摘要
对4个带外加强环不等高梁钢管混凝土柱节点试件进行了循环加载和单调加载试验,试件主要变化参数为节点两侧梁高度差,取值为0、75、150 mm。为了研究节点域的受剪承载力,对试件按"强构件,弱节点"进行设计。对于所设计的4个节点试件,其破坏分为整个节点域剪切破坏和部分节点域剪切破坏。试验结果表明:加载方式对试件节点域剪切承载力影响不大;节点试件在正反两个方向加载形成不同的破坏模式,并且在反向荷载作用下其承载力略高于其在正向荷载作用下的承载力;节点两侧梁高度差对节点域破坏形式和承载力影响显著;在整个加载过程中,所有试件节点均未出现开裂;该类节点具有很好的变形能力和稳定的耗能能力,但随着两侧梁高度差的增加,耗能能力逐渐降低。
This paper presents seismic behavior of steel unequal-depth-beams to concrete-filled-tubular-column connection with external-diaphragm（ UCCE）. Four specimens were conducted under cyclic and monotonic loading tests. The experimental parameters were beam depths and loading type（ cyclic loading and monotonic loading）. In order to discuss the shear resistant capacity of the panel zone,specimens were designed following the principle of strong-member and weak-connection. The failure modes of UCCE include the shear failure of the entire panel zone and the shear failure of partial panel zone. It is found that,the loading types have little influence on the shear strength and shear deformation of entire panels. UCCE forms different failure modes under different loading directions. In addition,the shear capacities of specimens under the negative loading are a little higher than those under the positive loading.The difference in beam depth has major impacts on both failure modes and shear capacities of connection panel zone.All the specimens behave in a ductile manner throughout the test and no signs of fracturing. Beam-to-CFT column connections have good deformability and stable energy dissipation capacity. However,with the increase of differences in beam depths,the energy dissipation capacity decreases.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2017年第5期77-84,共8页
Journal of Building Structures
基金
山东省中青年科学家科研奖励基金项目(ZR2016EEB38)
山东省博士后创新项目(201601017)
青岛市应用研究项目(2016194)
关键词
钢管混凝土节点
变截面
外加强环
循环加载试验
单调加载试验
抗震性能
beam-to-CFT column connection
unequal-depth-beam
external diaphragm
cyclic loading test
monotonic loading test
seismic behavior
