Safety Assessment of Continuous Beam Bridges under Overloaded Customized Transport Vehicle Load

Han, Wanshui; Yuan, Yangguang; Xiao, Chen; Xie, Qiang; Gao, Guangzhong; Zhang, Jingfeng

doi:10.1061/(asce)be.1943-5592.0001222

Cited by 5 publications

(9 citation statements)

References 30 publications

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“… ϕ i , ratio and ϕ i , critical denotes the load effect ratio and critical load effect ratio of the i th bridge. The former researches had pointed out that serious durability problems of concrete bridges are mainly caused by bending deformation or bending cracks (Germaniuk et al, 2016; Han et al, 2018a; Ma et al, 2020). Hence, in equation (1), the bending moments are employed to calculate ϕ i , ratio .…”

Section: Serviceability Based Permit Checking Methodsmentioning

confidence: 99%

“…To investigate whether the SLS based permit checking criterion is crucial or the ULS based permit checking criterion, the critical load effect ratios correspond to v = 20% in Figure 9(a), and together with the load and resistance information provided in Table 2, are employed to conduct a ULS safety checking. The reliability based safety checking formulation, which had been proposed in the former research of the authors, is written as (Han et al, 2018a):…”

Section: Uls Safety Checking Based On Critical Load Effect Ratiomentioning

confidence: 99%

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Permit checking of overloaded customized transport vehicle based on serviceability limit state reliability of concrete bridges

Yuan

Han

et al. 2020

Advances in Structural Engineering

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To increase the authorization efficiency of overloaded customized transport vehicle (CTV), a serviceability limit state (SLS) reliability based permit checking method for concrete bridges is proposed through the optimization towards critical load effect ratio. In this procedure, the SLS reliability of crack width and the SLS reliability of concrete stress in tensile region are analyzed for reinforced concrete (RC) and prestressed concrete (PC) structures, respectively. The durability requirements and a unified reliable level can be concentrated reflected by the optimized critical load effect ratio. The results show that it is unreasonable to take a uniform target reliability index for all routes in permit checking of CTV, a stricter authorization criterion should be adopted for a higher expected authorization frequency. For a specific route level, a fluctuant variation of critical load effect ratio can be found with the increasing of bridge span. By introducing an ultimate limit state (ULS) based safety checking procedure, it is found that the SLS based permit checking criterion is crucial and determinative for the authorization of CTV instead of the ULS.

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Section: Serviceability Based Permit Checking Methodsmentioning

confidence: 99%

Section: Uls Safety Checking Based On Critical Load Effect Ratiomentioning

confidence: 99%

Permit checking of overloaded customized transport vehicle based on serviceability limit state reliability of concrete bridges

Yuan

Han

et al. 2020

Advances in Structural Engineering

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“…It is noteworthy that a grillage VBI model has been developed by the coauthor following similar procedure except that the bridge is modeled by the grillage method with beam elements. e grillage model has been successfully applied to investigate the bridge behavior including displacement and internal force under dynamic vehicle load [3,20] and is selected here as a compared counterpart of the present solid VBI model.…”

Section: Advances In Civil Engineeringmentioning

confidence: 99%

“…It is well accepted that VBI is influenced by many factors including the bridge structure (e.g., span length and natural frequency), road surface roughness, vehicle suspension system, vehicle weight and vehicle speed, etc. Due to the complexity of VBI problem and the high cost of field test including difficulties in data collection, numerical VBI analyses have been widely employed to investigate bridge behaviors under dynamic vehicle loads [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Most numerical VBI analyses are based on the finite element method (FEM), in which the bridges are modeled by different types of element such as beam element, plate/shell element and solid element. In the beam-based bridge models [3,4], the bridge is simplified as a beam axis or a grillage with cross-sectional properties assigned to each beam element.…”

Section: Introductionmentioning

confidence: 99%

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Refined Vehicle‐Bridge Interaction Analysis Using Incompatible Solid Finite Element for Evaluating Stresses and Impact Factors

Xie

Han

Yuan

2020

Advances in Civil Engineering

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e vehicle-bridge interaction can induce bridge vibration and consequently fatigue, durability deterioration, local damage, and even collapse of bridge structure. In this paper, a solid vehicle-bridge interaction (VBI) analysis method is developed to provide refined analysis on the bridge responses including displacement and local stress under vehicle loads. e incompatible solid finite element (FE) is introduced to model the bridge, where the element shear locking is alleviated by incompatible displacement modes without sacrificing the computational efficiency. Benchmark example shows the incompatible solid element has superior computational efficiency compared to the conventional solid element. By virtue of the mass-spring-damper vehicle model, the interaction between vehicle and bridge is simulated with point-to-point contact assumption and the coupled dynamic equations are solved via nonlinear iteration. A case study on a simply supported T-girder bridge is conducted to validate the developed solid VBI analysis method and then the dynamic impact factor (DIF) of the bridge is evaluated based on the computed stress results and compared to code values. Results show that the solid VBI analysis method yields more accurate time-history bridge responses including displacement and stress under moving vehicles than the grillage method despite higher computational cost. Particularly, it can simulate realistic stress distribution and concentration along any concerned sections as well as in local components, which can provide detail information on the bridge behavior under dynamic loads. On the other hand, the DIF based on the computed stress result generally agrees well with the code values except for heavy vehicles where the stress-based DIF is slightly higher than the value in Chinese code while lower than that of AASHTO, suggesting the value specified by Chinese code may underestimate the DIF of heavy vehicles in certain circumstances to which more attention should be paid.

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Study on impact factors of small- and medium-span bridges under the special-purpose vehicle load

et al. 2022

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Safety Assessment of Continuous Beam Bridges under Overloaded Customized Transport Vehicle Load

Cited by 5 publications

References 30 publications

Permit checking of overloaded customized transport vehicle based on serviceability limit state reliability of concrete bridges

Permit checking of overloaded customized transport vehicle based on serviceability limit state reliability of concrete bridges

Refined Vehicle‐Bridge Interaction Analysis Using Incompatible Solid Finite Element for Evaluating Stresses and Impact Factors

Study on impact factors of small- and medium-span bridges under the special-purpose vehicle load

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