Structural optimization design of bridge main truss based on method of response surface

While carrying on optimization design and reliability design on complicated structures,utilizing the traditional designing method may probably fall across the difficulty of oversized amount of calculation,yet applying the response surface method is one of the approaches for solving this problem effectively.Let the response surface method be combined with the finite element technology,this paper established the deflection of bridge main truss,and the functional expression of bending stress and structural dimensions.And then carried out the structural optimization design on the main truss and finally conducted the finite element analysis and verification on the result of optimization.The result of designing calculation showed that while concerning this kind of problem of truss structural design,the response surfaced optimization design possesses very good application value.