Theoretical and experimental study on flexural behavior of prestressed steel plate girders

Kambal, Mahgoub Elhaj Mahgoub; Yang, Jia

doi:10.1016/j.jcsr.2017.12.007

Cited by 41 publications

(18 citation statements)

References 7 publications

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“…Eq. (9). Note that, in practice, suitable safety factors would of course be applied to the resistances of both the cold-formed steel beam and the cable.…”

Section: Comparison Of Sample Fe Results With Analytical Results and mentioning

confidence: 99%

“…The high-strength steel cable is pre-tensioned and anchored at the two beam ends, where the transfer of the prestressing force takes place. In contrast to previous research on prestressed hot-rolled steel beams [8,9], where the cable was located externally and deviators had to be installed along the beam to hold the cable in place, in the proposed system, the cable is housed within the bottom hollow flange of the beam. During prestressing, owing to the eccentric location of the cable, a pre-camber, i.e.…”

Section: Concept Of Prestressed Cold-formed Steel Beamsmentioning

confidence: 98%

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Design of prestressed cold-formed steel beams

Hadjipantelis

Gardner

2019

Thin-Walled Structures

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Structural design rules for prestressed cold-formed steel beams, considering both the prestressing and imposed vertical loading stages, are presented herein. In the proposed approach, the cold-formed steel member is designed as a beam-column using linear interaction equations in conjunction with the Direct Strength Method (DSM), while the prestressed cable is designed by ensuring that its tensile capacity is not violated during the two loading stages. In the present paper, the design approach and the failure criteria, which define the permissible design zone for the prestressed system, are first introduced. The suitability of the design recommendations is then assessed by comparing a set of parametric finite element (FE) results for several combinations of prestress levels, beam geometries and cable sizes, with the corresponding design predictions. Finally, following reliability analysis, the implementation of the design recommendations is illustrated through a practical worked example.

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“…Eq. (9). Note that, in practice, suitable safety factors would of course be applied to the resistances of both the cold-formed steel beam and the cable.…”

Section: Comparison Of Sample Fe Results With Analytical Results and mentioning

confidence: 99%

Section: Concept Of Prestressed Cold-formed Steel Beamsmentioning

confidence: 98%

Design of prestressed cold-formed steel beams

Hadjipantelis

Gardner

2019

Thin-Walled Structures

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show abstract

“…They observed a considerable increase in the yielding and ultimate bearing capacity of steel I-beam [13]. Kambal and Jia derived a finiteelement formulation to investigate the effectiveness of applying the prestressing technique with respect to the flexural behavior of a simply supported steel box girder and they verified it by experimental results [14]. Zhang examined the analytical solutions of the symmetric and antisymetric elastic lateral-torsional buckling (LTB) of prestressed steel I-beams, with rectilinear tendons, under equal end moments and verified the correctness of the analytical solutions by those simulated by using ANSYS [15].…”

Section: Introductionmentioning

confidence: 92%

Control of Natural Frequency of Beams using Different Pre-tensioning Cable Patterns

Fanaie

Partovi

2019

Scientia Iranica

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Sometimes natural frequency of beams is not within the allowable range, regardless of the appropriate shear and bending design. Moreover, every so often structural designers are faced with cases in which it is not possible to increase the beam height. Steel cable is utilized in this research to control the natural frequency of beam due to its important advantages such as low weight, small cross-sectional area and high tensile strength. For the first time, theoretical relations are developed to calculate the increase in pre-tensioning force of steel cables under external loading based on the method of least work. Moreover, the natural frequency of steel beams with different support conditions without cable and with different patterns of cable is calculated based on Rayleigh's method. To verify the theoretical relations, the steel beam is modeled in the ABAQUS software. The obtained results show the theoretical relations can appropriately predict the natural frequency of beams with different support conditions and cable patterns. In addition, simply supported as well as fixed supported beams are pre-stressed with vshaped and modified v-shaped patterns of the cable. According to the obtained results, the modified v-shaped pattern of the cable is more efficient than the v-shaped pattern one.

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“…They figured out considerable increase in the yielding and ultimate bearing capacity of steel Ibeam [17]. Kambal and Jia derived a finite-element formulation to investigate the effectiveness of applying the prestressing technique with respect to the flexural behavior of a simply supported steel box girder and they verified it by experimental results [18]. Zhang examined the analytical solutions of the symmetric and antisymmetric elastic lateral torsional buckling (LTB) of prestressed steel I-beams with rectilinear tendons, under equal end moments [19].…”

Section: Introductionmentioning

confidence: 95%

Controlling the deflection of long beams using different patterns of pre-tensioning cables

2019

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Despite appropriate design of beams under bending and shear, the deflection of long steel beams usually exceeds the allowable range, and therefore the structural designers encounter challenges in this regard. Considering significant features of the cables, namely, low weight, small cross section, and high tensile strength, they are used in this research so as to control the deflection of beams, rather than increasing their heights, and obtain acceptable responses. In this study, for the first time, theoretical relations are developed to calculate the increase in pre-tensioning force of cables under external loading based on the method of least work as well as the deflection of of steel beam with different support conditions and cable patterns based on the virtual work method. To verify the theoretical relations, the steel beam is modeled in the finite element ABAQUS software. The obtained results show that the theoretical relations can appropriately predict the deflection of beam with different support conditions and cable patterns. In this study, simply supported as well as fixed supported beams are pre-stressed with V-shaped and modified V-shaped patterns of the cable. According to the obtained results, the modified V-shaped pattern of the cable is more efficient than V-shaped pattern one.

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Theoretical and experimental study on flexural behavior of prestressed steel plate girders

Cited by 41 publications

References 7 publications

Design of prestressed cold-formed steel beams

Design of prestressed cold-formed steel beams

Control of Natural Frequency of Beams using Different Pre-tensioning Cable Patterns

Controlling the deflection of long beams using different patterns of pre-tensioning cables

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