Experimental Study On Cables Performance Of Bridges In Service

The cable-stayed bridge is a cable-stayed bridge with a plurality of the tension on the tower bridge. As one of the important bridge of long span bridge, the cable-stayed bridge design, construction has been rapid development in the world, China cable-stayed bridge construction are among the highest in the world.However, in the early construction of the cable-stayed bridge, the technology development, the original design level is low, the vehicle load increasing, the level of Construction Co., the effects of natural and human factors and a variety of unpredictable variation and other reasons, led to the declining performance of bridge structure, damage increased, the bearing capacity of the original continue to reduce, cable, cable corrosion protection failure occurs, the anchor head, fracture seepage disease, unable to meet the existing traffic load level, the cable is not up to the design life, advance for cable.The industry standard maintenance related city of bridges in our country expressly provides that: only when the wire cable rupture area has a more than 2% of the total area of the cable wire, or when a cable wirecable corrosion area over the total area of 10%, must carry on the cable replacement. At present, theinspection method, inspection equipment and inspection conditions, the custody unit in daily inspection process, not to conduct a comprehensive inspection of the cable corrosion situation, only through the special inspection to detect. But there is no unified detection method, the detection index standard. This paper starting from the diseases of cable of cable-stayed bridge, the routine inspection, special inspectionof the old cable for laboratory testing and other means, the full analysis of cable damage, combined with partial cable-stayed bridge cable replacement time and disease characteristics, the influence factors on thecable disease, and summarize the experience of management and maintenance.This paper through the theoretical research on the detection method of cable-stayed bridge cable, the cabledamage performance test, and combined with the analysis of a series of test Chongqing lijiatuo Yangtze River bridge cable, in-depth study of the evaluation, analysis and study, put forward suggestions on cable stayed bridge diseases, provide guidance for the maintenance of the cable as the bridge of the custody unitlater. At the same time, also provide reference for the improvement of the standardized management ofcable-stayed bridge and cable-stayed bridge design, construction.