A Simplified Approach for Predicting Bridge Pier Responses Subjected to Barge Impact Loading

Sha, Yanyan; Hao, Hong

doi:10.1260/1369-4332.17.1.11

Cited by 28 publications

(11 citation statements)

References 12 publications

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“…Biggs [20] estimated the equivalent mass from the mass density and the assumed deflected shape of the structure. This approach was later adapted by Sha and Hao [21] to model impact on a cantilever column. Wu and Yu [8] equated the fundamental frequency of a structure to that of the SDOF system to determine the equivalent mass.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Influence of global stiffness and equivalent model on prediction of impact response of RC beams

Pham

Hao

2018

International Journal of Impact Engineering

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A spring-mass model is commonly used to predict the impact response of a beam. This type of models usually assumes the beam response is governed by flexural and/or shear response mode in deriving the equivalent structural parameters, i.e. equivalent stiffness and mass. However, it is also well-known that under high-speed impact the response during the impact could be limited to a localized area around the impact point. For such cases, the equivalent stiffness and mass estimated from the global response of the beam do not necessarily give good predictions of beam responses. This study numerically and analytically investigates the effect of the stiffness on the impact behavior of reinforced concrete (RC) beams. The numerical results have shown that the stiffness estimated from the global response does not reflect the true behavior of the beam during the first impact impulse. However, the stiffness governs the behavior of the beams at the final loading and free-vibration phase as the global mode dominates the response. Interestingly, a free beam, which has no boundary constraint, and the reference beam with boundary constraint show an identical behavior during the first impact impulse, demonstrating the impact response of the beam in the initial stage is

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Section: Accepted Manuscriptmentioning

confidence: 99%

Influence of global stiffness and equivalent model on prediction of impact response of RC beams

Pham

Hao

2018

International Journal of Impact Engineering

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“…A penalty friction is defined for the tangential behavior with a coefficient of friction of 0.3 (Sha and Hao, 2013). The simulation method for ship–bridge collision was validated by Sha and Hao (2012, 2014).…”

Section: Finite Element Analysismentioning

confidence: 99%

“…In the existing bridge design codes, the effect of ship collision is considered by applying a static force to the bridge pier. Such simplification fails to consider the effect of the pier geometry, duration of collision, material nonlinearity, and so on (Sha and Hao, 2014). Moreover, since the collision is a dynamic process, the equivalent static analysis may not provide sufficient accuracy in the prediction.…”

Section: Collision Force In Design Codesmentioning

confidence: 99%

“…Consolazio and Cowan (2003) used ADINA ® to analyze the collision force of barge collision against bridge piers with the consideration of different pier sizes and shapes. Sha and Hao (2012, 2013, 2014) and Sha et al (2017) conducted comprehensive research on the collision force. A finite element model of barge–pier was developed in LS-DYNA, and the bridge was simplified as a nonlinear single-degree-of-freedom system.…”

Section: Introductionmentioning

confidence: 99%

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Finite element analysis of long-span rail-cum-road cable-stayed bridge subjected to ship collision

Liu

Gou

et al. 2019

Advances in Structural Engineering

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Ship collision is rare, yet it leads to serious consequences once it occurs, in particular for long-span bridges. This study investigates dynamic responses of a long-span, rail-cum-road cable-stayed bridge under ship collision through finite element analysis. Three ship tonnages were investigated, which are 3000, 5000, and 8000 t, respectively. The displacement, velocity, and acceleration of the bridge under ship collision are analyzed. The collision process is simulated in two explicit steps to improve the computational efficiency. First, the collision force is determined through a collision simulation of the ship to a rigid body that simulates the massive bridge pier. The collision force is then applied to the bridge to analyze the dynamic responses of the bridge. The simulation results of the collision force are compared with four different design codes. Analysis results from different codes show significant discrepancies, demonstrating lack of reliability of the formula recommended by the codes. The results indicate that the maximum displacement and acceleration occur at the top of the bridge pylon. The bridge’s responses under ship collision decrease as the collision angle increases from 0° to 20°.

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“…Sha and Hao [7,8] further studied vessel-pier collisions with an emphasis on structural damages. Base on the numerical results, they proposed simplified equations for a fast estimation of the collision force [9]. Nevertheless, the vessel model in these analyses were typically barges, which have lower and shorter bows than seagoing ships.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Collision Damage and Residual Strength of a Floating Bridge Girder

Sha

Amdahl

Dørum

et al. 2018

Volume 11A: Honoring Symposium for Professor Carlos Guedes Soares on Marine Technology and Ocean Engineering

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For bridges across wide and deep waterways, fixed foundation structures are not possible to be built due to technical restrictions. Alternatively, pontoon supported floating bridges which do not require fixed foundations can be installed. As the girders of floating bridges may have a low clearance from the sea level, a critical design consideration is the capability of the girder to resist the collision of passing ships. It is hence important to investigate the collision response of the bridge girder and evaluate girder residual strength after the collision. In this paper, finite element (FE) models of a ship deckhouse and a floating bridge girder are established. The girder response to ship deckhouse collision is investigated through integrated numerical simulations. Parametric studies are conducted to compare the girder response for various girder designs and collision scenarios. The residual strength of the girder after in damaged condition is also investigated. Based on the numerical results, a residual strength index (RSI) is proposed for fast prediction of the girder damage level based on the absorbed energy.

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A Simplified Approach for Predicting Bridge Pier Responses Subjected to Barge Impact Loading

Cited by 28 publications

References 12 publications

Influence of global stiffness and equivalent model on prediction of impact response of RC beams

Influence of global stiffness and equivalent model on prediction of impact response of RC beams

Finite element analysis of long-span rail-cum-road cable-stayed bridge subjected to ship collision

Numerical Investigation of the Collision Damage and Residual Strength of a Floating Bridge Girder

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