摘要
为了测试转换钢桁架节点的耗能性能,对上海长宁来福士转换钢桁架2个典型节点进行了滞回性能试验研究。通过分析节点的承载力、延性比和能量耗散系数,对此种节点的受力特点及破坏模式进行了深入的探讨。试验表明:节点的最终破坏模式为中柱与弦杆翼缘交界处发生剪切破坏,同时伴随着混凝土的拉裂。加载过程中,节点刚度退化比较明显,节点在最大剪切应变达到峰值后发生剪切破坏;弹性阶段时,等效黏滞阻尼系数较小,随着塑性的发展,等效黏滞阻尼系数逐渐增加,最终分别稳定在0.4和0.27左右,节点具有良好的耗能能力。
In order to test the dissipation capacity of transfer truss joint,the research of hysteretic behavior of transfer truss joint in Shanghai Changning Raffles City was carried out. The mechanical performance and failure mode was discussed by analyzing the bearing capacity,ductility ratio and energy dissipation factor of the joint. The test indicated that: the final failure mode is the shear failure on the interface between the middle column and chord flange,accompanying the crack of the concrete. In the loading process,the rigidity degeneration was obvious. Shear failure occurred when the maximum shear strain reached the peak value. In the elastic stage,the equivalent viscous damping coefficient is small,with the development of plasticity,the coefficient was increased gradually. In the last stage,the coefficient achieved stably at 0. 4 and 0. 27. The test indicated that the joint has a good performance of energy dissipation.
出处
《建筑结构》
CSCD
北大核心
2016年第S1期542-547,共6页
Building Structure
关键词
转换桁架
拟静力试验
滞回曲线
耗能性能
transfer truss
pseudo static test
hysteretic curve
energy-dissipating capacity
