Study Of Numerical Analysis On The Effect Of Shear Lag For Box Girder With Corrugated Steel Web PC

This article is mainly to the shear lag effect of corrugated steel web PC composite box girder is studied, and based on the new bridge for practical engineering, the combination of corrugated steel web PC box girder transverse stress transfer in the possibility of working conditions were studied. And influence the shear lag of box beams of corrugated steel web PC combination parameters are studied.First of all, this article tells the story of ordinary concrete in the long-span PC development problems of this goal, the introduction of web use corrugated steel web plate instead of ordinary concrete, which launched corrugated steel web PC composite box girder bridge, to this kind of bridge proved to research the necessity of the shear lag effect, and introduces the combination of corrugated steel web PC box girder bridge, the characteristics of this new type of bridge, tells the story of the advantage of combination of corrugated steel web PC box girder, an d the combination of corrugated steel web PC box girder to the research status at home and abroad, on the shear lag effect this problem also more detailed instructions, mainly expounds the present situation of the study on the shear lag coefficient, the research prospect of shear lag an d shear lag research methods.Then, based on the shear lag analysis was carried out on the new bridge model, the main consideration in concentrated load and uniformly distributed load, load, under the action of gravity and prestressed beam top and bottom of the longitudinal stress and shear lag coefficient changes and the stress of different cross section, the change of the shear lag coefficient, roof and floor is studied the change of the shear lag effect along the longitudinal beam, compares the corrugated steel web plate box girder and the shear lag effect of concrete box girder, analyze s the finite element data and experimental data contrast, preliminary regularity are obtained.Finally, in this paper, the various parameters (external prestressing, loading method, wide span ratio, hanging wing ratio, section forms, flange plate thickness, the thickness of the corrugated steel web plate, etc.) to do some analysis of the influence of shear lag, it is concluded that the initial rules.