Experimental study and analysis for the long-term behavior of the steel–concrete composite girder bridge

Zhang, Zejun; Liu, Yongjian; Liu, Jiang; Xin, Gongfeng; Long, Guanxu; Zhang, Tiantao

doi:10.1016/j.istruc.2023.03.052

Cited by 12 publications

(4 citation statements)

References 22 publications

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“…where α is thermal conductivity, α = λ/cγ. Assuming that concrete is a semi-infinite thick slab and the temperature variation is in a harmonic form, the elastic mechanical solution of the thermodynamic issue with the first type of boundary condition can be obtained using Equation ( 5) [41]:…”

Section: Temperature Modelmentioning

confidence: 99%

“…Assuming that concrete is a semi-infinite thick slab and the temperature variation is in a harmonic form, the elastic mechanical solution of the thermodynamic issue with the first type of boundary condition can be obtained using Equation (5) [ 41 ]:

where

is the peak temperature fluctuation on the slab surface;

is circular frequency,

; and

represents distance from the calculation point to the surface of the slab.…”

Section: Overturning Effects Of Bridge In Temperature Fieldmentioning

confidence: 99%

See 1 more Smart Citation

Failure Analysis for Overall Overturning of Concrete Single-Column Pier Bridges Induced by Temperature and Overloaded Vehicles

Wang,

Zhou,

Xue

et al. 2024

Materials

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Several overloaded-induced overturning incidents of girder bridges with single-column piers have occurred in recent years, resulting in significant casualties and economic losses. Temperature, in addition to overloading, may also play a role in exacerbating bridge overturning. To investigate the association between temperature and bridge overturning, an explicit finite element model (EFEM) of a three-span concrete curved continuous bridge considering nonlinearities was developed to simulate overall collapse. The effects of uniform and gradient temperatures on the overall overturning stability of curved and straight bridges were evaluated based on the EFEMs. Furthermore, the temperature–bridge coupling model and temperature–vehicle–bridge coupling model were utilized to examine how gradient temperature influences bridge overturning. The results show that the overall overturning collapse of a bridge follows four stages: stabilization, transition, risk and overturning. Variations in uniform temperature from −30 °C to 60 °C had a negligible effect on the ultimate vehicle weight for bridge overturning, with a variation of less than 1%. As the gradient temperature ranged from −30 °C to 60 °C, curved bridges show less than a 2% variation in ultimate vehicle weights, compared to a range of −6.1% to 11.7% for straight bridges. The torsion caused by positive gradient temperature in curved bridges can exacerbate bridge overturning, while negative gradient temperature in straight bridges can lead the girder to ‘upward warping’, facilitating girder separation from bearings. Monitoring the girder rotation angle and vertical reaction force of bearings can serve as important indicators for comparing the stability of bridges.

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Section: Temperature Modelmentioning

confidence: 99%

where

is the peak temperature fluctuation on the slab surface;

is circular frequency,

; and

represents distance from the calculation point to the surface of the slab.…”

Section: Overturning Effects Of Bridge In Temperature Fieldmentioning

confidence: 99%

Failure Analysis for Overall Overturning of Concrete Single-Column Pier Bridges Induced by Temperature and Overloaded Vehicles

Wang,

Zhou,

Xue

et al. 2024

Materials

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show abstract

“…This study aims to address the issue of web cracking in prestressed concrete box girders by investigating the flexural performance of PC composite girder bridges with steel truss webs, focusing on their failure modes, strain distribution, and deflection characteristics. Researchers have suggested employing various alternatives to concrete webs, such as flat steel plate webs [1], corrugated steel webs [2], or steel truss webs [3], to enhance the mechanical performance of prestressed concrete box girders, as illustrated in Figure 1. Due to the large longitudinal stiffness of steel plate webs, the use of steel plate webs instead of concrete webs is not conducive to the application of the prestress of a box girder [4].…”

Section: Introductionmentioning

confidence: 99%

Bending Performance of a Prestressed Concrete Composite Girder Bridge with Steel Truss Webs

Wang,

Liu,

Chen

2024

Applied Sciences

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An experiment was conducted on a prestressed concrete (PC) composite girder bridge with steel truss webs to investigate its flexural performance. The mechanical characteristics and failure modes of a PC composite girder bridge with steel truss webs was clarified. Finite element (FE) analysis was carried out, and the influence of the girder height-to-span ratio and eccentric loading effect on the flexural performance of a composite beam bridge with a steel truss web was discussed. The method for calculating the cracking bending moment, the bending moment at the rebar yield stage, and the ultimate bending moment of a PC composite girder with steel truss webs was proposed. Key findings include that, in both the elastic and cracking elastic stages, the strain of the bottom and top conforms to the plane-section assumption. Throughout the loading process, there was no occurrence of joint failure or local buckling failure in the steel truss webs; the composite girder ultimately fails due to excessive deformation, indicating that the overall mechanical performance of the composite beam is good. The deflection and stress in the mid-span section decrease with an increasing height-to-span ratio, and there are significant impacts of eccentric loading on deflection and stress. Compared with the results of the FE analysis and test, the calculation methods of the cracking moment, reinforcement yield moment, and ultimate moment of PC composite girders with steel truss webs presented in this paper have a high accuracy.

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“…The steel-concrete composite bridge deck system fully utilizes the tensile strength of steel and the compressive strength of concrete [1,2]. It has been widely adopted in the design and construction of various large-span bridges due to its high structural stiffness, lightweight properties, and reduced deflection [3][4][5][6]. Over the past several decades, researchers have conducted theoretical and experimental studies [7][8][9][10] to verify the excellent performance of the steel-concrete composite bridge deck system during the service life of bridge structures.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of the Bi-Directional U-Ribbed Stiffening Plate–Concrete Composite Bridge Deck Structure

Wei,

Liao,

Liu

et al. 2023

Applied Sciences

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The steel–concrete composite structure is widely used in civil engineering for large-span bridges. Orthotropic steel bridge decks (OSDs) have particularly gained popularity due to their excellent mechanical performance. To address cracking issues in OSDs and concrete in negative moment regions, a novel bi-directional U-ribbed stiffening plate (BUSP)–concrete composite bridge deck is proposed. By using finite element analysis, the mechanical performance is evaluated based on maximum tensile stress and vertical displacement of concrete overlays. Results show that the BUSP–concrete deck outperformed conventional flat decks. It is also found that increasing the height, thickness, and opening width of U-ribs reduced tensile stress and maximum displacement. Adjusting height had the most significant effect on displacement while opening width affected tensile stress the most. Considering material usage, optimizing height is proved to be more effective than adjusting thickness and opening width. Decreasing spacing parameters improved performance but added complexity and reduced construction convenience. These findings will guide the design and optimization of steel–concrete composite bridge deck structures.

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Experimental study and analysis for the long-term behavior of the steel–concrete composite girder bridge

Cited by 12 publications

References 22 publications

Failure Analysis for Overall Overturning of Concrete Single-Column Pier Bridges Induced by Temperature and Overloaded Vehicles

Failure Analysis for Overall Overturning of Concrete Single-Column Pier Bridges Induced by Temperature and Overloaded Vehicles

Bending Performance of a Prestressed Concrete Composite Girder Bridge with Steel Truss Webs

Design and Optimization of the Bi-Directional U-Ribbed Stiffening Plate–Concrete Composite Bridge Deck Structure

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