Simplified method for predicting the deflections of composite box girders

Cheng, Jin; Hao, Yao

doi:10.1016/j.engstruct.2016.09.049

Cited by 22 publications

(4 citation statements)

References 21 publications

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“…Ji Wei et al [37] derived a shape function to address the warping caused by shear lag in waveform steel web box girders and proposed a deflection calculation method considering both shear lag and shear deformation. Cheng et al [38] proposed deflection calculation formulas for single-cell and multi-cell waveform steel web composite box girders, assessing the impacts of shear lag and shear deformation on deflection. Ma Chi et al [39] developed beam elements for analyzing shear lag and shear deformation based on analytical solutions of internal forces and displacements in waveform steel web composite box girders.…”

Section: Introductionmentioning

confidence: 99%

Calculation Theory of Shear Stress Distribution in Box Girder with Corrugated Steel Webs Based on the Energy Method

Liu,

Sun

2023

Buildings

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In the shear design of corrugated steel web bridges, the shear stress distribution in the web is a more critical issue. In order to solve the calculation problem of shear stress distribution in corrugated steel webs, an energy-based method of calculating shear stress distribution in corrugated steel webs was proposed. This method uses the energy method as the basic principle, and through the basic idea that the external work is equal to the sum of the longitudinal strain energy and the transverse strain energy of the bridge, the proportion of shear force shared by each web is calculated, and the shear force distribution coefficient characterizes the proportion of shear force shared by each web. The method is applied to calculate the shear stress distribution coefficients of a single-box, six-cell corrugated steel web box girder bridge, and a finite element model of the bridge was established. The finite element calculation results were compared with the results of the energy method to analyze the accuracy of the shear force distribution coefficients of each web calculated by the energy method. The analysis results show that the method can analyze the shear force distribution between multiple corrugated steel webs more accurately and provide a basis for the shear design of this type of bridge.

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Section: Introductionmentioning

confidence: 99%

Calculation Theory of Shear Stress Distribution in Box Girder with Corrugated Steel Webs Based on the Energy Method

Liu,

Sun

2023

Buildings

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“…Moon et al [17] proposed estimated approaches for obtaining the warping constant and determining the shear center of I-girders with corrugated web subjected to uniform bending, and Ibrahim [18] investigated the influence of the corrugated web on the lateral torsional buckling strength of wavy webs. In recent years, the shear lag effect has been the subject of intense scholarly research [19], and Cheng [20] proposed a simple approach for forecasting the deflection of a CBGCSW by taking shear lag effect into consideration.…”

Section: Introductionmentioning

confidence: 99%

Shear Lag Effect and Accordion Effect on Dynamic Characteristics of Composite Box Girder Bridge with Corrugated Steel Webs

et al. 2020

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This study proposed a dynamic characteristic analytical method (ANM) of a composite box girder bridge with corrugated steel web (CBGCSW) by completely considering the impact of shear lag effect and accordion effect of corrugated steel webs. Based on energy principles and variational principles, a vibration differential equation and the natural boundary conditions of a CBGCSW were developed. The analytical calculation formula for solving the vibration differential equation was then obtained. The results calculated using the ANM agreed well with previous experimental results, which validated the correctness of ANM. To demonstrate the superiority of the ANM, the vibration frequencies of several abstract CBGCSWs with varying ratios of span–width, obtained using the elementary beam theory (EBT) and the finite element method (FEM), were compared with those obtained by ANM. The efficacy of the ANM was verified and some meaningful conclusions were drawn which are helpful to relevant engineering design, such as the observation that a higher natural vibration frequency and smaller span–width ratio significantly magnified the shear lag effect of CBGCSW. The first five-order natural vibration frequencies of the CBGCSW were significantly lower than those of the composite box girder bridge with general steel web (CBGGSW), which indicates that the impact of the accordion effect is significant.

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“…Since the 1950s, as one of the important transverse load-bearing components, steel–concrete composite beams have been widely used in industrial buildings, bridge structures, underground structures, long-span structures, and so on. Because of their wide application in engineering, diverse structure, and complex performance, many scholars have conducted in-depth studies on them (Cheng and Yao, 2016; Hui and Wu, 2001; Xiang et al, 2017; Zhang et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the flexural behavior of local prestressed steel–concrete composite continuous box beams

Zhang

Cao

et al. 2020

Advances in Structural Engineering

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The flexural bearing capacities of three composite continuous box beams with different prestressing degrees were tested and studied to investigate the influences of local prestressing bundles on the deflection, relative slip of interface, strain, and redistribution of the internal force of the steel–concrete composite continuous box beam. Results show that the arrangement of local prestress can not only improve the bending stiffness at the mid-span of the composite continuous box beam, but also significantly enhance the ductility. In the design process of the local prestressed composite continuous box beam, the influence of the slip at the middle support should be fully considered, and the deflection could not be taken as a control factor. The internal force redistribution of the local prestressed continuous box beam is lower than that of the ordinary continuous box beam, but it still has good plastic internal force redistribution. The number of prestressing bundles in the negative moment region is the main factor that affects the internal force redistribution of the middle support.

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Simplified method for predicting the deflections of composite box girders

Cited by 22 publications

References 21 publications

Calculation Theory of Shear Stress Distribution in Box Girder with Corrugated Steel Webs Based on the Energy Method

Calculation Theory of Shear Stress Distribution in Box Girder with Corrugated Steel Webs Based on the Energy Method

Shear Lag Effect and Accordion Effect on Dynamic Characteristics of Composite Box Girder Bridge with Corrugated Steel Webs

An experimental study on the flexural behavior of local prestressed steel–concrete composite continuous box beams

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