（南京工业大学土木工程学院， 南京 211816）

［摘要］制作了3种基于“十字搭扣榫”连接形式的胶合木叠木斗栱模型，对模型进行竖向加载试验及有限元研究，得到了胶合木叠木斗栱的破坏形式、荷载传递规律、荷载-位移曲线。结果表明：胶合木叠木斗栱破坏主要为第一层纵横向木枋受弯，槽口发生劈裂破坏；荷载传递呈“倒三角”形式；竖向承载力相较于传统斗栱提高了近70%；层数越多荷载传递越均匀，延性随着出跳间距的增加而降低；有限元模拟结果与试验结果较为吻合。以江苏省常州市武进区淹城中学体育馆项目中的胶合木叠木斗栱为例，验证了其用于工程项目的可行性。

［关键词］胶合木； 叠木斗栱； 竖向加载试验； 荷载传递规律； 荷载-位移曲线； 出跳间距

中图分类号：TU366-3文献标识码：A文章编号：1002-848X(2020)05-0025-08

Study on mechanical properties of glued laminated wood Dougong and its engineering practice

Wang Chao, Cheng Xiaowu, Cai Jinmei, Sun Xiaoluan, Lu Weidong

(College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China)

Abstract:Three models of glued laminated wood Dougong based on the “cross-shaped tenon” connection form were produced. The model was subjected to vertical loading tests and finite element research to obtain the failure modes, load transfer laws and the load-displacement curve. Results show that the failure of the glued laminated wood Dougong is mainly caused by the bending of the first layer of vertical and horizontal clogs and the splitting of the slot; the load transfer is in the form of an “inverted triangle”; the vertical bearing capacity is increased by nearly 70% compared with the traditional Dougong; the more the layers are, the more uniform the load transfer is, and the ductility decreases with the increase of the cantilever distance; the finite element simulation results are in good agreement with the experimental results. The glued laminated wood Dougong in Yancheng Middle School Gymnasium Project in Wujin District, Changzhou City, Jiangsu Province was taken as an example to verify its feasibility in engineering projects.

Keywords:glued wood; laminated wood Dougong; vertical loading test;  load transfer laws； load\|displacement curve； cantilever distance