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Test method of simulating erosion and fatigue load of prefabricated bridge joints
Published in Hiroshi Yokota, Dan M. Frangopol, Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations, 2021
The research object of this test is derived from the prefabricated concrete box girder bridge in actual engineering. The cross-section of box girder bridge (Lu et al., 2018) is a kind of closed thin-walled cross-section with large torsional rigidity and high cross-section efficiency; at the same time, its top and bottom plates are relatively large, which can effectively bear the positive and negative bending moments, and meet the needs of reinforcement and construction, so it is widely used in modern bridge construction. The prefabricated box girder bridge generally refers to the use of precast prestressed concrete box girder in the construction and then assembled on the site. The precast box girder is connected to each other along the two sides of the upper flange, and the joint (wet joint) between the flange is composed of the steel bars extended from the beam flange and web with prestressed steel bars and cast-in-place concrete, which forms an integrated whole with the box girders on both sides.
Box girder bridges
Published in M.S. Cheung, W. Li, S.E. Chidiac, Finite Strip Analysis of Bridges, 1996
M.S. Cheung, W. Li, S.E. Chidiac
Box girder bridges are very popular for highways because of their high torsional rigidity and good appearance. However, the structural analysis of box girder bridges is a very difficult undertaking because of their complex deformation pattern and stress distribution, especially if the structure is continuous over intermediate supports and includes unsupported stiffening diaphragms. Although both the finite strip method and finite element method can be employed to analyze such bridges, the analysis cost is greater for the latter. In this chapter, the implementation of the finite strip procedure coupled with the flexibility approach is presented as an economical solution for the analysis of box girder bridges.
Long span bridges – current age & design life – a global survey
Published in Nigel Powers, Dan M. Frangopol, Riadh Al-Mahaidi, Colin Caprani, Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges, 2018
J. De Maria, C. Caprani, D. Guo
However, it was also determined that, there is a point where the mechanics and effort required to span a given distance becomes so common place that it is no longer irregular, or special. Box girder bridges, usually associated with ‘short span’, or more common span lengths, can span up to approximately 150 metres. Therefore, to eliminate technology associated with smaller spans, a target was set to obtain details on all bridges across the globe with a main span greater than approximately 150 metres. (Hewson, 2003)
Long-span bridges: analysis of trends using a global database
Published in Structure and Infrastructure Engineering, 2020
Colin C. Caprani, James De Maria
The definition of ‘long span’ is certainly open to interpretation and can even be seen as relative to the material or construction technology used. However, we consider that when people refer to ‘long-span bridges’, they are referring to an absolute measure of length, and not a length relative to a technology. With a view to the construction technology and bridge types commonly associated with long spans, the issue is made more complex by the ever-increasing maximum span of any given bridge technology. For example, concrete box-girder bridges are typically considered for spans up to around 150 m (Hewson, 2003), but where other considerations apply the technology can be pushed much further, for example, the hybrid steel and concrete box-girder 330 m span Shibanpo Bridge in Chongqing, China (Tang, 2010). Nevertheless, in spite of these advances, we elected to exclude from consideration of ‘long-span’ structural forms that predominately act in bending, such as box-girder bridges and to only include those forms shown in Figure 3. Further, only those forms with a main span great than 150 m were included in the database.
Spatial refinement grillage model of box-girder bridges
Published in Mechanics Based Design of Structures and Machines, 2023
Pengzhen Lu, Simin Huang, Dengguo Li, Ying Wu, Yang Li
The box girder bridge has greater bending and torsion stiffness than other cross-sections due to its closed thin-walled cross-section (Zhou et al. 2017; Pancella and Luongo 2021). At the same time, it has the advantages of light weight, saving materials, and reducing project cost. In recent years, it has been widely used in bridge engineering and civil building structures (Agarwal, Pal, and Mehta 2021; Zheng et al. 2021). At present, the analysis methods of box girder mainly include the spatial bar system model, plane beam grillage model, shell element and solid element model. However, the above analysis methods still have many drawbacks such as low accuracy of analysis results, inability to perform local refined analysis, time-consuming calculation and large amount of calculation.