【摘要】 为研究BFRP布加固RC梁的抗弯性能和破坏形态,对3根BFRP布加固后的RC梁和1根普通对比梁进行了抗弯试验,分别测得不同BFRP布层数(1、2、3层)加固下RC梁的挠度、荷载等值,与未加固的RC梁进行了对比分析。并通过有限元软件ABAQUS对试验进行了有限元分析,将得到的有限元模拟结果与试验结果相互对比验证,另外系统地研究了配筋率和BFRP布长度对加固梁加固效果和抗弯性能的影响。结果表明,BFRP布加固层数、配筋率和BFRP布长度3种RC梁影响因素中,BFRP布加固层数的改变对RC梁抗弯性能的影响最为显著,且BFRP布存在最佳配布率和最优加固长度。更多还原

【Abstract】 In order to study the bending resistance and failure characteristic of reinforced concrete bonded beams with BFRP,experimented on three RC beams strengthened with BFRP and one RC beams. The failure modes,loads and the mid-span deflections of the beams reinforced with 1,2 and 3 layers of BFRP at the bottom of the beam were observed respectively and compared with the reference beam. The test beam finite element analysis by ABAQUS and make a contrastive of test results and simulation results. In addition,systematically studies the influence of steel percentage and BFRP sheet length on strengthening effect of reinforced beams. The results show that the amounts of BFRP has the most significant impact on bending resistance. In addition,there is reasonable distribution rate and length in the field of study on RC beams strengthened by BFRP.更多还原