工厂加工制作的特殊构造梁柱节点抗震性能试验研究

发布时间：2018-05-14 11:26

本文选题：梁柱节点 + 端板螺栓连接　；参考：《建筑结构学报》2014年07期

【摘要】：为研究工业用途的某特种钢结构的抗震性能,选取其中3个特殊构造梁柱节点,即柱强轴方向带悬臂梁段的端板螺栓节点(试件I)、柱强轴方向有梁的弱轴方向异型盖板焊接节点(试件II)、柱强轴方向无梁的弱轴方向异型盖板焊接节点(试件III),制作足尺试件,进行循环荷载作用下的拟静力试验,研究端板连接、空间加载制度以及特殊的构造形式对节点破坏形态、承载力、塑性转角、延性及耗能能力的影响。试验结果表明:3种形式节点试件的梁端最大塑性转角均能达到0.025 rad,位移延性系数大于4.0,累积塑性转角可达最大塑性转角的20~30倍,承载力可达到梁全截面塑性承载力的1.0~1.3倍;试件II的最大层间位移角达到0.035 rad,最终因梁中发生局部屈曲而破坏,而试件I和试件III的最大层间位移角可达0.040 rad,满足美国钢结构抗震设计规范中对特殊抗弯钢框架梁柱节点转动能力的限值要求,破坏形态分别为螺栓拉断、盖板出现延性开裂。研究结果表明,试件II和试件III抗震性能良好,试件I因端板螺栓连接承载力不足,导致其耗能能力较差,因此需从设计上加以改进。
[Abstract]:In order to study the seismic behavior of a special steel structure for industrial use, three special Liang Zhu joints were selected. The end plate bolted joint with cantilever beam section in the direction of strong shaft of column (specimen I _ (1), the welded joint of special shaped cover plate in weak axis direction with beam in the direction of strong axis of column (specimen IIN), the welded joint (specimen III _ (1) in weak axis direction with no beam in the direction of column strong axis (specimen III _ (1) is used to make full-scale test piece, The quasi-static test under cyclic load was carried out to study the effects of end-plate connection, spatial loading system and special structural form on the failure pattern, bearing capacity, plastic rotation angle, ductility and energy dissipation capacity of joints. The test results show that the maximum plastic rotation angle of beam end of the specimens with three types of joints is 0.025 rad. the ductility coefficient of displacement is greater than 4.0, the cumulative plastic rotation angle can reach 2030 times of the maximum plastic rotation angle, and the bearing capacity can reach 1.0 ~ 1.3 times of the plastic bearing capacity of the full section of the beam. The maximum interstory displacement angle of specimen II reached 0.035 rads, which was destroyed by local buckling in the beam. The maximum interstory displacement angle of specimen I and specimen III can reach 0.040 rad. which meets the limit requirement of Liang Zhu joint rotation ability of special flexural steel frame in American Code for Seismic Design of Steel structures. The failure forms are bolt break and ductile cracking of cover plate respectively. The results show that the seismic performance of specimen II and specimen III is good, and the energy dissipation capacity of specimen I is poor due to the insufficient bearing capacity of end-plate bolt connection, so the design should be improved.
【作者单位】：清华大学土木工程系;中国石化工程建设有限公司;
【分类号】：TU391;TU317.1;TU352.11

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