Analysis On Mechanical Characteristics Of Single-box Multi-cell Girder With Corrugated Steel Webs

The pre-stressed concrete composite girder with corrugated steel webs was a new type of steel-concrete composite structure, which was have been extensive used in Japan. and European countries because it makes full use of material characteristics of concrete and steel, and has good mechanical properties and reduced the quantity of the substructure, and reduced the weight of the structure. In recent years, in order to adapt to the needs of the development of the traffic, some highway bridge began to develop widly, and the horizontal width of single bridge has constantly increased, so single box and multi-cell girder bridge become more and more. The study of a single concrete box and multi-cell girder already relatively perfect, but research of multi-cell corrugated steel webs box girders was rare. In order to adapt to the requirements of traffic, and better play the advantages of corrugated steel webs of single-box, the research of single-box multi-cell girder with corrugated steel webs is necessary.This paper introduced firstly the characteristic of the single box girder multi-oven waveform steel webs, including the form of corrugated webs and the shear connectors. Then the advantages and disadvantages of the pre-stressed concrete composite girder with corrugated webs were summarized, when compared to the pre-stressed concrete beam bridge and the pre-stressed concrete composite girder with flat webs. In this paper, combined with the achievements in analyses abroad as well as the data of the constructed bridges, the behaviors of the trapezoidal corrugated steel webs used in the constructed bridges were analyzed theoretically, such as its axial deformation, flexural stress, local, global and interactive buckling stability of corrugated steel webs.The universal finite element software ANSYS was used to modeling analysis the single-box multi-cell girder with corrugated steel webs.Through concentrated loading in midspan as moderate load, partial load and uniform load, simulated and analyzed the influence of beams of different box girder room number to body stress characteristics of single-box multi-cell girder with corrugated steel webs, and gived the rule of deflection and stress distribution. This paper also studies the relationship of shear lag effect and the number of box office of the single box multi-cell girder with corrugated steel webs, the relationship of requency and the numbers of cell and the relationship of relative displacements of roof and floor and horizontal clapboard under the earthquake forces. Through the study of single box, provides the basis of optimized designing single-box multi-cell grider with corrugated steel webs.