【摘要】 针对预应力混凝土吊车梁存在的问题,结合实际工作条件和结构所处的环境,对其提出初步处理方案。通过对初选方案对比和优选,并结合使用要求,确定采用粘贴碳纤维布方案对吊车梁实施加固。在详细介绍用碳纤维布加固鱼腹式T形截面预应力混凝土吊车梁的设计要点和方案的基础上,给出正截面受弯和斜截面受剪补强加固的计算方法,并提出相应的施工方法以及具体构造措施。加固处理后吊车梁的各项技术指标均达到了设计要求,效果良好。研究成果可为类似工程的应用提供理论和方法上的参考。更多还原

【Abstract】 Treatment schemes are put forward to solve the problems which exist in prestressed concrete crane girders according to real work condition.Through comparing and selecting the initial treatment schemes,sticking to CFRP sheets is chosen to strengthen crane girders.It is introduced that the design points and schemes to strengthen fish-bellied T section prestressed concrete crane girders using CFRP sheets, including the calculating methods of bending and shear bearing capacity as well as strengthening construction program.The examination shows that the technical indices of the crane girder strengthening meet the demands on design. The research results can be a reference in theory and method for the similar engineering.更多还原