Seismic Retrofit of a Three-Span RC Bridge with Buckling-Restrained Braces

Wang, Yuandong; Ibarra, Luis; Pantelides, Chris P.

doi:10.1061/(asce)be.1943-5592.0000937

Cited by 57 publications

(17 citation statements)

References 18 publications

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“…Buckling-restrained braces can seismically rehabilitate bridges in the transverse direction [55], but the current bridge is already seismic-resistant in the transverse direction. Also, steel jackets are proper tools for shear retrofitting of the bridge [56,57].…”

Section: Using Cfrp Sheets (Retrofit Scenario In the Operation Stage)mentioning

confidence: 95%

Life-Cycle Cost Analysis (LCCA) of RC Bridges Subjected to Multiple Hazards

Asadi

Ranjkesh²,

Hamedani³

2020

Scientia Iranica

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The main structural elements of reinforced concrete (RC) bridges deteriorate with time under such uncertain hazards as scouring and corrosive conditions. In this paper, a multi-hazard framework is proposed to assess the performance of bridges subjected to the main effective uncertain natural hazards during their lifetime. In this assessment, the uncertainties associated with the combined effects of multiple hazards including pier scour, earthquake, carbonation, and corrosion are considered. Therefore, for each of the hazards, their severity relationships have been extracted over time, and the effects of these hazards on concrete elements are presented as resistance dimming parameters. The annual and cumulative losses due to these hazards in unit currency are estimated using the life-cycle costs. For decision making, the present value of the expected cumulative cost associated with the retrofit or design scenarios is evaluated using a cost-benefit analysis. The results for a case study bridge, using the proposed framework, indicate the significant impact of the different scenarios on reducing the expected value of damages or incurred losses due to multiple hazards.

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Section: Using Cfrp Sheets (Retrofit Scenario In the Operation Stage)mentioning

confidence: 95%

Life-Cycle Cost Analysis (LCCA) of RC Bridges Subjected to Multiple Hazards

Asadi

Ranjkesh²,

Hamedani³

2020

Scientia Iranica

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“…Yuandong Wang et.al. [3] suggested seismic retrofit methods of a three-span R.C. bridge introducing Buckling-Restrained Braces (BRB) between bent columns which redistribute and dissipate energy in the transverse direction of the bridge.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of Existing R.C. Bridges Against Earthquake Forces

Manasa

KodandaRamarao²,

Srinivasul³

et al. 2022

Preprint

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Performance of bridges against earthquake forces is different from buildings and other kind of structures as bridges are long and narrow, and support fleeting populace on highways or railways. Earthquakes with magnitude greater than 6.0 are capable of damaging or sometimes leading to even collapse of lifeline bridges, resulting in human and socio-economic losses. The extent of earthquake damage depends on the location of bridge close to the nearest seismic zone, structural configuration, ductility demand, age, and characteristics of the soil below foundation. Many failure examples during recent past earthquakes demand the scientific community and civil engineers, the importance of designing bridge structures against seismic forces; particularly when they built on loose soils. Vertical and lateral loads are resisted by the frame action of the superstructure and substructure of the bridge. Abutments and piers or supporting columns resist lateral forces in proportion to their relative stiffness. The vulnerability of any bridge during an earthquake is mainly due to the lateral displacements which cause large shear and flexure in pier or abutment and lead to failure at connections between the pier top and superstructure, or pier bottom and foundation. In the present study, an example of a two-lane and four spanned R.C. T-beam bridge across a canal, located in seismic zone III, is chosen for carrying out dynamic analysis against seismic forces and checked whether the bearing seat width provided at top of abutment and pier is safe or not, against the horizontal displacement of abutment and pier, obtained from the analysis due to seismic forces.

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“…Because many bridges are located in seismic areas, they may suffer irreparable damage or even collapse when exposed to strong earthquakes [1]. Bridge damage is usually caused by superstructure movement, joint failure, bent damage of the column due to shear or flexure, and abutment failure .…”

Section: Introductionmentioning

confidence: 99%

Experimental and finite element study of one span concrete bridge bent designed by the requirements of the 1970s, under gravity and lateral load

Bahrani

Nooralizadeh

Sharify

et al. 2022

NMCE

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In recent years, there has been a growing seismic demand for existing bridges and the final redesign of bridges, especially after a major earthquake One method to strengthen concrete frames on bridges is to use steel sheets or profiles to use the confining force. During this study, a sample at 30% scale under gravity and lateral cycle loading was examined within the laboratory. A finite element model is additionally used to compare the behavior of laboratory samples. The laboratory sample was a model of a typical bridge in iran that was generally designed with deficient detailing requirements in agreement with the typical regulations of the 1970s. A finite element analysis set was used to evaluate various parameters in improving the behavior of the laboratory sample. The finite element model correctly predicted the weakness of the model. Subsequently, a reinforced specimen was investigated by increasing the prestressing force within the concrete beam and the thickness of the frp sheets utilized in the bridge pier by the finite element method. The results show the energy absorbed within the hysteresis curves improved the propagation of the failure. The result also showed that a 100% increase in the prestressing load caused a 67% increase in resistance .

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Seismic Retrofit of a Three-Span RC Bridge with Buckling-Restrained Braces

Cited by 57 publications

References 18 publications

Life-Cycle Cost Analysis (LCCA) of RC Bridges Subjected to Multiple Hazards

Life-Cycle Cost Analysis (LCCA) of RC Bridges Subjected to Multiple Hazards

Dynamic Response of Existing R.C. Bridges Against Earthquake Forces

Experimental and finite element study of one span concrete bridge bent designed by the requirements of the 1970s, under gravity and lateral load

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