【摘要】 胶合木钢填板螺栓连接节点横纹受力会出现脆性破坏的现象。为研究碳纤维(CFRP)增强对胶合木钢填板螺栓连接节点的横纹受力破坏模式、承载能力和变形能力的影响，考虑CFRP铺设位置和层数，开展销槽承压强度试验，再以螺栓边距、中距、数目、排列方式和CFRP增强方式为参数，开展节点的横纹受拉试验和有限元分析。结果表明：双面或四面粘贴2层或4层CFRP布，销槽承压强度最大可提高171%,离散系数最大可降低84%;CFRP增强节点的破坏模式由脆性破坏转变为延性破坏，极限载荷最大可提高181%,位移延性系数最大可提高625%;增强后螺栓横纹边距和中距可适当减小。基于试验结果及相关规范，给出CFRP增强横纹销槽承压强度和CFRP增强胶合木钢填板螺栓连接节点的横纹受拉承载力表达式，可为工程设计提供参考。更多还原

【Abstract】 Bolted glulam connections with slotted-in steel plates are prone to brittle failure under loading. In order to study the bearing capacity, deformation performance and failure modes of the bolted glulam connections with slotted-in steel plates reinforced by carbon fiber, considering the laying position and number of layers, the dowel bearing strength test was carried out. Then, taking the bolt end distance, middle distance, number, arrangement and reinforce mode as parameters, tension test of the connections perpendicular to grain and finite element analysis were carried out. Test results show that the dowel bearing strength can be increased by 171% and the dispersion coefficient can be reduced by 84% when reinforced by two or four layers carbon fiber in two or four sides. The failure mode of the CFRP reinforced joint is changed from brittle fracture to ductile failure after fiber reinforcing, the ultimate load and displacement ductility factor increase by 181% and 625% maximumly. The edge and middle distance of the bolted joint can be appropriately reduced after reinforcement. The formulas of the dowel bearing strength after CFRP reinforcing and the bearing capacity of CFRP reinforced bolted glulam connections with slotted-in steel plates are given, which can provide reference for engineering design.更多还原