Structural evaluation of a GFRP truss girder for a deployable bridge

Teixeira, Ana Maria Abreu Jorge; Pfeil, Michèle S.; Battista, Ronaldo C.

doi:10.1016/j.compstruct.2013.11.014

Cited by 39 publications

(13 citation statements)

References 6 publications

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“…In particular, these features are ideal for new bridge constructions, such as bridge decks [6,7], footbridges [8,9], vehicular bridges [10,11] and emergency bridges [12,13]. If the pultruded FRP profiles are further implemented in favorable structural forms, e.g., planar [14,15], triangular [16,17], rectangular [18], spatial [19] and latticed trusses [20,21], the advantages of both the materials and the structures will be greatly extended [22][23][24][25]. Finally, further weight reduction and initial cost effectiveness could be achieved.…”

Section: Introductionmentioning

confidence: 99%

“…For the design of dismountable truss bridges assembled from pultruded FRP profiles, a key technique is to conceive and design appropriate connections that can exploit the advantages of high stiffness and strength [22]. To date, the usual jointing techniques for pultruded FRP profiles are bolted and bonded connections [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…However, the load-bearing capacity of these basic techniques is low and they are mainly applied to planar panels rather than tubular member profile [29]. In response to this issue, several new jointing techniques were developed [22][23]30] to address the inappropriate joint designs, which contribute much to the application of FRP materials in heavy-traffic bridges [22][23]30]. A novel jointing technique termed the pre-tightened teeth connection (PTTC) was proposed [31].…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical study of the torsional response of a modular hybrid FRP-aluminum triangular deck-truss beam

Zhang

Zhao

et al. 2017

Engineering Structures

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A hybrid fiber-reinforced polymer (FRP)-aluminum modular space truss emergency bridge has been designed that consists of two triangular deck-truss beams incorporating a new structural form and advanced pultruded FRP profiles. As a fundamental investigation, this paper explores the detailed torsional behaviors of the new triangular deck-truss beam. A full-scale specimen was prepared and tested under pure torsion to evaluate the representative structural performances. A three-dimensional finite element model (FEM) was constructed and validated with experimental results showing good comparisons. Furthermore, the torsional behavior of the triangular deck-truss beam was numerically investigated by removing individual primary truss members to clearly understand the torsional mechanism. It was found that the beam exhibited a specific and unfavorable mechanical behavior prohibiting full utilization of the FRP material' potential. The external torsional moment is primarily resisted by the torsion of the longitudinal profiles and the in-plane bending of the bilateral Vierendeel trusses rather than the out-of-plane bending of the web diagonals. Possible improvement and optimization procedures are further suggested for this beam when solely used as a structure subjected to off-axis load or pure torsion.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical study of the torsional response of a modular hybrid FRP-aluminum triangular deck-truss beam

Zhang

Zhao

et al. 2017

Engineering Structures

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“…The rapid emergency bridging systems are critical for the survival of military personnel and those affected by natural disasters. In response to the advanced emergency bridging systems, the primary requirements are lightweight for transport facilities, high strength, modular feasibility, reduced assembling, and erection time (Pfeil et al, 2009;Teixeira et al, 2014). These requirements can be efficiently achieved by incorporating preferred truss structures and advanced pultruded fiberreinforced polymer (FRP) materials, which have been increasingly making their way into the field of bridge engineering due to their excellent features, such as high stiffness, high strength-to-weight ratios, sufficient durability, and faster installation times (Awad et al, 2011;Hollaway, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…These requirements can be efficiently achieved by incorporating preferred truss structures and advanced pultruded fiberreinforced polymer (FRP) materials, which have been increasingly making their way into the field of bridge engineering due to their excellent features, such as high stiffness, high strength-to-weight ratios, sufficient durability, and faster installation times (Awad et al, 2011;Hollaway, 2010). The advanced FRP truss structures have been used in a number of emergency bridges (Kostopoulos, 2005;Pfeil et al, 2009;Robinson and Kosmatka, 2008;Sasaki and Nishizaki, 2010;Teixeira et al, 2014;Wight et al, 2006). In these emergency bridges, each trussed member is mainly subjected to axial loading, and the material strength is directed along the load transfer path.…”

Section: Introductionmentioning

confidence: 99%

Analytical solutions of the torsional mechanism for a new hybrid fiber-reinforced polymer–aluminum twin-trackway space truss bridge

Zhang

Zhao

et al. 2016

Advances in Structural Engineering

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For emergency purposes, a lightweight space truss bridge was designed. The bridge is composed of twin triangular deck-truss beams incorporating new structural forms and advanced fiber-reinforced polymer profiles. As a new structure, the structural properties of its triangular deck-truss beam have been studied in detail; however, a design-oriented study facilitating the application of the entire twin-trackway bridge under pure torsion remains to be undertaken. The objective of this article is to analytically explore the torsional mechanism of the twin-trackway bridge, which is characterized by torsional angle and torsional stiffness. To verify the derivation procedures and formulae, the pure torsion test and numerical analysis are conducted on a full-scale specimen. The results indicate that the analytical solutions compare well with the experimental and numerical results. The torsional moment is primarily resisted by the vertical bending of twin triangular deck-truss beams. The simplified analytical model can be used with sufficient accuracy for the design of the bridge.

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Evaluation of the off‐axis and on‐axis tensile creep behavior of glass‐fiber reinforced polymer unidirectional lamina

Gao,

Zhao,

Sun

2024

Polymer Composites

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The off‐axis creep behavior of glass‐fiber reinforced polymer (GFRP) unidirectional lamina is crucial for engineering structural applications. A unified prediction model for time‐dependent off‐axis and on‐axis tensile creep strain in GFRP lamina is developed. The model, analogous in form to the one‐parameter plasticity model, accounts for off‐axis creep deformation separately for elastic and plastic response stages, incorporating a correction term to describe on‐axis creep deformation. The accuracy of the model is confirmed through tensile creep tests on unidirectional lamina at angles of 0, 15, 30, 45, 60, and 90 degrees. The model successfully predicts of creep deformation in the elastic and plastic response stages, respectively. The effects of creep stress, creep time, and off‐axis angle on the creep behavior are investigated. The optimal test angles for predicting off‐axis creep behavior using only two off‐axis angles' creep tests are analyzed. The dominant factors of creep behavior at various off‐axis angles are evaluated. The findings of the study include recommendations for lay‐up configuration and engineering applications of GFRP composites.Highlights A unified creep strain prediction model for GFRP lamina was developed. Creep strain was calculated separately in elastic and plastic response stages. The link between stress, time, angle and creep behavior was determined. The optimal test angles for predicting off‐axis creep behavior were evaluated.

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Structural evaluation of a GFRP truss girder for a deployable bridge

Cited by 39 publications

References 6 publications

Experimental and numerical study of the torsional response of a modular hybrid FRP-aluminum triangular deck-truss beam

Experimental and numerical study of the torsional response of a modular hybrid FRP-aluminum triangular deck-truss beam

Analytical solutions of the torsional mechanism for a new hybrid fiber-reinforced polymer–aluminum twin-trackway space truss bridge

Evaluation of the off‐axis and on‐axis tensile creep behavior of glass‐fiber reinforced polymer unidirectional lamina

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