Research On The Accelerated Construction Technology And The Application Of Composite Steel Plate Girder Bridge With Medium-small Span

With the development of society and economy, the construction technology based on standardization, assemblage and informatization has become the prior option in civil and traffic construction. In bridge engineering, the accelerated construction including the prefabrication also has great contribution to solve the problem in middle and small span bridges that the quality can hardly be ensured, the problem of environment is permanent, the process of construction is always slow and the cost of human resource is increasing. Thus, this paper aims at proclaim the concept of accelerated bridge construction of composite steel plate girders based on the combination of composite steel plate girders with accelerated medium-small span bridge construction. Meanwhile, the study has been carried out in standardized structural types of medium-small span composite steel plate girder bridge, basic mechanical performance, and the economic performance. The main contents and conclusions are given as follows:1、A systematic introduction and analysis on domestic and foreign research status on accelerated bridge construction and composite steel plate girder was carried out. A combination concept between composite steel plate girder and accelerated bridge construction had been introduced.2、The introduction and conclusion had been given on domestic and foreign composite steel plate girder bridge. A simplified evaluation criterion based on the accelerated bridge construction was proposed. Through it, two structural types were proposed as the standard structural type. Correspondingly, basic structure dimensions of bridge with span of 20 m, 30 m, 40 m and 4×20m, 4×30m, 4×40m are given in tabulation.3、With regard to the standardized structural types, the calculation methods of lateral load distribution factor and the design route had been recommended. Through numerical analysis, the bending capacity of the composite beam had been studied. For composite beams with same level of shear connection, different stud layouts(centralized or uniformly distributed) had less effect on the capacity. For the design of a stud-centralized composite beam, the level of shear connection had to be considered when a plastic design method was applied.4、The application of proposed technology was studied fousing on the economic performance. For costs of the material, hollow slab concrete bridge, the T-beam concrete bridge, the small box concrete girder and the proposed composite steel plate girder bridge in same spans remain no different. For span in 30 m and 40 m, the T-beam concrete bridge remained highest cost in material, box beam remained lowest and composite beam remained moderate. In consideration of the cost of recycle in material, composite beams were 50~60% of concrete amount in square meter and were about 50% of steel amount in square meter comparing with that of common concrete beams.