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为了进一步研究方钢管混凝土柱-H型钢梁全螺栓隔板贯通式节点的力学性能及其在地震作用下的滞回特性,对4个足尺的节点试件进行了低周往复荷载试验。通过对试验数据的分析与拟合,提出了方钢管混凝土柱-H型钢梁全螺栓隔板贯通式节点三折线骨架模型及试件的刚度退化规律,确定了该节点的弯矩-曲率滞回模型,最后利用试验数据对该模型进行验证。结果表明,该滞回模型具有计算公式简单、易于掌握、计算精度较高等优点,能够充分反映该节点的承载力变化、刚度退化和滑移变形,此外该模型对研究变量进行了无量纲化处理,避免了数量级带来的麻烦,便于实际应用。
In order to further study the mechanical properties of through-type joints of square steel tubular column-H beam with full bolt diaphragms and the hysteretic behavior under earthquake action, 4 full-scale joint specimens were subjected to low-cycle reciprocating load test. Based on the analysis and fitting of test data, the regularity of the three-fold line skeleton model and the stiffness degradation of the full-bolted bulkhead through-square joints of the square steel tube concrete column-H type steel beam were proposed, and the bending moment-curvature hysteresis Back to the model, and finally use the experimental data to verify the model. The results show that the hysteresis model has the advantages of simple calculation formula, easy to grasp and high calculation accuracy, which can fully reflect the bearing capacity variation, stiffness degradation and slippage deformation of the node. In addition, the model has non-dimensional treatment of the research variables , To avoid the inconvenience of orders of magnitude, easy to practical application.