建筑结构学报2024，Vol.45Issue(3)：243-254,12.DOI:10.14006/j.jzjgxb.2022.0775
胶合木-CLT组合梁斜螺钉连接的界面受剪性能
Interfacial shear behavior of glulam-CLT composite beams with inclined self-tapping screw connectors
摘要
Abstract
To research the interfacial shear behavior of inclined self-tapping screw(STS)connectors between glued laminated timber(GLT)beam and cross laminated timber(CLT)slab,a series of push-out tests were carried out on six groups of shear specimens for GLT-CLT interfacial connections.The effects of the arrangement,penetration length and number of STS on interfacial shear behaviors were considered in the experimental research.The STS arrangements included shear-tension screws,shear-compression screws and cross inclined screws.The test results show that the load-carrying capacity of the shear-tension screw connections is approximately six times that of the shear-compression screw connections.The load-carrying capacity of the cross inclined screw connections is approximately the sum of the load-carrying capacities of the shear-tension and shear-compression screw connections,and the slip stiffness also conforms to this rule.Based on the revealed failure mechanism of inclined screw connections,the calculation methods to calculate the slip stiffness and load-carrying capacity of shear-tension screw connections based on a rigid model,as well as the slip stiffness and load-carrying capacity of shear-compression screw connections by considering the typical double-hinge damage mode based on the elastic foundation beam theory were proposed.Based on the superposition of shear behaviors of shear-tension and shear-compression screw connections,the slip stiffness and load-carrying capacity of cross inclined screw connections were obtained.The theoretical calculation results are in good agreement with the test results.关键词
组合梁/正交胶合木/自攻螺钉连接/推出试验/理论分析/受剪性能Key words
composite beam/cross laminated timber/self-tapping screw connector/push-out test/theoretical analysis/shear behavior分类
建筑与水利引用本文复制引用
陆言,杨会峰,史本凯,陶昊天,吴明旺..胶合木-CLT组合梁斜螺钉连接的界面受剪性能[J].建筑结构学报,2024,45(3):243-254,12.基金项目
国家自然科学基金项目(52208253,51878344),江苏省卓越博士后计划. （52208253,51878344）
