装配式外套筒-加强式外伸端板组件梁柱连接节点抗震性能试验研究

发布时间：2019-01-11 19:36

【摘要】：针对装配式外套筒-加强式外伸端板组件梁与柱连接节点试件进行低周往复加载、单调加载试验,研究节点的受力机制、破坏模式、承载能力、耗能能力、延性和刚度退化等抗震性能。研究结果表明:节点初始转动刚度随外套筒壁厚的增加而增大,当外套筒壁厚由12mm增大到14mm时,节点初始转动刚度增大约17%。增大外套筒壁厚延迟节点的刚度退化速度;梁与柱采用高强螺栓外伸端板组件连接,可以提高节点的变形和耗能能力。梁柱对拉螺栓连接产生一定的"对拉效应",使节点具有较大的转动能力,试件转角均超过0.035rad,可以满足"强节点"和大震对连接节点转动能力的要求;但是过于显著的对拉效应,使节点产生滑移,滞回环由"弓形"过渡到"反S形",节点的耗能能力下降。设计中应通过选择合理的螺栓直径和外套筒壁厚、合理控制对拉螺栓的伸长值、减少外套筒与柱壁间的加工误差等措施,提高节点的刚度以及耗能能力。
[Abstract]:The load-bearing mechanism, failure mode, load-carrying capacity, energy dissipation capacity of the joints are studied by low-cycle reciprocating loading and monotonic loading test for the specimens with assembled outer sleeve and stiffened extension end-plate components. Seismic performance such as ductility and stiffness degradation. The results show that the initial rotational stiffness of the joint increases with the increase of the outer sleeve wall thickness. When the external sleeve wall thickness increases from 12mm to 14mm, the initial rotational stiffness of the joint increases by about 17 parts. The deformation and energy dissipation capacity of the joints can be improved by increasing the stiffness degradation speed of the delayed joints of the outer sleeve wall thickness and connecting the beams and columns with the high-strength bolt extension end-plate components. Liang Zhu has a certain "pull effect" on the connection of pulling bolt, which makes the joint have greater rotation ability, and the rotation angle of the specimen exceeds 0.035 rad. it can meet the requirements of the "strong joint" and the strong earthquake on the connection joint rotation ability. However, if the tensile effect is too significant, the joint will slip, the hysteresis loop will transition from "bow" to "anti-S", and the energy dissipation capacity of the joint will decrease. In order to improve the stiffness and energy dissipation of joints, the reasonable bolt diameter and wall thickness of outer sleeve should be selected, the elongation value of pulling bolt should be controlled reasonably, and the machining error between outer sleeve and column wall should be reduced.
【作者单位】：青岛理工大学;
【基金】：国家自然科学基金面上项目(51678316) 国家重点研发计划“绿色建筑及建筑工业化”重点专项(2016YFC0701204)
【分类号】：TU352.11;TU391

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