胶合木梁柱角钢混合连接静力与抗震性能试验研究  

Experimental study on static and seismic behavior of glulam beam-to-column hybrid joints with bolted angles

作　　者：陶昊天 毛旻 杨会峰[1] 刘伟庆[1] TAO Haotian;MAO Min;YANG Huifeng;LIU Weiqing(College of Civil Engineering,Nanjing Tech University,Nanjing 211816,China;International Century Design of Architecture CO.,LTD,Changzhou 213022,China)

机构地区：[1]南京工业大学土木工程学院,江苏南京211816 [2]江苏筑森建筑设计有限公司,江苏常州213022

出　　处：《建筑结构学报》2021年第10期114-121,129,共9页Journal of Building Structures

基　　金：国家重点研发计划(2018YFD1100404);国家自然科学基金项目(51878344);江苏省自然科学基金项目(BK20161550)。

摘　　要：为解决传统的木结构销栓连接刚度低、震后可恢复功能弱等问题,将钢结构梁柱翼缘角钢连接方法应用于木结构,提出了一种胶合木梁柱角钢混合连接形式。为研究此类木结构节点的静力与抗震性能,对节点试件进行了单调与低周反复荷载试验。研究结果表明:当梁柱截面尺寸分别为135 mm×420 mm和150 mm×350 mm,连接角钢规格为∟180×110×12时,胶合木梁柱角钢混合连接的极限弯矩达到95.3 kN·m,最大转角接近0.096 rad,初始刚度达4073 kN·m/rad。低周反复荷载作用下,混合连接的变形能力与延性良好,梁端弯矩-转角滞回曲线呈反"S"形,角钢屈服后的大变形使其短肢底部与柱面产生了明显的分离,滞回曲线出现捏缩效应;角钢的短肢翘曲严重,从而使混合连接的耗能能力和等效黏滞阻尼系数均下降。To overcome the low stiffness and weak earthquake resilience of traditional dowel timber connections,by introducing the bolted top-and-seat angle connection used for steel structures,a type of glulam beam-to-column hybrid connection with bolted angles was proposed.To evaluate the static performance and seismic behavior of this kind of connection,the monotonic and reversed cyclic loading tests were carried out.It is found that the ultimate moment capacity,the maximum rotation and the initial stiffness of the proposed hybrid joint reach to 95.3 kN·m,0.096 rad and 4073 kN·m/rad,respectively.These performance are obtained based on using test specimens with geometric parameters that the sizes of glulam beam and glulam column is 135 mm×420 mm and 150 mm×350 mm,respectively,and the angle specification is∟180×110×12.The proposed hybrid joints exhibit great ductile behavior and evident S-shaped hysteretic curves when tested under reversed cyclic lateral loading.Pinching effect is also found in the hysteretic curves after yielding of the angel steel due to large gap between short leg of angle steel and the glulam column.Both the energy dissipation and the equivalent viscous damping coefficient decrease due to the excessive warping of the short leg of the angle steel.

关 键 词：梁柱节点 胶合木 角钢混合连接 静力试验 拟静力试验 受弯性能 抗震性能 

分 类 号：TU366.3[建筑科学—结构工程]