An experimental study on after-fracture redundancy of continuous span two-girder bridges

Park, Yong-Myung; Joe, Woomdoji; Park, Jaebong; Hwang, Min-Oh; Choi, Byung Ho

doi:10.1007/s13296-012-1001-6

Cited by 11 publications

(4 citation statements)

References 5 publications

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“…Recent studies on the reserved capacity of bridges and redundancy evaluation have mainly focused on the steel I-girder and box-girder bridges with a partial or full-depth fracture of one of the girders [14][15][16][17][18][19][20][21][22][23][24][25]. The results of these studies demonstrated a high level of internal redundancy and secondary load paths in the bridge systems.…”

Section: Of 14mentioning

confidence: 99%

“…Parameters considered in this study included flange width to thickness ratio, girder depths, web depth to thickness ratio, number of stiffeners along the span and cross-frame spacing. The effect of lateral cross-frames in continuous span plate-girder bridges with a full-depth fractured girder was considered in the investigations by Park et al [15]. The test results showed that the ultimate capacity of damaged bridge with bracing was about 1.2 times higher than the bridge without bracing.…”

Section: Of 14mentioning

confidence: 99%

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Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder

Abedin

Mehrabi

2020

Infrastructures

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In steel girder bridges, fracture of one girder may occur without noticeable bridge profile changes. It is critical to ensure that the bridge will have adequate capacity to prevent collapse until the next cycle of inspection discovers the damage. It is realized that once one of the bridge girders is fractured, vertical loads need to be distributed through an alternative path to the intact girder(s). In this case, cross-frames can play an important role in transferring the loads and preventing from sudden collapse. This paper investigates the impact of cross-frames on load distribution after a fracture is occurred in one girder. Bridge configurations with different cross-frame spacing were studied using finite element modeling and simulation of the bridge behavior with a fractured steel plate girder. Nonlinear and dynamic solution methods were used for these analyses. Results of this investigation demonstrated the important role cross-frames can play in providing some reserved capacity for the bridge with fractured girder to enhance the bridge redundancy. The contribution of the cross-frames and the behavior of the bridge after fracture in one girder however depends on the configuration of the bridge. A study of the variation of the effect of cross-frames with respect to the number of girders is also included in this paper.

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Section: Of 14mentioning

confidence: 99%

Section: Of 14mentioning

confidence: 99%

Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder

Abedin

Mehrabi

2020

Infrastructures

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“…Recent studies on two-girder bridges mainly focused on the post-fracture redundancy and redundancy evaluation of twin-girder systems, such as those performed by Idriss et al (1995), Tachibana et al (2000), Park et al (2012), Samaras et al (2012), Kim and Williamson (2015), and Lin et al (2013Lin et al ( , 2016 etc. Limited studies on intact twingirder bridges were also performed, mainly focusing on connection details of diaphragm, buckling of main girders, shear-lag effect in slabs etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Steel–Concrete Composite Twin I-Girder Bridges

2020

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A large number of steel-concrete composite twin I-girder bridges have been built in both Europe and Japan, but the lack of redundancy has always been a concern in the U.S. and many other countries. In addition, very few experimental studies have been performed on mechanical performance of such bridges, particularly for the intact twin I-girder bridges. On this background, a steel-concrete composite twin I-girder bridge specimen was designed according to the current highway bridge design specification in Japan. The static loading tests were performed, and two loading conditions including both symmetric loading and asymmetric loading were applied. Load versus deflection relationship and strain development on steel main girders and concrete slab at key sections were measured. The flexural strains on the lateral beam were also measured and reported in this paper to confirm the load transfer between two main girders. In addition, the shear strain of shear connectors (stud, in this study) was also measured to investigate the shear force transmission on the steel-concrete interface. The theoretical values were also provided to compare with the test results from the twin girder specimen under symmetric loading condition. The experimental results indicate that the theoretical analysis can predict the behavior of the twin-girders very well in the elastic stage by considering the effective width of the slab. Performance of each structural components and load transfer paths in such bridges were also discussed.

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“…Jeon et al conducted research on life cycle cost (LCC) optimization in the design of main girders to improve constructability and durability of two- or three- girder plate bridges [ 9 ]. Also, Yun et al, Lin et al, and Park et al tried to improve safety and durability of two- or three- girder plate bridges by focusing on its redundancy [ 10 , 11 , 12 , 13 ]. In addition, high performance and high strength steel member developments for two- or three- girder plate bridges have been performed by Coelho et al, Ricles et al, and Yong et al [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Design Optimization and Structural Performance Evaluation of Plate Girder Bridge Constructed Using a Turn-Over Process

et al. 2017

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A recent trend in bridge construction has been the optimization of the cost-to-performance ratio. The most effective way to optimize the cost-to-performance ratio is to maximize the efficiency of the superstructure. Currently, many bridge engineers and designers favor two- or three- girder plate superstructures, due to their cost advantages. However, research on the performance enhancements of the I-type girder in two- or three- girder plate bridges is lacking. One of the most important performance improvement technologies for the I-type girder is the “preflex” method. In the preflex method, the specimen is inverted during the construction process to apply prestressed cambering to the specimen by using self-weight. However, a problem with the preflex construction method is difficulty with inverting the girder/plate system during the concrete curing process. Therefore, a new inverting system called Turn-Over (TO) wheel was proposed. Using TO wheels, wider variations to the I-type girder design can be achieved. Using this TO construction method, various cross sectional designs of girder plate systems can be considered due to its easiness in inverting the girder/plate system. In this study, the location of concrete confinement sections between the steel I-beams and concrete plates was varied in an I-girder cross-sectional design. Design parameters included effective height, flange thickness, flange width, confining concrete section width, etc. From this study, the optimum cross-sectional design of the I-girder/concrete plate system was achieved. Then, a single 20 m TO girder/plate system and two 20 m TO girder bridges were constructed and tested to evaluate their performance. From the test, failure behavior, load carrying capacity, crack pattern, etc., are obtained. The results are discussed in detail in this paper.

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An experimental study on after-fracture redundancy of continuous span two-girder bridges

Cited by 11 publications

References 5 publications

Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder

Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder

Experimental Study on Steel–Concrete Composite Twin I-Girder Bridges

Design Optimization and Structural Performance Evaluation of Plate Girder Bridge Constructed Using a Turn-Over Process

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