Failure Analysis on a Curved Girder Bridge Collapse under Eccentric Heavy Vehicles Using Explicit Finite Element Method: Case Study

Shi, Xiuyong; Cao, Zhen; Ma, Haiying; Ruan, Xiaojun

doi:10.1061/(asce)be.1943-5592.0001201

Cited by 38 publications

(12 citation statements)

References 10 publications

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“…For the shape of triangular load pulse with growth time, ζ with a value of smaller or equal to 0.5 is taken. are used for F-F and F-H conditions, respectively, based on the research and accidents statistics [2,[25][26][27]. (4) Load position.…”

Section: Parametric Studies On Daf Of Shear Forcementioning

confidence: 99%

Dynamic Amplification Factor of Shear Force on Bridge Columns under Impact Load

Cao

Shi

et al. 2019

Shock and Vibration

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Shear failure is a common mode for bridge column collapse during a vehicle-column collision. In current design codes, an equivalent static load value is usually employed to specify the shear capacity of bridge columns subject to vehicle collisions. But how to consider the dynamic effect on bridge columns induced by impact load needs further research. The dynamic amplification factor (DAF) is generally used in the analysis and design to include the dynamic effect, which is usually determined using the equivalent single degree of freedom (SDOF) method. However, SDOF method neglects the effect of the higher-order modes, leading to big difference between the calculated results and the real induced forces. Therefore, a novel method to obtain dynamic response under concentrated impact load including the effect of higher-order modes is proposed in the paper, which is based on the modified Timoshenko beam theory (MTB) and the classical Timoshenko beam theory (CTB). Finite element models are conducted to validate the proposed method. The result comparisons show that the results from the proposed method have more accuracy compared with the results from the CTB theory. Additionally, the proposed method is employed to calculate the maximum DAF of shear forces for bridge columns under impact load. Parametric studies are conducted to investigate the effect on the DAF of shear forces including slenderness ratio, boundary condition, and shape and position of impact load. Finally, a simplified formula for calculating the maximum DAF of shear force is proposed for bridge column design.

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Section: Parametric Studies On Daf Of Shear Forcementioning

confidence: 99%

Dynamic Amplification Factor of Shear Force on Bridge Columns under Impact Load

Cao

Shi

et al. 2019

Shock and Vibration

Self Cite

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“…In China, the bridges involved in overturning incidents have three major common characteristics [3,4]: (1) continuous girder bridges, most of which have a single support at each middle pier (single support bridges for short and thereafter); (2) the superstructure is an integral box-section girder; (3) straight girders or curved girders with a large curvature radius. Studies on the analysis and design methods of anti-overturning of continuous girder bridges, especially for single-support bridges, have been conducted by many researchers [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Based on these researches, the Chinese bridge code (MTPRC 2012) [5] added the provisions for anti-overturning requirements of box girder bridges to the previous version (MTPRC 2004) [6].…”

Section: Introductionmentioning

confidence: 99%

Collapse Mechanism and Full‐Range Analysis of Overturning Failure of Continuous Girder Bridges

Song

Deng

2021

Advances in Materials Science and Engineering

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In recent years, failings of girders due to overturning in continuous girder bridges have repeatedly occurred in China. To investigate the overturning collapse mechanism and also to evaluate the rationality of anti-overturning design method using beam element models that are commonly adopted in practical design, detailed 3D finite solid element models of a typical single-column pier three-span continuous box girder bridge were built and a full-range numerical analysis of the models was conducted. The solid models included the prestressing effect and diaphragms. Both boundary and geometric nonlinearities were taken into consideration. Bearings were modeled considering the actual construction and dimensions of pot rubber bearings, the material characteristics and boundary conditions of rubber pads, and the contact properties between each part of the bearings. The analysis results revealed that the behavior of the bridge approached the nonlinear state at the onset of first bearing disengagement; the rotation (overturning) mechanism of the girder was gradually transitioned from deformable-body rotation to rigid-body rotation; all the end and middle bearings had been disengaged totally or locally at ultimate overturning failure. The analysis results also showed that bearing disengagements would lead to the ineffectiveness of the constraint in the transverse direction, which significantly reduced the overturning ultimate load and structural ductility before the final collapse. Prior to the first bearing disengagement, the vertical reactions calculated from the beam model were in good agreement with those from the solid model, while the transverse reactions were not. The behaviors were inaccurate after bearing disengagement in the beam models in which the movement of the rotation axis and transition of rotation mechanism failed to be realized. Reliable transverse stoppers and tensile anchors at bearing sections were recommended to efficiently improve anti-overturning stability and ductility in practical design.

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“…Overloaded trucks also present a serious safety risk. Since 2000, overloaded trucks have caused more than 50 bridges to collapse in China [5][6][7]. In an incident in 2012, four heavy trucks with gross weights of 18.625 t, 153.29 t, 163.59 t, and 149.68 t caused a highway ramp to collapse in the Heilongjiang Province, killing three and injuring five persons [6].…”

Section: Introductionmentioning

confidence: 99%

“…In an incident in 2012, four heavy trucks with gross weights of 18.625 t, 153.29 t, 163.59 t, and 149.68 t caused a highway ramp to collapse in the Heilongjiang Province, killing three and injuring five persons [6]. More recently, in an incident in 2015, four overloaded trucks with gross weights of 117.7 t, 111.4 t, 78.7 t, and 116.7 t caused an interchange ramp to collapse in the Guangdong Province, killing one and injuring four persons [7]. Controlling truck overloading behavior is therefore essential in minimizing structural damage to highway infrastructures and preventing the associated catastrophic failures that threaten public safety.…”

Section: Introductionmentioning

confidence: 99%

Effects of Revised Toll‐by‐Weight Policy on Truck Overloading Behavior and Bridge Infrastructure Damage Using Weigh‐in‐Motion Data: A Comparative Study in China

Huang

Zhou

Zhang

et al. 2019

Advances in Civil Engineering

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Since 2000, overloaded trucks have caused more than 50 bridges to collapse in China. In an effort to ensure the structural safety and extend the service life of the highway infrastructure, the Chinese government has proposed a series of policies in the past decade to mitigate truck overloading. This study aimed at investigating the effects of China’s recently revised toll-by-weight policy on truck overloading behavior and bridge infrastructure damage using weigh-in-motion data that spanned seven years (January 2011 to March 2018) and two successive toll-by-weight policies (with the new one implemented from August 2016), wherein truck data were measured from a typical national freeway segment. We first compared truck traffic volumes, compositions, and weight distributions under the initial and revised toll-by-weight policies. Next, we compared bridge infrastructure performance with respect to safety and fatigue based on the overloaded truck traffic observed under the initial and revised toll-by-weight policies. The results indicated that the revised toll-by-weight policy, which uses a stepwise incremental fee structure based on vehicle weight, was more effective at controlling truck overloading behavior and reducing bridge infrastructure damage than the initial toll-by-weight policy. Under the current policy, average daily truck volumes, overloaded truck proportions, and maximum truck weights decreased significantly. Concurrently, extreme and equivalent load effects for safety and fatigue assessments, respectively, decreased by an average of 20% for small- to medium-span bridges. Despite these noted improvements, overloaded truck traffic persisted, with loads often exceeding bridge design levels. This study’s findings can support future efforts by the Chinese government to further refine their toll-by-weight policies and subsequently ensure a safe and viable transportation network.

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Failure Analysis on a Curved Girder Bridge Collapse under Eccentric Heavy Vehicles Using Explicit Finite Element Method: Case Study

Cited by 38 publications

References 10 publications

Dynamic Amplification Factor of Shear Force on Bridge Columns under Impact Load

Dynamic Amplification Factor of Shear Force on Bridge Columns under Impact Load

Collapse Mechanism and Full‐Range Analysis of Overturning Failure of Continuous Girder Bridges

Effects of Revised Toll‐by‐Weight Policy on Truck Overloading Behavior and Bridge Infrastructure Damage Using Weigh‐in‐Motion Data: A Comparative Study in China

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