GFRP板-木螺栓连接节点群组效应的受拉试验研究  

Experimental study on the group effect of GFRP-timber bolted connection in tension

作　　者：吴超[1] 张梓箫 许宁 谭力豪 Wu Chao;Zhang Zixiao;Xu Ning;Tam Lik-ho(Beihang University,Beijing 100191,China;The University of Michigan,State of Michigan 48109,U.S.A)

机构地区：[1]北京航空航天大学,北京100191 [2]密歇根大学,美国密歇根州48109

出　　处：《土木工程学报》2021年第1期38-48,共11页China Civil Engineering Journal

基　　金：国家自然科学基金(51978025,51911530208)。

摘　　要：木结构中多采用钢板-木螺栓连接节点,由于木材本身含水率及环境影响,会导致钢板发生腐蚀,从而给结构带来耐久性问题。文章提出采用拉挤成型玻璃纤维增强复合材料(GFRP)板替代钢板作为木结构的连接板,以提高结构耐久性,并且研究了GFRP板-木螺栓连接节点的群组效应。文章通过GFRP板-木螺栓连接节点拉伸试验,研究螺栓直径、螺栓间距、螺栓个数、螺栓列数等关键参数对螺栓连接群组效应的影响,分析节点失效模式和荷载-位移曲线。研究结果表明,GFRP板-木螺栓连接节点的抗拉承载力与螺栓直径和螺栓数量正相关,与螺栓间距无关。最后文章根据试验结果提出GFRP板-木螺栓连接节点考虑群组效应的抗拉承载力计算公式。Steel plate-timber bolt connections are frequently used in timber structures.However,these connections may encounter durability problem due to the corrosion of the steel plates.In this work,GFRP plate is proposed to replace steel plate in timber structures,and the group effect of the proposed GFRP-timber bolt connections is studied for improvements on the durability.Tensile tests of GFRP-timber bolt connections were conducted for the influences of bolt diameter,bolt spacing,number of bolts,bolt rows on the group effect.The failure modes and the load-displacement curves of the connections were reported.Experimental results showed that the tensile capacity of the GFRP-timber bolt connection is proportionally correlated to the bolt diameter and number of bolts,but it is unrelated to the bolt spacing.A design formula for predicting the tensile capacity of the connection,which considers the group effect of the GFRP-timber bolt connection,is finally proposed based on the test results.

关 键 词：群组效应 螺栓节点 玻璃纤维增强复合材料 木材 力学性能 承载能力 

分 类 号：TU599[建筑科学—建筑技术科学]