喷射纤维增强复合材料加固钢筋混凝土梁柱节点抗震性能试验  

EXPERIMENTAL RESEARCH ON SEISMIC BEHAVIOR OF CONCRETE BEAM-COLUMN JOINTS REINFORCED WITH SHOT-FRP

作　　者：杨曌[1] 刘勇 李佳佳 YANG Zhao,LIU Yong,LI Jiajia(Institute of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China)

机构地区：[1]武汉科技大学城市建设学院

出　　处：《工业建筑》2018年第9期187-192,168,共7页Industrial Construction

基　　金：国家自然科学基金项目(51678457);武汉市城建委科技计划项目(201552)

摘　　要：通过对5个十字形钢筋混凝土梁柱节点的拟静力试验，对喷射纤维增强复合材料加固后节点的抗震性能展开了研究，并对喷射厚度、喷射面积和轴压比对加固节点抗震性能的影响进行对比分析。研究结果表明：采用喷射纤维增强复合材料加固钢筋混凝土梁柱节点试件，可以有效提升节点核心区的抗剪能力，使节点破坏模式由核心区受剪破坏转变为梁端受弯破坏，节点抗震性能得到明显改善；在试验轴压比（小于0．4）内，增加轴压比可有效提升试件极限承载力和初始刚度；加固厚度、加固面积的增加可明显提升试件的承载力、初始刚度和延性耗能能力。Through the quasi-static test of 5 cross-typed reinforced concrete beam-column joints, the seismic behavior of joints strengthened by sprayed FRP was studied, and the effects of sprayed thickness, sprayed area and axial compression ratio on seismic behavior of reinforced joints were also compared and analyzed. The results showed that the shot-FRP strengthened reinforced concrete beam-column joints, shear capacity could be effectively improved in the core zone of the joint, the joint failure mode changed from the core area of shear failure into beam flexural failure, the seismic behavior of the joints was obviously improved; when the axial compression ratio was less than 0.4, the increase of axial compression ratio could effectively enhance the ultimate bearing capacity and initial stiffness; the increase of reinforcement thickness and reinforcement area could significantly improve the bearing capacity of the specimen, the initial stiffness and the ductility.

关 键 词：喷射FRP 加固 梁柱节点 抗震性能 

分 类 号：TU352.11[建筑科学—结构工程] TU375