钢管混凝土组合结构全螺栓隔板贯通节点的抗震性能试验研究

发布时间：2018-10-30 16:51

【摘要】：该文以方形钢管混凝土柱—H型钢梁全螺栓隔板贯通连接节点为研究对象,以梁偏心为参数,进行了2个足尺的节点试件SJ1和SJ2的低周往复荷载试验,研究了该类型节点的破坏机理与抗震性能。通过试验数据处理与分析得出了该节点类型的破坏机理、滞回曲线、骨架曲线、延性系数、耗能能力及刚度变化规律;通过隔板应变分析验证了试件的破坏机理。试验结果表明:该类型节点具有很好的抗震性能,节点承载力高,滞回曲线饱满,延性系数较大,耗能能力强等特点;主要变形发生在梁端塑性铰区域,隔板与柱连接处容易出现应力集中现象。两组节点在设计时均考虑了抗震设计要求,破坏形式基本相同,以隔板端部梁翼缘及腹板屈曲破坏为主,但由于SJ2梁存在偏心,在荷载作用下节点下隔板与柱连接处被撕裂。
[Abstract]:In this paper, the low cycle reciprocating load tests of two full-scale joint specimens SJ1 and SJ2 are carried out by taking the connecting joints of square concrete-filled steel tubular columns with H-type steel beams as the research object and the eccentricity of the beams as parameters. The failure mechanism and seismic performance of the joints are studied. The failure mechanism, hysteretic curve, skeleton curve, ductility coefficient, energy dissipation capacity and stiffness of the joint are obtained by processing and analyzing the test data, and the failure mechanism of the specimen is verified by the strain-analysis of the diaphragm. The test results show that the joint has good seismic performance, high bearing capacity, full hysteretic curve, large ductility coefficient and strong energy dissipation capacity. The main deformation occurs in the plastic hinge region at the end of the beam, and the stress concentration occurs easily at the connection between the diaphragm and the column. The seismic design requirements are considered in the design of the two groups of joints, and the failure form is basically the same. The main failure is the flange of the end beam and the buckling of the web plate. However, because of the eccentricity of the SJ2 beam, the connection between the diaphragm and the column under the load is torn.
【作者单位】：天津城建大学土木工程学院天津市软土特性与工程环境重点实验室;天津大学建筑工程学院;
【基金】：天津市自然科学基金项目(13JCYBJC19600) 国家重点基础研究发展计划项目(2011CB013603)
【分类号】：TU398.9

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