Study On Crucial Technique Of Three Main Trusses Steel Bridge With Rigid Cable

The main bridge of Dongguan Dongjiang bridge is a three main trusses steel bridge with rigid cable, is a new double-deck bridge structural style.,It possess advantages of both suspension bridge and steel truss bridge.Through the bridge three-dimensional space simulation and analsys of the mechanical characterisrtic of three main trusses rigid suspenders stiffened steel truss, the displacement variation and force variation features of three main trusses rigid suspender stiffened steel bridge wre obtained,and advanced the method of setting transverse direction camber to remove the stress unbalance of three main trusses.The stresses of big nodes at rigid suspenders is extremely complex,through the node detail simulation model,the node stress distribution property of three main trusses rigid suspender stiffened steel bridge was acquired,and comparing with the model test result.Finally, autooscillation property,wind resistance,earthquake-resistance and other dynamical chacater of rigid suspender stiffened steel truss were analysed.The results of this passage supply a reference for design,manufactory,construction and supervisory of like kind bridges.