Galloping analysis for the transient main cables of long-span suspension bridges during construction

We introduce the zero method principle which can calculate initial stress while gravity act and the iterative method which can determine the cable shape.

In order to calculate the cable shape of suspension bridge with spatial cables at bridge completion stage and cable finish stage,a 3-dimensional analysis model is used and an numerical-analytical method is proposed,the effect of saddle and coupling between cable and hanger are also considered.

Using numerical-analytical method,considering the influence of saddle,the calculation principles and procedures for cable Linetype of finished bridge state of cable-stayed suspension bridge were introduced,and a new method for calculation of cable shape and saddle predisplacement of cable finished stage was given.

Segmental catenary method of calculating the cable curve of suspension bridge;

It consists of two parts, calculation of cable curve for suspension bridge and geometric nonlinear analysis of bridge structure.

According to the strong geometric nonlinear character of long-span suspension bridges, this thesis has explored the calculation of cable curve for suspension bridge and geometric nonlinear analysis theory of suspension bridge.