State-of-the-Art Review on the Causes and Mechanisms of Bridge Collapse

Deng, Lu; Wang, Wei; Yu, Yang

doi:10.1061/(asce)cf.1943-5509.0000731

Cited by 226 publications

(105 citation statements)

References 113 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This 4D-scour depth falls into the expected range for bridges. 42 Note that this test merely consider the general scour, one of the four main types of scour, 3 for testing expedience. The center-to-center spacing of the 2 × 2 pile-group is 3D, which falls into the normal range (3~4D) in practices.…”

Section: Overviewmentioning

confidence: 99%

“…3 Phenomenally, scour can render the cap and the upper portion of piles exposed without surrounding soils. Saturated soils, particularly cohesionless soils, may liquefy under earthquakes, leading to reductions of soil strength.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, pile foundations constructed in water are often subjected to scour hazard, which is reported to be one of the most severe hazards that cause bridge failures in the US. 3 Phenomenally, scour can render the cap and the upper portion of piles exposed without surrounding soils. Technically, scour can degrade the capacity of foundations and alter dynamic behavior and failure modes of bridges under seismic hazard.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Shake‐table investigation of scoured RC pile‐group‐supported bridges in liquefiable and nonliquefiable soils

Wang

Shang

2019

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

Summary This paper presents results of one‐g shake‐table tests on scoured pile‐group‐supported bridge models in saturated (liquefiable) and dry (nonliquefiable) sands. The primary objective is to reveal the influence of liquefaction on seismic demands and failure mechanism of scoured bridges. To this end, two identical models, each consisting of a 2 × 2 reinforced concrete pile‐group with a center‐to‐center spacing of 3 times pile diameter, a cap and a single pier with a lumped iron block, were constructed and embedded into saturated and dry sands, respectively, with the same scour depth of 4 times pile diameter. Typical test results, including excess pore pressure, acceleration and displacement demands are interpreted first, followed by the focus on curvature demands and associated seismic failure mechanism identification. Finally, inertial and kinematic effects on pile curvature demands are estimated using cross‐correlation analyses. Results show that near‐pile liquefied soils exhibit more remarkable dilation tendency as compared to far field. For bridges under the given scour depth, soil liquefaction tends to significantly affect the failure modes via transferring damage positions from pier bottom to pile head and meanwhile from underground pile to pile head. In addition, pile group effects appear to be significant in nonliquefiable soils while to be relatively inessential in liquefied soils. Moreover, the inertial effect is more prominent in nonliquefiable soils, while the kinematic effect itself generally appears to be more significant in liquefiable soils. The test results can be used to validate numerical models for future studies.

show abstract

Section: Overviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Shake‐table investigation of scoured RC pile‐group‐supported bridges in liquefiable and nonliquefiable soils

Wang

Shang

2019

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

show abstract

“…As a result, several bridges were collapsed due to couples of overloaded trucks. 3,4 Fatigue damage induced by heavy trucks is one of these failure mechanisms as summarized by Deng et al 5 leading to the collapse of in-service bridges. For the short to medium span bridges, the applications of the high strength materials, the design theory that makes full use of strength of materials in high stress condition, and the decreasing dead-to-live-load ratio make them fatigue-sensitive to vehicle loads.…”

Section: Introductionmentioning

confidence: 99%

Lifetime fatigue reliability evaluation of short to medium span bridges under site-specific stochastic truck loading

Yan

Luo

Yuan

et al. 2017

Advances in Mechanical Engineering

View full text Add to dashboard Cite

Bridges are vulnerable to the fatigue damage accumulation caused by traffic loading over the service period. A continuous growth in both the vehicle weight and the traffic volume may cause a safety hazard to existing bridges. This study presented a computational framework for probabilistic modeling of the fatigue damage accumulation of short to medium span bridges under actual traffic loading. Stochastic truck-load models were simulated based on site-specific weigh-inmotion measurements. A response surface method was utilized to substitute the time-consuming finite element model for an efficient computation. A case study of a simply supported bridge demonstrated the effectiveness of the computational framework. Numerical results show that the simulated fatigue stress spectrum captures the probability density functions of the heavy traffic loading. The equivalent fatigue stress range increases mostly linearly in the good road roughness condition with the growth of the gross vehicle weight. The vehicle type and the road roughness condition affect the stress range. The influence of the driving speed on the equivalent stress range is non-monotonic. The bridge fatigue reliability has a considerable increase even under a relatively high overload limit. It is anticipated that the proposed computational framework can be applied for more types of bridges.

show abstract

“…Bridge structures have therefore to be adequately maintained, since structural deterioration combined with the occurrence of hazardous events like earthquakes or floods can compromise structural stability, and lead to bridge failure (Deng et al 2016). In recent years bridge failures induced by natural hazards were drastically increased, due to lack of adequate monitoring and preventive maintenance actions, but also for the higher number of natural disasters that yearly hit different regions worldwide.…”

Section: Introductionmentioning

confidence: 99%

Structural Health Monitoring and Design Code compliance for performance assessment of bridges under scour and seismic hazards

Zanini¹,

Faleschini²,

Ademovic³

et al. 2017

Proceedings of the Joint COST TU1402 - COST TU1406 - IABSE WC1 Workshop: The Value of Structural Health Monitoring for the Reli

View full text Add to dashboard Cite

Abstract. When dealing with asset management of infrastructural systems, maintenance planning of bridges and other critical structures has to be thought against natural deterioration due to environmental conditions, but also taking into account potential criticalities induced by the occurrence of seismic and flood hazards. The aim of this work is to focus on potential damage scenarios, assessment methods for common bridge structures potentially subject to earthquake loading and scouring phenomena due to flooding hazards.

show abstract

State-of-the-Art Review on the Causes and Mechanisms of Bridge Collapse

Cited by 226 publications

References 113 publications

Shake‐table investigation of scoured RC pile‐group‐supported bridges in liquefiable and nonliquefiable soils

Shake‐table investigation of scoured RC pile‐group‐supported bridges in liquefiable and nonliquefiable soils

Lifetime fatigue reliability evaluation of short to medium span bridges under site-specific stochastic truck loading

Structural Health Monitoring and Design Code compliance for performance assessment of bridges under scour and seismic hazards

Contact Info

Product

Resources

About