The Safety Assessment For Self-anchored Suspension Cable-stayed Bridge

Guided by the solid bridge project, based on the existing bridge safety evaluation method, with the aid of the finite element analysis method, the research and the discussion of the safety assessment for self-anchored suspension cable-stayed bridge has been conducted, mainly studied the content to be as follows:Profited from the existing research results and the domestic and foreign related literature, the bridge construction risk recognition process and method has been discussed, the construction risk recognition methods of the self-anchored suspension cable-stayed bridge has been proposed, confirming the construction risk recognition methods feasibility.According to structure safety evaluation theory, based on the BP network's failure probability law, the finite element computational procedure MIDAS/Civil6.71 has been used to carry on the simulation analysis to the construction process of structure.Through the main risk pattern and the risk factor, the structure limiting condition equation has been established under the main risk pattern, obtaining the structure each construction stage failure probability, the structure goal reliability has been determined by this.Based on grey theory's safety evaluation method, in view of the solid bridge operational phase's risk factor, the safety evaluation to the solid bridge operational phase has been carried on, obtaining the measure results.According to the classification, the security rating standard has been used to measure results.Finally aimed at the risk factor, the corresponding risk regulatory measures has been proposed.