Seismic Fragility of Continuous Steel Highway Bridges in New York State

Pan, Yuxin; Agrawal, Anil K.; Ghosn, Michel

doi:10.1061/(asce)1084-0702(2007)12:6(689)

Cited by 124 publications

(47 citation statements)

References 8 publications

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“…Thus, uncertainties of these factors need to be considered in the seismic vulnerability analysis herein. According to the structural characteristics of a typical threespan continuous beam bridge on the Sichuan-Tibet railway, and based on Pan [22] and Tavares [23] et al 's findings and construction features in China, uncertainty parameters in the bridge model and their distribution were identified as shown in Table 3.…”

Section: Uncertainties Of Bridge Structure Parametersmentioning

confidence: 99%

“…For piers, after comprehensively considering the characteristics of three-span continuous beam bridge and consulting literature findings [3,6,24], curvature ductility ratio was finalized as the pier damage index. Specific method for damage index calculation is detailed in the literature [22]. The curvature ductility ratio, being less than 1.00, implies elastic state and no damage for the piers, while other larger values mean more serious damage states.…”

Section: Determination Of Bridge Structure Damage Indicesmentioning

confidence: 99%

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Seismic Vulnerability Evaluation of a Three-Span Continuous Beam Railway Bridge

Wei

Dianbin

Jiang

et al. 2017

Mathematical Problems in Engineering

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In order to evaluate the seismic vulnerability of a railway bridge, a nonlinear finite element model of typical three-span continuous beam bridge on the Sichuan-Tibet railway in China was built. It further aimed at performing a probabilistic seismic demand analysis based on the seismic performance of the above-mentioned bridge. Firstly, the uncertainties of bridge parameters were analyzed while a set of finite element model samples were formulated with Latin hypercube sampling method. Secondly, under Wenchuan earthquake ground motions, an incremental dynamic method (IDA) analysis was performed, and the seismic peak responses of bridge components were recorded. Thirdly, the probabilistic seismic demand model for the bridge principal components under the prerequisite of two different kinds of bearing, with and without seismic isolation, was generated. Finally, comparison was drawn to further ascertain the effect of two different kinds of bearings on the fragility components. Based on the reliability theory, results were presented concerning the seismic fragility curves.

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Section: Uncertainties Of Bridge Structure Parametersmentioning

confidence: 99%

Section: Determination Of Bridge Structure Damage Indicesmentioning

confidence: 99%

Seismic Vulnerability Evaluation of a Three-Span Continuous Beam Railway Bridge

Wei

Dianbin

Jiang

et al. 2017

Mathematical Problems in Engineering

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“…Probabilistic analysis of the median and log-standard deviation parameters are then estimated by maximum likelihood procedure and the fragility curves are generated. , (Hwang et al 2001), (Shinozuka et al 2001), (DesRoches et al 2003), (Pan 2007), (Nielson and DesRoches 2007), (Simon et al 2010).…”

Section: Non-linear Time History Analysismentioning

confidence: 99%

Bridge Seismic Retrofit Measures Considering Subduction Zone Earthquakes

Dusicka¹,

Bazaez²,

Knoles³

2015

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Research was conducted to investigate the effect of subduction zone earthquakes on structural damage. The study suggests that large magnitude ground motions of long duration have the potential of significantly increasing the number of inelastic excursions and consequently incur more extensive structural damage as compared to ground motions with similar elastic spectral demands but of shorter duration. This increase in demand plays a crucial role in the Pacific Northwest where a mega subduction zone earthquake is impending. Typical reinforced concrete bridge bents constructed in the 1950 to mid-1970 in the State of Oregon were designed and built with minimum seismic considerations. This resulted in inadequate detailing within plastic hinge zones, leaving numerous RC bents highly susceptible to damage following an earthquake. In this study, the cyclic performance of an asbuilt RC square column and a reinforced concrete bridge bent retrofitted using buckling restrained braces (BRBs) was experimentally evaluated using quasi-static cyclic loading protocols aiming to reflect subduction zone earthquake demands up to displacement ductility. The buckling restrained braces were designed as replaceable elements in order to take the earthquake-induced energy and dissipate it through nonlinear hysteretic behavior. Two BRB designs were considered in the study in an effort to assess the influence of BRB stiffness on the overall structural performance. The results of these large-scale experiments successfully demonstrated the effectiveness of utilizing buckling restrained braces for achieving high displacement ductility of the retrofitted structure, while also controlling the damage of the existing vulnerable reinforced concrete bent up to the design performance levels. The potential of improving the overall seismic behavior and the design performance levels with BRBs offers structural design professionals a viable method for performance driven retrofit of reinforced concrete bents. 17. Key Words Subduction zone earthquakes, reinforced concrete bridge bents, plastic hinge zone, performance levels, bridge seismic retrofit, quasi-static loading protocol, buckling restrained braces.18. Distribution Statement: Copies available from NTIS, and online at

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“…This will ensure reliable and cost-effective rehabilitation techniques and control solutions to reduce potential damages during such events. Fragility curve analysis, one of the tools for assessing the vulnerability of existing and newly designed highway bridges to seismic and scouring hazards, and hazards due to corrosion and chloride penetration from de-icing salt, is becoming popular nowadays [4,[13][14][15][16][17][18]. Seismic fragility assessment of a new or existing highway bridge describes the probability of having slight, moderate, or severe damage when subjected to a specific ground motion.…”

Section: Introductionmentioning

confidence: 99%

Highway Bridge Infrastructure in the Province of British Columbia (BC), Canada

Siddiquee

Alam

2017

Infrastructures

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Some recent catastrophic impacts on highway bridges around the world have raised concerns for assessing the vulnerability of existing highway bridges in Canada. Rapid aging of bridge infrastructure coupled with increased traffic volume has made it crucial to establish an advanced Bridge Management System (BMS) for highway bridges. This paper aims at developing a highway bridge inventory for the province of British Columbia (BC) which is critical for efficient assessment of the existing structural health condition of the bridges, predicting their future deterioration, and prioritizing their maintenance and retrofitting works. This inventory is an extensive assemblage of data on highway bridges in BC under the responsibility of the BC Ministry of Transportation and Infrastructure (BC MoT) that includes more than 2500 highway bridges. It includes identification of the most common bridge types along with their location, structural and geometric parameters such as construction materials, bridge length, number of spans, deck width, skew angle, bridge pier, and foundation type, structural health condition rating and construction period. This information is of paramount importance for effective infrastructure management, proper rehabilitation solutions, and efficient design of a Structural Health Monitoring (SHM) and Control System for enhancing structural resilience of highway bridges in BC. Several statistical analyses have been carried out for efficient utilization of the information available in the inventory for further research and analyses, as well as for developing a proper BMS for the province's bridges.

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Seismic Fragility of Continuous Steel Highway Bridges in New York State

Cited by 124 publications

References 8 publications

Seismic Vulnerability Evaluation of a Three-Span Continuous Beam Railway Bridge

Seismic Vulnerability Evaluation of a Three-Span Continuous Beam Railway Bridge

Bridge Seismic Retrofit Measures Considering Subduction Zone Earthquakes

Highway Bridge Infrastructure in the Province of British Columbia (BC), Canada

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