钢框架梁柱栓焊扩翼-翼缘削弱节点优势分析性能试验

Performance test for advantage analysis of strengthened- weakened beam to column connections in steel frame

为了对钢框架梁柱栓焊扩翼-翼缘削弱节点的性能优势进行分析,设计制作了3个较大比例的十字节点试件,包括栓焊扩翼-翼缘削弱型节点、单纯削弱型节点和单纯加强型节点,对其进行了低周往复循环加载试验,研究其破坏形态、承载力、延性性能和耗能能力等滞回性能,并用ABAQUS有限元软件对其进行了非线性有限元分析,进一步对比验证试验结果。研究结果表明,3种钢框架梁柱节点均能实现梁端塑性铰外移,保护梁端焊缝,避免节点脆性破坏。栓焊扩翼-翼缘削弱节点比其它两类节点有较好的延性和耗能能力,能够充分发挥加强式节点和削弱式节点的双重优势。

For studying the behaviour advantageof strengthened-weakene beam-to-column connections, three kinds of large-scale cross specimens were designed and fabricated, including strengthened-weakened beam to column con- nection, weakened connection and strengthened connection. Low-cyclic recipcocal loading tests were carried out to investigate their hysteresis behaviour such as failure mode, bearing capacity, ductility behaviour, energy dissipa- tion. The nolinear finite element analysis was conducted by using FE software ABAQUS and compared with the re- suits of test. The results indicates that these three kinds of beam-to-column connections in steel moment frame can effectively move the plastic hinge away from the face of the column protect the end weld and avoid brittle failure of the connection. Strengthened-weakened beam to column connection, by comparison, can make good use of the ad- vantages of strengthened and weakened connections and exhibit better seismic behaviour.