nine full-scale complex tubular joints to examine the effects of stiffening ribs, steel grades, and loading modes. The results show that the ultimate bearing capacity of the joints without stiffening ribs is insufficient; Q345 C steel joints with stiffening ribs experience earlier plasticity when subjected to standard load condition; Q460 GJC steel joints with stiffening ribs can fully stay elastic under 1.4 times the standard load level. Different loading modes affect more on the joints without stiffening ribs, and have less influence on the remaining specimens. Based on the test results, the failure modes and ultimate bearing capacity of the joints were investigated and the arrangement of the stiffening ribs was optimized, with three stiffening ribs being the most suitable solution.
Under the project of ‘typical complex space joints of Beijing New Airport Terminal C type steel column', space static loading tests were conducted on nine full-scale complex tubular joints to examine the effects of stiffening ribs, steel grades, and loading modes. The results show that the ultimate bearing capacity of the joints without stiffening ribs is insufficient; Q345 C steel joints with stiffening ribs experience earlier plasticity when subjected to standard load condition; Q460 GJC steel joints with stiffening ribs can fully stay elastic under 1.4 times the standard load level. Different loading modes affect more on the joints without stiffening ribs, and have less influence on the remaining specimens. Based on the test results, the failure modes and ultimate bearing capacity of the joints were investigated and the arrangement of the stiffening ribs was optimized, with three stiffening ribs being the most suitable solution.
引文
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[10] 陈娟,孙伟健,聂建国. 钢管混凝土KK形相贯节点空间效应研究[J].建筑结构学报,2017,38(增刊1):402- 408.(CHEN Juan,SUN Weijian,NIE Jianguo. Study on spatial effect of concrete-filled steel tubular KK-joints[J]. Journal of Building Structures,2017,38(Suppl.1):402- 408.(in Chinese))
[11] 陈娟,聂建国,周成野. 钢管混凝土T形相贯节点应力集中系数研究[J].建筑结构学报,2018,39(3):149-157.(CHEN Juan,NIE Jianguo,ZHOU Chengye. Study on stress concentration factor of concrete-filled steel tubular T-joints[J]. Journal of Building Structures,2018,39(3):149-157.(in Chinese))
[12] WARDENIER J.Hollow sections in structural applications[M].Zoetermeer,Netherlands:Bouwen Met Staal,2002: 73-77.
[13] 赵宪忠,吴晓风,陈以一,等. 施工工艺对空间KK型圆钢管搭接节点静力性能的影响研究[J].建筑结构学报,2016,37(8):123-130.(ZHAO Xianzhong,WU Xiaofeng,CHEN Yiyi, et al. Study on effect of construction process on static behavior of multiplanar overlapped CHS KK-joints[J]. Journal of Building Structures,2016,37(8):123-130.(in Chinese))
[2] 张爱林,柴抒韬,刘学春,等.北京新机场航站楼C3和C5型柱体系整体稳定分析[J].钢结构,2017,32(8):1- 6.(ZHANG Ailin,CHAI Shutao,LIU Xuechun,et al. Overall stability analysis of C3-column and C5-column structures in the terminal of Beijing New Airport[J].Steel Construction,2017,32(8):1- 6.(in Chinese))
[3] CHOOY S, QIAN X D, WARDENIER J. Effects of boundary conditions and chord stresses on static strength of thick-walled CHS K joints[J]. Journal of Constructional Steel Research,2006,62(4):316-328.
[4] 陈以一,王伟,赵宪忠,等. 圆钢管相贯节点抗弯刚度和承载力实验[J].建筑结构学报,2001,22(6):25-30.(CHEN Yiyi,WANG Wei,ZHAO Xianzhong,et al. Experiments on bending rigidity and resistance of unstiffened tubular joints[J]. Journal of Building Structures,2001,22(6):25-30.(in Chinese))
[5] 陈以一,陈扬骥,詹琛,等. 圆钢管空间相贯节点的实验研究[J].土木工程学报,2003,36(8):24-30.(CHEN Yiyi,CHEN Yangji,ZHAN Chen,et al. Experimental research on multi-planar joints of steel tubular members[J]. China Civil Engineering Journal,2003,36(8):24-30.(in Chinese))
[6] 邱国志,赵金城. X型圆钢管相贯节点刚度试验[J].上海交通大学学报,2008,42(6):966-970.(QIU Guozhi,ZHAO Jincheng. Experimental research on rigidity of circular tubular X-joints[J]. Journal of Shanghai Jiaotong University,2008,42(6):966-970.(in Chinese))
[7] 舒兴平,袁智深,姚尧. N形方主管圆支管相贯节点受力性能试验研究[J].建筑结构学报,2012,33(12):47-54.(SHU Xingping,YUAN Zhishen,YAO Yao. Experimental research on mechanical behavior of CHS-to-SHS N-joints[J]. Journal of Building Structures,2012,33(12):47-54.(in Chinese)).
[8] 王伟,顾青. X形方圆汇交钢管节点的焊缝轴拉性能试验研究与承载力计算[J].建筑结构学报,2015,36(3):98-105.(WANG Wei,GU Qing. Experimental research and strength prediction of axial tensile behavior of welds for X-joints with CHS braces to SHS chord[J]. Journal of Building Structures,2015,36(3):98-105.(in Chinese))
[9] 马昕煦,王伟,陈以一. 正交X形圆钢管相贯节点焊缝断裂的试验与机理分析[J].建筑结构学报,2018,39(3):139-148.(MA Xinxu,WANG Wei,CHEN Yiyi. Experiment and mechanism analysis of weld fracture of orthogonal CHS-CHS X-joint[J]. Journal of Building Structures,2018,39(3):139-148. (in Chinese))
[10] 陈娟,孙伟健,聂建国. 钢管混凝土KK形相贯节点空间效应研究[J].建筑结构学报,2017,38(增刊1):402- 408.(CHEN Juan,SUN Weijian,NIE Jianguo. Study on spatial effect of concrete-filled steel tubular KK-joints[J]. Journal of Building Structures,2017,38(Suppl.1):402- 408.(in Chinese))
[11] 陈娟,聂建国,周成野. 钢管混凝土T形相贯节点应力集中系数研究[J].建筑结构学报,2018,39(3):149-157.(CHEN Juan,NIE Jianguo,ZHOU Chengye. Study on stress concentration factor of concrete-filled steel tubular T-joints[J]. Journal of Building Structures,2018,39(3):149-157.(in Chinese))
[12] WARDENIER J.Hollow sections in structural applications[M].Zoetermeer,Netherlands:Bouwen Met Staal,2002: 73-77.
[13] 赵宪忠,吴晓风,陈以一,等. 施工工艺对空间KK型圆钢管搭接节点静力性能的影响研究[J].建筑结构学报,2016,37(8):123-130.(ZHAO Xianzhong,WU Xiaofeng,CHEN Yiyi, et al. Study on effect of construction process on static behavior of multiplanar overlapped CHS KK-joints[J]. Journal of Building Structures,2016,37(8):123-130.(in Chinese))