Non-bracket and Cable erection is the main erecting arch ribs method of a long span concrete-filled steel-tube(CFST) arch bridge recently,but it requires to adjust the cable force over and over again,which increases the degree of construction difficulty and arch axis linear control trouble,delays the project limit time.

However,till now in our country ,there is no design and construction code for concrete-filled steel-tube arch bridge,specification against arch axis variation is also established on previous bridge-constructing performances.

Continuum topology optimization method for arch axis design of arciform aqueducts;

Optimization of spline function curve used as arch axis based on gen etic algorithm

The effects of deformation and internal forces produced by transverse bias of arch axis are analyzed by simulative computing.

Moreover, adjust of the arch axes of this kind of bridge is quite limited and no adjust for the structural figure and stress is available after construction.

In this paper some rules have been attained according to internal forces analyses of in the four designed CFST arch bridges while adopting different arch axial linetypes.