考虑楼板影响的外环板式梁柱节点抗震性能:试验研究  

ASEISMIC PERFORMANCE OF BEAM-TO-COLUMN JOINTS WITH EXTERNAL-DIAPHRAGM CONSIDERING SLAB EFFECT: EXPERIMENTAL INVESTIGATION

作　　者：牟犇[1] 王玲玲 张春巍[1] 林旭川[2] 

机构地区：[1]青岛理工大学土木工程学院,青岛266033 [2]中国地震局工程力学研究所,哈尔滨150080

出　　处：《工程力学》2018年第2期160-168,213,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(51678322;51408562);山东省中青年科学家科研奖励基金项目(ZR2016EEB38);山东省博士后创新资金项目(201601017);青岛市应用研究项目(2016194);中国博士后面上资助项目(2017M612226)

摘　　要：该文对采用Q390钢材制作的4个T形节点构件进行了低周反复荷载试验,研究了钢梁和混凝土楼板的组合作用对采用高性能钢的外环板式梁柱节点的刚度、承载力以及耗能能力的影响。试验结果表明:由于楼板组合作用,钢梁上翼缘的稳定性得到显著提高;采用外环板式的梁柱节点连接方式,能够有效地将塑性铰外移,避免了在节点域附近的焊缝发生撕裂;但由于楼板组合作用的影响,此种节点形式也存在节点域附近外环板处发生断裂的可能性;该试验4个构件的滞回曲线都较为饱满,表现出较好的耗能能力和延性性能,在塑性点时,无楼板作用的试件的粘滞阻尼系数略高于有楼板作用的试件的粘滞阻尼系数;在层间位移角达到0.05 rad时,各试件的粘滞阻尼系数趋于一致。This research investigated the slab effect on the stiffness, strength and energy dissipating of a composite joint with high performance steel. Four T-shaped beam-to-column joints were tested under the cyclic loading applied the beam end, which were made by Q390 steel. The experimental results indicate that the composite action of a concrete slab can significantly improve the stability of the beam top flange. The beam-to-column connection with an external-diaphragm is helpful to make a plastic hinge away from the connection and effectively avoid the occurrence of fracture in the vicinity of weld. However, owing to the slab effect, there is the possibility of fracture near the connection for this type connection. All hysteresis curves are stable, showing excellent energy dissipation capacity and ductility. The equivalent viscous damping coefficients of the specimens without slab are slightly higher than that with a concrete slab in the plastic point. And they tend to consistent when the story drift angle reaches 0.05 rad, showing that the combined effect of concrete slab has been ineffective.

关 键 词：外环板式节点 楼板影响 H型钢梁-钢管柱节点 循环荷载试验 抗震性能 

分 类 号：TU317.1[建筑科学—结构工程] TU398.9