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以强震区多高层钢结构框架的梁柱边节点为研究对象,通过3个足尺T形截面钢异形柱-钢梁节点试件在低周反复荷载作用下的拟静力试验,研究了试件的变形、应变分布、破坏模态,得到了试件的滞回曲线、骨架曲线、承载能力、节点域的剪切变形、转动能力、延性性能、耗能能力等抗震性能指标,分析了节点域强弱对抗震性能指标的影响。试验结果表明,T形截面钢异形柱-钢梁节点在破坏前经历充分的塑性变形,其破坏模态为局部屈曲破坏,塑性铰出现于远离梁柱焊缝的梁截面上且发展充分,有较高且稳定的承载能力,具备较好的塑性转动能力、延性性能和耗能能力,能够在强震区使用。研究为此类节点的工程应用和钢异形柱结构技术规程的编制提供依据。
Taking the beam-column edge joints of multi-high-rise steel frame in the strong earthquake area as the research object, through the pseudo-static test of three full-scale T-shaped steel-reinforced concrete column-steel beam joint specimens under low cyclic loading, The deformation, strain distribution and failure mode of the specimen are obtained. The seismic performance indexes such as the hysteresis curve, the skeleton curve, the bearing capacity, the shear deformation, the rotation ability, the ductility property and the energy dissipation capacity of the specimen are obtained. Influence of node strength on seismic performance index. The experimental results show that the deformed section of T-shaped steel-reinforced concrete column-steel beam underwent full plastic deformation before failure, and its failure mode was local buckling failure. Plastic hinge appeared on the beam section far away from the beam-column weld and developed well with High and stable carrying capacity, with good plastic rotation capacity, ductility and energy consumption capacity, can be used in the earthquake zone. The research provides the basis for the engineering application of such nodes and the compilation of the technical regulation of steel special-shaped columns.