Dynamic Demand of Bridge Structure Subjected to Vessel Impact Using Simplified Interaction Model

Fan, Wei; Yuan, Wancheng; Yang, Zhi; Qiu, Fan

doi:10.1061/(asce)be.1943-5592.0000139

Cited by 69 publications

(31 citation statements)

References 1 publication

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“…The previous studies [12][13][14] indicated that the colliding ship can be modelled by a special single-degree-of-freedom (SDOF) system. Based on the ship SDOF model, a simplified interaction model with two degrees-of-freedom (DOFs) (illustrated in Fig.…”

Section: Ship-bridge Interaction Analysis Using 2-dof Modelmentioning

confidence: 99%

“…To date, there are no regularized P-a curves that are widely accepted to represent the ship bow stiffness. Generally, the finite element crush analyses are employed to obtain the basic ship bow force-deformation curves using the numerical models in the previous studies [12][13][14]. Through the explicit dynamic analyses, the ship bow P-a curves are obtained and presented in Figure 3.…”

Section: Ship Bow Force-deformation Curvementioning

confidence: 99%

“…As observed in Figure 3, the strain-rate effect has a significant impact on the P-a curves, and should be considered to accurately define dynamic ship-impact loads on bridge structures. In addition, the depth of pile-cap contact with vessel also has a marked effect on the impact forces [12][13][14]. For the 5,000DWT ship, the effect of pile-cap depth can be considered by [14]:…”

Section: Ship Bow Force-deformation Curvementioning

confidence: 99%

“…All these analysis methods were based upon the use of an elastic-perfectly plastic force-deformation relationships to model barge bow stiffness [11]. However, it was found from our previous studies [12][13][14] that ship bow forcedeformation relationships are more complicated than those of barge bow. Hence, these methods cannot be directly applied to the analyses of ship-bridge collisions.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, these methods cannot be directly applied to the analyses of ship-bridge collisions. Based on the previous studies [12][13][14], a simple procedure is improved in this paper to reasonably determine the dynamic ship-impact loads of bridge structures. Firstly, ship-bridge interaction analyses are conducted using two degree-of-freedom (2-DOF) models.…”

Section: Introductionmentioning

confidence: 99%

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A simple procedure for determination of the dynamic ship-impact load on bridge structures

Fan¹,

Yuan²

2014

WIT Transactions on the Built Environment

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An equivalent static force is usually used to represent vessel-impact load exerted on bridge structures in current bridge design codes. However, this static procedure using the code-prescribed loads cannot consider dynamic effects (e.g. inertial force related to superstructure mass). Hence, the vessel-impact responses of bridges may be significantly underestimated and the structural safety cannot be warranted in practice. In this paper, a simple procedure is proposed to define the dynamic ship-impact loads on bridge structures. Firstly, the equations to determine the duration of loading and the maximum ship-bow crush depth are developed based upon principles of conservation of energy and linear momentum during a collision event. Using the above equations and the relationships between crush depth and time, the dynamic ship-impact loads are determined based on ship bow force-deformation curves (P-a curves). For the generated ship-impact load histories, the amplitude, duration and frequency spectra are compared with the results from the high-resolution finite element analyses of ship-bridge collisions. It is found that these parameters are in good agreement with the high-resolution analysis results and the developed procedure can be readily employed to determine the vessel-impact responses of bridge structures like the time history analysis in seismic design.

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Section: Ship-bridge Interaction Analysis Using 2-dof Modelmentioning

confidence: 99%

Section: Ship Bow Force-deformation Curvementioning

confidence: 99%

Section: Ship Bow Force-deformation Curvementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A simple procedure for determination of the dynamic ship-impact load on bridge structures

Fan¹,

Yuan²

2014

WIT Transactions on the Built Environment

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Utilization of structural health monitoring in long-span bridges: Case studies

Sun

Zou

Zhang

2017

Struct. Control Health Monit.

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Summary Structural health monitoring (SHM) of bridges has gained rapid development in the past few years. This paper describes application of SHM on long‐span bridges in China, with the aim to illustrate its practical value. A short review of its development and practice is firstly introduced. Three case studies are subsequently presented on utilization of SHM data in engineering practice. In the first case study, a ship collision incident is analyzed using SHM data. An alarm is sent and confirmed when the collision occurred, and mode parameters are identified with GPS measurements to evaluate the bridge condition. In the second case study, damage of expansion joints in a suspension bridge is assessed with girder end displacement measurements. Malfunction of viscous damper is found to correlate with cumulative displacement. The results show that cumulative displacement can be used for condition assessment of expansion joints. In the third case study, the performance of tuned mass dampers is evaluated with wind and vibration measurements before and after tuned mass damper installation. Through explanation of these case studies, the paper illustrates how to distill useful insights from SHM data, which could be instructive for further research in this field.

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Experimental and numerical investigation of impact behavior of reinforced concrete slab with different support conditions

Yılmaz

Kıraç

Erdem

et al. 2020

Structural Concrete

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Reinforced concrete (RC) slabs may be subjected to impulsive dynamic loads such as blast and impact during their service period. Many studies related to the impact behavior of RC slabs have been presented. However, comprehensive studies where the effect of the support conditions on the impact behavior of RC slabs has been investigated are still limited. Thus, this study has focused on the effects of the support types and the support layouts on the dynamic responses and the failure modes of RC slabs subjected to impact loads. In the first part of the study, 9 two‐way RC slabs with various support layouts composed of fixed and hinged supports were tested under impact load via the drop‐weight test setup. Two different input impact energies were transmitted to RC slabs during impact loading. The time histories of the accelerations and displacements occurred in RC slabs, and the impact loads acting on RC slabs were recorded. The crack patterns due to the impact load were observed. The dynamic responses obtained by experiments have been interpreted in detail. In the second part, a detailed finite element procedure in which explicit dynamic analysis is performed has been introduced for verification of the experimental results. Good agreement between the experimental and the numerical results has been demonstrated. It has been concluded that proposed finite element procedures can be used for evaluation of the dynamic responses and failure modes of RC slabs under low‐velocity impact load.

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Dynamic Demand of Bridge Structure Subjected to Vessel Impact Using Simplified Interaction Model

Cited by 69 publications

References 1 publication

A simple procedure for determination of the dynamic ship-impact load on bridge structures

A simple procedure for determination of the dynamic ship-impact load on bridge structures

Utilization of structural health monitoring in long-span bridges: Case studies

Experimental and numerical investigation of impact behavior of reinforced concrete slab with different support conditions

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