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| Analysis ofOptmi ization of Unsupported Cable Force of Steel Frame with Cable Hoisting Method |
| HAN Le,i ZHANG Jun-bing |
| China Railway NO. 3 Engineering Group Co. Ltd,Taiyuan,Shanxi 030001,China |
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Abstract Research purposes: By summing up the advantages and disadvantages of using the torque balance method and the finite element"zero displacementmethod" to determine the cable force, the optimal calculationmethod isused for the LuobuxiBridge to guarantee the linear accuracy in arch rib segmentof the bridge and construction safety.
Research conclusions:The optimal cable force is solvedwith non -linear iterative calculation and taking the cable and frame structure as an integrated structure. Through the iterative calculation and the calculations for the normal assembly and reverse disassembly of the frame segmen,t the optimal cable force before closure is obtained and the control data about tube stress and elevation of the steel tube frame during hoisting the frame are offered. The application shows this method canmake sure that the steel tube frame has the perfect closure condition and the accurate data aboutelevation can be offered. This is significant to guide hoisting the steel tube frame ofLuobuxiBridge.
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Received: 29 July 2009
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2009, Vol. 26 
