Overheight Vehicle Collisions with Highway Bridges

Fu, Chung C.; Burhouse, J.; Chang, Gang‐Len

doi:10.3141/1865-12

Cited by 45 publications

(28 citation statements)

References 2 publications

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“…In the United States, between 25 and 35 bridges are damaged by colliding overheight vehicles every year, in each state (Fu et al 2003). Classifications for degrees of damage and applicable repair methods are presented in some literature (Kasan 2009).…”

Section: Introductionmentioning

confidence: 99%

Behavior of Laterally Damaged Prestressed Concrete Bridge Girders Repaired with CFRP Laminates Under Static and Fatigue Loading

ElSafty

Graeff

Fallaha

2014

Int J Concr Struct Mater

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Many bridges are subject to lateral damage for their girders due to impact by over-height vehicles collision. In this study, the optimum configurations of carbon fiber reinforced polymers (CFRP) laminates were investigated to repair the laterally damaged prestressed concrete (PS) bridge girders. Experimental and analytical investigations were conducted to study the flexural behavior of 13 half-scale AASHTO type II PS girders under both static and fatigue loading. Lateral impact damage due to vehicle collision was simulated by sawing through the concrete of the bottom flange and slicing through one of the prestressing strands. The damaged concrete was repaired and CFRP systems (longitudinal soffit laminates and evenly spaced transverse U-wraps) were applied to restore the original flexural capacity and mitigate debonding of soffit CFRP longitudinal laminates. In addition to the static load tests for ten girders, three more girders were tested under fatigue loading cycles to investigate the behavior under simulated traffic conditions. Measurements of the applied load, the deflection at five different locations, strains along the cross-section height at mid-span, and multiple strains longitudinally along the bottom soffit were recorded. The study investigated and recommended the proper CFRP repair design in terms of the CFRP longitudinal layers and U-wrapping spacing to obtain flexural capacity improvement and desired failure modes for the repaired girders. Test results showed that with proper detailing, CFRP systems can be designed to restore the lost flexural capacity, sustain the fatigue load cycles, and maintain the desired failure mode.

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Section: Introductionmentioning

confidence: 99%

Behavior of Laterally Damaged Prestressed Concrete Bridge Girders Repaired with CFRP Laminates Under Static and Fatigue Loading

ElSafty

Graeff

Fallaha

2014

Int J Concr Struct Mater

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“…The transport department of Maryland State has set up a special research team to collect the data of bridge-vehicle collisions and employed finite element simulation to analyze the failure mechanism of the crashed bridge (Fu et al, 2004;Russo et al, 2000). MacDonald et al have conducted some crash tests on precast concrete barriers and evaluated the performance of several types of the barriers (MacDonald and Kirk, 2001).…”

Section: Introductionmentioning

confidence: 98%

Dynamic responses and damage analyses of tunnel lining and errant large vehicle during collision

Cui

Lou

et al. 2015

Tunnelling and Underground Space Technology

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“…Overheight collision has become a significant cause for the damage of bridges in the US and across the world. Several case studies and surveys (Feldman et al, 1998;Fu et al, 2001;Dawson and Shenton, 2005, McCann, 1998, Moss, 1990 provide information about fatalities, injuries, and structural damages caused by overheight vehicle collisions and the extent of the problem at the state and at the national levels. Figure 1 shows the extent of damage caused by overheight collision of vehicle with bridges.…”

Section: Introductionmentioning

confidence: 99%

Overheight Collision Protection Measures for Bridges

Sharma¹,

Hurlebaus²

2012

Structures Congress 2012

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Low clearance bridges are susceptible to collision with overheight vehicles. Collisions of overheight vehicles can cause fatalities and injuries to the drivers and passengers of the overheight vehicles, and damage to bridge girders. The repair of the damaged bridges can be costly and time consuming. Overheight collision has become a significant cause for the damage of bridges and the number is expected to rise.A previous work by the authors showed that a protection system called bridge bumper can be designed that maximizes the energy absorption and decreases the likelihood of damages and fatalities. The current work presents the full scale implementation of the bridge bumper to a realistic bridge subjected to overheight collision with a heavy vehicle. A detailed Finite Element (FE) model of the bridge impacted by overheight vehicle is simulated. The unprotected and protected bridge with bridge bumper is analyzed by a full scale non linear transient analysis. The key parameters such as material and geometric properties of the bridge and bridge bumper are varied.The protection system consists of a plate made of steel to distribute the impact energy over a large area called stiff guard (SG). Energy absorbing material (EAM) are used to mitigate the effect of collision. Two materials viz. low density aluminum and visoeleastic material are investigated to maximize the absorption capacity. The system can be designed for any given impact scenario. A realistic impact scenario is simulated and the applicability of the protection system is shown. This is a novel system for the protection of bridge girders from overheight collision. It is a fairly cheap system when compared with the repair and closure costs. It is easy to manufacture, assemble and impalement on the bridge girder. The research can be further extended for the protection of bridge pier, building column against accidental collision or terrorist attacks. Structures Congress 2012 © ASCE 2012Structures Congress 2012 Downloaded from ascelibrary.org by University of British Columbia on 10/05/15. For personal use only.

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Overheight Vehicle Collisions with Highway Bridges

Cited by 45 publications

References 2 publications

Behavior of Laterally Damaged Prestressed Concrete Bridge Girders Repaired with CFRP Laminates Under Static and Fatigue Loading

Behavior of Laterally Damaged Prestressed Concrete Bridge Girders Repaired with CFRP Laminates Under Static and Fatigue Loading

Dynamic responses and damage analyses of tunnel lining and errant large vehicle during collision

Overheight Collision Protection Measures for Bridges

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