论文部分内容阅读
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。
The cyclic loading and monotonous loading tests were carried out on four specimens with unequal-height girder with out-of-center reinforcement beams. The main parameters of the specimen were the beam height differences on both sides of the joint, and the values were 0,75,150 mm. In order to study the shear strength of the node domain, the design of the test piece according to “strong component, weak node ”. For the four designed nodes, the failure is divided into shear damage of the whole node domain and shear damage of some nodes. The experimental results show that the loading method has little effect on the shear capacity of the specimen nodal area. The specimens are loaded in both positive and negative directions to form different failure modes, and the bearing capacity of the specimen is slightly higher than that under the reversed loading The bearing capacity under the positive load; the height difference between the two sides of the beam has a significant effect on the failure mode and bearing capacity of the node domain; during the entire loading process, no cracking occurs on all the specimen nodes; the nodes have good deformation capacity And stable energy consumption capacity, but with the increase of the height difference between the two sides of the beam, energy consumption decreased gradually.