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建立精细化有限元模型,得到了传统栓焊(WUFB)节点、盖板式(WCPF)和狗骨式(RBS)节点在连续倒塌过程中的失效过程,并从能量角度推导了3种节点的动力响应.结果表明:盖板式节点的转动刚度大、拉结能力强,梁机制和悬链线机制承载力均很高,结构的吸能能力好,抗连续倒塌性能优越;狗骨式节点的转动能力强,结构的悬链线效应和吸能能力提高,但结构的外力功增大,抗连续倒塌承载力略有降低.梁柱节点在连续倒塌工况中和地震作用下的受力状态差异大,连续倒塌工况下节点的极限转角远高于节点在地震作用下的转动能力.
The finite element model was established and the failure process of WUFB node, WCPF and RBS node during successive collapse was obtained. And three kinds of nodes were deduced from energy point of view Dynamic response.The results show that the rigidity of the cover-type joints is high, the strength of the joint is strong, the bearing capacity of the beam mechanism and the catenary mechanism are high, the energy absorption capacity of the structure is good and the performance of continuous collapse is superior, , The catenary effect and energy absorption capacity of the structure are improved, but the external force of the structure is increased and the bearing capacity of the anti-continuous collapse slightly decreases.The stress of the beam-column joint in the continuous collapse condition and the earthquake The difference of state is large. The limit turning angle of nodes under continuous collapse condition is far higher than the turning ability of nodes under earthquake action.