建筑结构学报2011，Vol.32Issue(8)：90-98,9.
粘钢加固混凝土梁受剪性能试验研究
Experimental study on shear performance of concrete beams strengthened with steel plates
摘要
Abstract
An experimental study and numerical analysis on eleven reinforced concrete（RC） beams and four partially prestressed concrete（PPC） beams strengthened with U-shaped steel strips were carried out under static loading.The influences of damage degree,ratio of shear span and effective depth of section,stirrup ratio,spacing of the steel strips,level of effective prestressing,and thickness of steel strips on the shear performance of these strengthened beams were investigated.Some conclusions are drawn from the testing and numerical analysis results as follows：（1） The development of inclined cracks can be effectively restrained using the proposed strengthening method with U-shaped steel strips,and the shear load-carrying capacity and ductility of the strengthened RC/PPC beams can be effectively improved.（2） Both strengthened with the same amount of U-shape steel strips,the increase of shear carrying-capacity of a PPC beam is less than that of a RC beam.（3） For damaged beams,the loads causing the yielding of stirrups and steel strips are decreased after strengthening.The shear strengthening effects are more obvious for beams with higher shear span ratios.（4） The proposed nonlinear finite element（FE） model can better predict the shear performance of strengthened RC/PPC beams.The results from FE model agree very well with those from testing.（5） The usable strength of steel strips should be effectively reduced for the shear strengthening design of the practical engineering cases.关键词
混凝土梁/部分预应力混凝土梁/U形钢板箍/抗剪加固/静力试验/非线性有限元分析/受剪性能Key words
RC beam/partially prestressed concrete beam/U-shaped steel strip/shear strengthening/static test/nonlinear finite element analysis/shear behavior分类
建筑与水利引用本文复制引用
林于东,宗周红,陈宏磊..粘钢加固混凝土梁受剪性能试验研究[J].建筑结构学报,2011,32(8):90-98,9.基金项目
福建省节约型交通科技发展项目 （）
