当前,全球70%以上的现代建筑采用了预应力技术。预应力技术是现代混凝土桥梁发展的重要组成部分,目前大跨径的桥梁均为预应力结构。我国桥梁方面也有应用预应力技术的案例,如2010年长春富锋特大桥和2015年柳州洛维大桥的加固应用。预应力桥梁是个“大家庭”使用预应力技术,是为了改善结构服役表现,在结构构件承受载荷之前,通过施加预应力的方式预先对使 Currently, more than 70% of the world’s modern buildings use prestressed technology. Prestressed technology is an important part of the development of modern concrete bridges. At present, bridges with long span are all prestressed structures. There are also cases of applying prestressing technology in bridges of our country, such as the reinforcement application of the Fufeng Bridge in Changchun in 2010 and the Luozhou Bridge in Liuzhou in 2015. Prestressed bridge is a “big family ” The use of prestressed technology, is to improve the performance of the structure of the service, before the structural member to withstand the load, by prestressing the way in advance to make