单层木网壳半刚性节点刚度试验研究  

Experimental Study on the Semi-rigid Joint Stiffness of Single-layer Reticulated Timber Shell

作　　者：周金将 何敏娟[2] 苏炳正 ZHOU Jinjiang;HE Minjuan;SU Bingzheng(Su Zhou Crownhomes Co.Ltd ., Suzhou 215105,China;College of Civil Engineering,Tongji University,Shanghai 200092, China)

机构地区：[1]苏州昆仑绿建木结构科技股份有限公司,苏州215105 [2]同济大学土木工程学院,上海200092

出　　处：《结构工程师》2017年第5期147-153,共7页Structural Engineers

摘　　要：节点刚度对于单层网壳整体稳定影响显著,国内规范规定单层网壳节点应为刚性节点,由于木材本身的特性,节点无法实现刚性连接。通过分析不同的节点刚度与网壳稳定安全系数K之间的关系,论证半刚性节点在单层网壳运用的可行性。同时通过对2种胶合木半刚性节点进行试验,分析节点的破坏形态与破坏机理,获取节点的弯矩-转角曲线,从而计算出节点刚度。分析不同胶合木半刚性节点优缺性,指导在实际工程中的有效运用。The nodes stiffness have a significant effect on the overall stability of the singlelayer latticed shell structure.According to the Chinese National Standards(CNS),the nodes of the singlelayer latticed shell should be rigid joints.While,due to the characteristic of timber itself,the nodes cannot achieve the rigid connections.This paper demonstrates the feasibility of the semirigid connections used in the singlelayer latticed shell through analyzing the relationships between the different node stiffness and the safety factor K of the latticed shell overall stability.Furthermore,two glulam semirigid joints were tested.The mechanism of fracture and the failure mode were discussed through the experiments.The MomentRotation curves of the joints were obtained and therefore the rotational stiffness of the joints was calculated.Finally,the merit and demerit for different glulam semirigid joints were analyzed to give an effective use of guidance in the practical project.

关 键 词：单层网壳 胶合木 半刚性节点 节点刚度 

分 类 号：TU399[建筑科学—结构工程]