REHABILITATION OF THE THIRD SHIQIAO BRIDGE BY EXTERNAL PRESTRESSING
In this paper, the cracks on web of the third Shiqiao Bridge are demonstrated by pictures including the location and geometry of those cracks. The deficiencies of performance and cracks due to the incorrect design of web and the lower shear resistance are discussed. In order to suppress the crack propagation and improve the shear strength of the web, the external prestressing method is proposed after several debates. The formation of external prestressing cable, the arrangements and control stress of tendons are explored. Some critical aspects, such as deviator and anchorage, are designed carefully. The analytical model is developed by bridge software, the internal forces and stress have been calculated by computer. By comparison, it can be known that the safety margin increases and the crack propagation can be suppressed efficiently.
Crack propagation ezternal prestressing rehabilitation
Hai-Bo Jiang Wei-Jian Yi Chun-Gen Wei Fei-Xin Huang
Faculty of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006, College of Civil Engineering,Hunan University,Changsha 410082,P.R. China
国际会议
长沙
英文
320-323
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）