型钢加固钢筋混凝土梁的受力分析  

Mechanical analysis of reinforced concrete beams by section steel

作　　者：程正江 李大庆[2] 张树兴[3] 

机构地区：[1]中国市政工程中南设计研究总院,湖北武汉430010 [2]武汉大学土木工程学院,湖北武汉430072 [3]合肥高新股份有限公司,安徽合肥230088

出　　处：《四川建筑科学研究》2013年第5期104-107,共4页Sichuan Building Science

摘　　要：通过对型钢加固钢筋混凝土梁的受力分析,依据所作的基本假定分析了加固前后梁截面的应变及应力变化,推导了加固前后梁的承载力、型钢与梁间剪应力以及加固梁抗弯刚度的计算式;得出型钢加固钢筋混凝土梁可大幅度提高梁的抗弯能力,同时也有效提高梁抗弯刚度的结论;最后提出对加固材料性能和加固前梁上荷载的定性要求。Through the analysis on the section steel reinforced concrete beam and according to the basic assumption, this paper has analyzed the change on the stress and strain of beams ,deduced the bearing capacity of beams and the shear stress between section steel and beam and the calculation of bending rigidity on reinforced beams before and after reinforcement, and then draw a conclusion that reinforced concrete beams strengthening by section steel can greatly improve the flexural capacity of beams, also can improve the bending rigidity of beams. Finally put forward a qualitative requirement on the performance of reinforcement material and the load on beams before reinforcement.

关 键 词：型钢 加固梁 剪应力 抗弯承载力 抗弯刚度 

分 类 号：TU375.1[建筑科学—结构工程]