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研究钢框架梁柱节点负载下焊接盖板加固之后的力学性能,为工程设计提供参考,为相关规范修订提供理论依据.通过对4个节点试件的试验研究,考虑梁端不同初始负载等级影响,重点分析了梁柱节点的破坏形式、承载力、延性、耗能能力、刚度退化等抗震性能,并且对比分析了加固之前的文献.结果表明:负载下焊接盖板加固梁柱节点能够有效地提高其承载力和延性耗能能力,并成功地将塑性铰外移到距盖板末端约1/4梁高截面位置,保护了梁柱翼缘焊缝,达到了加固的目的.
Studying the mechanical properties of welded frame under the load of steel beam and column joints, providing references for engineering design and providing a theoretical basis for the revision of relevant codes.According to the experimental study of 4-node specimens, considering the influence of different initial load levels , The seismic behavior of the beam-column joints such as failure mode, bearing capacity, ductility, energy dissipation capacity and stiffness degradation are analyzed in detail, and the literature before reinforcement is comparatively analyzed. The results show that the beam- Improve the bearing capacity and ductility energy dissipation ability, and successfully displace the plastic hinges to the position of about 1/4 of the height of the beam from the end of the cover plate to protect the weld of the beam and column flange, thus achieving the purpose of reinforcement.