摘要
结合桥梁加固实例,介绍体外预应力技术在T构桥梁加固中的应用。通过施加体外预应力可主动调节箱梁应力,提高结构承载力,同时还可增加结构刚度,减小正常使用阶段的裂缝宽度和挠度,其具有较高的经济效益。
Using strengthening of the existing bridges as examples,it introduces application of external prestressing technique on strengthening of existing T frame bridges.Through the imposition of external prestressing,box girder can take the initiative to regulate stress,increase load capacity.It not only can increase the structural rigidity,reduce the normal use of crack width and deflection,but also have higher economic benefit.
出处
《交通标准化》
2011年第3期126-130,共5页
Communications Standardization
关键词
体外预应力
T构桥梁
箱梁应力
external prestressing
T-framed bridge
stress of box girder
