【作者】 许清风； 朱雷； 陈建飞； 李向民；

【Author】 Xu Qingfeng~1 Zhu Lei~1 Jian-Fei Chen~2 Li Xiangmin~1 (1.Shanghai Key Laboratory of New Technology Research on Engineering Structure,SRIBS,Shanghai 200032,China; 2.The University of Edinburgh,Edinburgh EH9 3JL,UK)

【机构】 上海建科院 上海市工程结构新技术重点实验室； 爱丁堡大学；

【摘要】 本文共进行了7根木梁弯剪区粘贴CFRP布抗剪加固的对比试验研究,试验参数包括CFRP的形式(条带、满布)、纤维方向(45°,90°)、层数(1、2)和位置(侧面、包裹)。研究表明,在弯剪区粘贴CFRP布加固木梁的承载力平均提高28.4%;破坏位移平均提高32.8%。加固木梁的跨中截面应变随荷载增加均仍基本符合平截面假定。加固木梁的初始剪切刚度明显提高;在相同荷载下加固木梁弯剪区侧面中心的最大拉应变和最大压应变均明显小于对比木梁。在弯剪区粘贴CFRP布可有效加固木梁的受剪性能。更多还原

【Abstract】 Seven timber beams shear strengthened with CFRP sheets were experimental studied in the paper.The test parameters include the sharp of CFRP sheets,the orientation of CFRP(45°,90°),the number of CFRP sheets (1 or 2) and the position of CFRP sheets(side,all).The test results show that the ultimate shear strength of strengthened timber beams are averagely increased by 28.4%,and the ultimate deflection also has an average 32.8%increase.The strain distributions along the height of the strengthened beams with CFRP sheets at middle-span are nearly linear during the whole loading process so a plan section remains almost plan.The initial shear stiffness of the timber beams strengthened with CFRP sheets has an obviously increase.This study has shown that bonded CFRP sheets to flexural-shear zone will highly enhance the shear performance.更多还原