Study On Reliability Of Self-anchored Cable-stayed Suspension Bridge

In this paper,based on the basic theory of the bridge structure analysis and structural reliability,aiming at the complex structure system of bridge reliability problems,studying the reliability of a self-anchored cable-stayed suspension bridge from engineering practice and scientific research innovation angle under serviceability limit state,the main research contents are as follows:1.Based on the research results of reliability theory and development of cable-stayed suspension bridge at home and abroad,focusing on the reliability analysis theory and calculation method of cable-stayed bridge and suspension bridge,making clear the problem existing in the reliability evaluation of self-anchored cable-stayed suspension bridge,determining the objectives,contents and methods of research;2.Based on the main component of bridge structure,establishing the equivalent system of self-anchored cable-stayed suspension bridge,and according to the correlation between the limit state equations of each component,the equivalent system of the structure is simplified,and the equivalent series system of the reliability evaluation of the self-anchored cable-stayed suspension bridge is obtained under serviceability limit state;3.Statistics on the structure force and the effect of the existing reliability theory study based on the results of the analysis,get the probability distribution model and statistical parameters of structural resistance;according to the characteristics of highway bridge under load,dead load and vehicle load are in normal operating state and dense probability model and statistical parameters of the effect of operation conditions and as the basis for analyzing the reliability evaluation of self anchored cable stayed composite bridge;4.Establishing the finite element model of the bridge,and then evaluating the reliability of the main components of the bridge and analyzing the correlation between similar unit force,the simplified equivalent series system for reliability evaluation of the bridge is obtained,and evaluating the reliability of the structural system.