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梁翼缘削弱的梁柱刚性连接是将塑性铰外移的一种典型节点形式。为研究这种连接形式在循环荷载作用下的滞回性能,共进行了6个模型的拟静力加载试验,其中5个模型用于研究梁翼缘的削弱深度、削弱长度、削弱起始位置对节点连接的破坏形态、极限荷载、最大塑性转角、延性性能的影响。作为比较,还进行了一个传统型梁柱全焊接刚性模型连接的试验。试验结果表明:梁翼缘削弱节点比传统梁柱刚性连接具有良好的塑性变形能力和耗能性能,试验中5个节点的塑性转角都大于0.04rad,延性系数大于4.0,达到了抗弯钢框架连接塑性转角不小于0.03rad,延性系数不小于4.0的要求。而普通梁柱全焊接刚性连接的塑性转角仅达到0.026rad,延性系数仅为2.4。5个试件的破坏主要以翼缘削弱处平面外刚度较弱而导致梁发生扭转失稳或梁下翼缘与柱连接的对接焊缝的脆性断裂为主。研究结果表明:将梁翼缘进行适当的削弱后形成的骨型节点可以增加梁柱节点的耗能性能,是一种较为理想的延性节点。
Beam flange weakening of the beam rigid connection is plastic hinges move a typical node form. In order to study the hysteretic behavior of this connection form under cyclic loading, a total of six models were quasi-static loading tests, of which five models were used to study the weakening depth of the beam flange, weakening the length, weakening the initial position of the node The failure mode of connection, the ultimate load, the maximum plasticity angle, the ductility of the impact. As a comparison, a test was also carried out on the connection of a fully welded rigid beam and column model. The experimental results show that the weakened joints of beam flange have better plastic deformation capacity and energy dissipation performance than the traditional rigid connection of beam and column. The plastic corner angles of all five joints are greater than 0.04rad and the ductility coefficient is greater than 4.0, Corner of not less than 0.03rad, ductile coefficient of not less than 4.0 requirements. However, the plasticity of all welded rigid connections of normal beam and column is only 0.026rad, and the ductile coefficient is only 2.4.5. The failure of the specimens mainly depends on the weakened outer flange of the flange, The brittle fracture of the butt-welded butt-welded joints is dominated. The results show that the bone-type joints formed after properly weakened the beam flanges can increase the energy dissipation performance of the beam-column joints, which is an ideal ductile joint.