Methods to Determine Stress-Free Lengths of New Stay Cables Replacing Original Parallel-Steel-Wire Stay Cables
This paper presents five rapid calculation methods to determine the stree-free lengths of stay cable replacements under varying data combinations,based on the catenary method and stress-free method,counting the data associated with stay cable forces,intervals of anchorages,original lengths of stay cables and actual locations of anchorages.The methods have been applied to the Bingcaogang Bridge in Panzhihua,to calculate the stress-free lengths of the new stay cables.The effectiveness of these five methods was analyzed.Furthermore,six calculation verification philosophies of the stress-free lengths of new cables were proposed.After thorough evaluation of the documents of the Bingcaogang Bridge and comparison of the plausibility of the six verification calculation philosophies,the stress-free lengths of the new stay cables were given by the stress-free state method,considering the original cable length and measured protrusion of anchorages.After the installation of the stay cables,the anchorages of the stay cables in the pylons and the deck were in the designated locations and were placed under control.
万方数据
维普
