Evaluation of Girder Distribution Factor in PSC Girder Bridge with Curved Concrete Slab Based on AASHTO Specifications

Cho, Dooyong; Park, Sunkyu; Hong, Sung-Jong

doi:10.1007/s13369-014-1307-0

Cited by 1 publication

(3 citation statements)

References 13 publications

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“…In the examples studied, with an increase in the radius of curvature, the maximum bending moment in the middle of the bridge span was greater. The results obtained corroborate those found by Nevling et al [11] and Cho et al [5]. This is due to the portion of torsion coupled to the bending moment, arising from the balance formulations of a curved bridge.…”

Section: Global Analysissupporting

confidence: 90%

“…Figure 3 shows the proposed geometry. According to Cho et al [5], the application of curvature in precast prestressed concrete girders is very advantageous, since the steel girders, mostly used in this type of curved layout, have low stiffness to warping. Another factor that contributes to the use of concrete girders is better stability during assembly compared to steel girders.…”

Section: Existing Systems For Curved Precast Concrete Girders Bridgesmentioning

confidence: 99%

“…The numerical modeling of this study (Figure 10 and Figure 11) was based on the 3D model proposed and validated by Cho et al [5], similar to those proposed by Nevling et al [11] in the level 2 model and by Kim et al [7], which uses shell elements (four nodes and six degrees of freedom at each node) for the deck and frame elements (with two nodes and six degrees of freedom at each node) for the girders, connected by rigid links. The numerical modeling of this research was done with the CsiBridge v17 software.…”

Section: D Fem Modelsmentioning

confidence: 99%

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Curved bridges live load bending moment distribution using straight and curved girders

Rebouças

Filho

Barros

et al. 2022

Rev. IBRACON Estrut. Mater.

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The present study focuses on comparative parametric analysis of curved precast concrete bridges using straight and curved I-girders. The live load bending moment distribution for girders was studied using the bridge curvature and its relationship with the results obtained for a straight bridge. FEM 3D models were developed with restrictions on the transverse live load positions and with two different load models types: HL-93 (AASHTO) and TB-450 (NBR 7188, 2013). The parametric analysis results were calculated using the Modification Factor (MF) and the Bending Moment Distribution Factor (BMDF), calculated from the structural analysis of each model at the midspan. Globally, an increase was found in the total bending moment for the curved bridge models in relation to the straight bridge. In the examples herein studied, the larger the bending radius, the larger the maximal bending moment in the bridge center. For the external girders, the MF increases with the increase of the L/R. For the internal ones, the MF decreases with the increase of the L/R. In addition, the occurrence of “Load Shift” was different from the rigid body behavior, for there was demonstrated a different bending moment variation between external girder (G1) in relation to its adjacent (G2). Therefore, the structural behavior of straight (SG) and curved girders (CG) was analyzed, revealing that, in the SG, a significant gap occurred in the BMDF between G1 and G2 girders for all curvatures. For L/R = 0.6, it caused a difference of 17.8% in the BMDF between the G1 and G2 girders, while on the curved girders, a difference of only 6.6% was found.

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Section: Global Analysissupporting

confidence: 90%

Section: Existing Systems For Curved Precast Concrete Girders Bridgesmentioning

confidence: 99%

Section: D Fem Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Curved bridges live load bending moment distribution using straight and curved girders

Rebouças

Filho

Barros

et al. 2022

Rev. IBRACON Estrut. Mater.

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Evaluation of Girder Distribution Factor in PSC Girder Bridge with Curved Concrete Slab Based on AASHTO Specifications

Cited by 1 publication

References 13 publications

Curved bridges live load bending moment distribution using straight and curved girders

Curved bridges live load bending moment distribution using straight and curved girders

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