Deformation Analysis Of Curved Girder Bridges In Construction Stage

With traffic enterprise booming, the long-span prestressed concrete curved rigid-frame bridge has been growing up rapidly in recent years with its unique predominance of compatibility, economical efficiency, comfortable and so on. But the curve continual rigid frame bridge unified the curve beam bridge and the rigid frame bridge' s stress characteristic, which causes the structure analysis to become complex.Many consults of the massive domestic outer curve beam bridge literature material have been read before writing this paper. And this paper contains such as summarizes the curve beam bridge design and the job practice, elaborates the curve beam bridge studies the present situation and the development at present, analysis curve beam bridge stress characteristic and the influence stress characteristic primary factor, has induced the curve beam bridge analysis theory. Take the Luo-he river especially big bridge as the background, and make use of the large-scale finite element software MIDAS to establish the bridge' s space actual model. Research on the aspect of the curve continual rigid frame bridge construction stage in the dead weight, the influence of concrete shrinkage and creep, pre-stress, traveling carriage load, the concrete wet weight, under the temperature load and two dead load function distortion. To discuss the influence of the curvature change to the curve continual rigid frame bridge stress and the construction stage load. To provide under the bracket construction stage various loads function the structure reasonable camber, its result had provided the basis for the Luo-he river especially big bridge construction control.