Curved Precast Concrete Bridges State-of-the-Art Report, 2012, 1st Edition

2012 ◽  
Author(s):  
Keyword(s):  
State Of The Art ◽  
Precast Concrete ◽  
Concrete Bridges

State-of-the-Art of Precast Concrete Sandwich Panels

PCI Journal ◽  
1991 ◽  
Vol 36 (6) ◽  
pp. 78-98 ◽  
Author(s):  
Amin Einea ◽  
David C. Salmon ◽  
Gyula J. Fogarasi ◽  
Todd D. Culp ◽  
Maher K. Tadros
Keyword(s):  
State Of The Art ◽  
Precast Concrete ◽  
Sandwich Panels

Seismic-Resistant Precast Concrete Structures: State of the Art

2018 ◽  
Vol 144 (4) ◽  
pp. 03118001 ◽  
Author(s):  
Yahya C. Kurama ◽  
Sri Sritharan ◽  
Robert B. Fleischman ◽  
Jose I. Restrepo ◽  
Richard S. Henry ◽  
...  
Keyword(s):  
State Of The Art ◽  
Precast Concrete ◽  
Concrete Structures ◽  
Seismic Resistant

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

2022 ◽  
Vol 15 (2) ◽  
Author(s):  
Arthur da Silva Rebouças ◽  
José Neres da Silva Filho ◽  
Rodrigo Barros ◽  
Yngrid Rayane Freitas Nascimento ◽  
Pedro Mitzcun Coutinho
Keyword(s):  
Parametric Analysis ◽  
Precast Concrete ◽  
Bending Moment ◽  
3D Models ◽  
Concrete Bridges ◽  
Live Load ◽  
Distribution Factor ◽  
Moment Distribution ◽  
Curved Girders ◽  
Bridge Models

abstract: 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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