装配式梁柱内套筒组合螺栓连接节点的力学性能试验研究

发布时间：2018-09-12 11:29

【摘要】：为深入研究装配式梁柱内套筒组合螺栓连接节点力学性能,进行了3个十字形1/2缩尺比例节点试件在低周往复荷载作用下的试验研究,对节点的破坏模式、滞回性能、刚度退化、节点核心区剪切变形、弯矩-转角关系曲线等进行了分析.研究结果表明,在低周往复荷载作用下节点的破坏模式主要表现为对穿螺栓被拉断,外伸端板屈曲,柱壁凹屈,柱壁间连接焊缝断裂;上段柱对穿螺栓往复滑移造成的塑性变形集中在柱壁及外伸端板区域并形成塑性铰,节点具有一定的耗能能力,受对穿螺栓贯穿柱壁连接效应影响,在往复荷载作用下出现"对称凹屈"现象;随内套筒厚度增加,节点核心区剪切变形减小,抗剪刚度增加;节点具有一定的转动刚度,表现出半刚性节点性质.提出的装配式梁柱内套筒组合螺栓连接节点可以实现上柱与下柱、梁与柱全装配式连接.
[Abstract]:In order to deeply study the mechanical properties of assembled Liang Zhu inner sleeve composite bolt connection joint, three cross 1 / 2 scale proportional joint specimens were tested under low cycle reciprocating load. The failure mode and hysteretic performance of the joints were studied. The stiffness degradation, shear deformation in the core area and the moment-rotation curve are analyzed. The results show that the failure modes of the joints under low cycle reciprocating load are mainly as follows: the opposite bolt is broken, the end plate is buckled, the column wall is concave and the weld seam between the column walls is broken. The plastic deformation caused by reciprocating slip of the upper column is concentrated in the wall of the column and the outer end plate and forms plastic hinge. The joint has a certain energy dissipation capacity and is affected by the connection effect of the piercing bolt through the column wall. Under reciprocating load, the phenomenon of "symmetrical concave buckling" occurs; with the increase of the thickness of the inner sleeve, the shear deformation in the core region of the joints decreases and the shear stiffness increases; the joints have a certain rotational stiffness, showing the properties of semi-rigid joints. The assembled Liang Zhu inner sleeve combined bolt connection joint can realize the full assembly connection between upper column and lower column, beam and column.
【作者单位】：青岛理工大学土木工程学院;
【基金】：国家自然科学基金资助项目(51678316) 国家重点研发计划重点专项资助项目(2016YFC0701204)
【分类号】：TU391

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