Experimental Load Rating of a Posted Bridge

Chajes, Michael J.; Mertz, Dennis R.; Commander, Brett C.

doi:10.1061/(asce)1084-0702(1997)2:1(1)

Cited by 67 publications

(37 citation statements)

References 3 publications

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“…Nowak and Tharmabala (1998) used test data to improve the accuracy of load and resistance models. Studies on bridge evaluation with non-destructive field test methods were carried out by Chajes et al (1997), Scott et al (2003), and Rens et al (2005).…”

Section: Introductionmentioning

confidence: 99%

“…Law et al (1995) derived the best estimation of the moment of inertia of a girder by fitting the first frequency of the finite element model and the test results. Chajes et al (1997) used diagnostic testing results to determine the composite section properties of the girders and support restraints, and then to develop a numerical model of the bridge to estimate the maximum allowable load. Jauregui and Barr (2004) developed an equivalent frame model to calculate the load distribution factor for bridge load rating by comparing the moment distribution in the longitudinal direction obtained from different finite element models with the field test data.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Bridge Load Carrying Capacity Using Updated Finite Element Model and Nonlinear Analysis

Ding

Hao

Xia

et al. 2012

Advances in Structural Engineering

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The integrity of ageing bridges is in doubt because of increasing traffic loads, deterioration of materials, possible damage during service, and revised code requirements. Traditional methods in prediction of load varying capacity of bridges are usually based on the design blueprints and may not reflect the bridge condition as is. In this paper, the nonlinear finite element analysis, incorporating the model updating technique, is used to predict the behaviour of a 30-year-old slab-girder bridge. The original finite element model based on the design drawings is updated by modifying the stiffness parameters of the girders, slab, shear connectors and bearings so that the vibration properties of the model match the field vibration measurement data. The updated model represents the present condition of the bridge better than the original model that is based on the design blueprints. The load carrying capacity of the bridge is then calculated using the original and updated finite element models, respectively, with consideration of nonlinear material properties. The comparison shows that the bridge load carrying capacity under the present condition is lower than that under the design condition, whereas is still above the design requirement. The influence of the shear connectors on the load carrying capacity is specially investigated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Bridge Load Carrying Capacity Using Updated Finite Element Model and Nonlinear Analysis

Ding

Hao

Xia

et al. 2012

Advances in Structural Engineering

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“…This research builds on prior work on the field testing, experimental testing, analysis, and design of curved I-girder bridge systems, as well as diagnostic testing of straight I-girder bridges (e.g. [3][4][5]). Well-documented diagnostic field tests of curved steel girder bridges include Beal [6] on four curved steel bridges: two singlespan I-girder bridges, one two-span continuous I-girder bridge, and one two-span continuous box girder bridge were tested.…”

Section: Introductionmentioning

confidence: 99%

Measured behavior of a curved composite I-girder bridge

Hajjar

Krzmarzick

Rubio

2010

Journal of Constructional Steel Research

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“…Bridge load capacity is usually controlled by flexural stresses, and these can be calculated from measured strains. Strains can easily be measured in steel bridges by attaching electrical resistance strain gages to the steel girders [7,8]. Electrical resistance strain gages can also be used to measure strains in prestressed girder bridges [9] because the prestressing prevents the concrete from cracking.…”

Section: Introductionmentioning

confidence: 99%

A Transducer for Measuring Tensile Strains in Concrete Bridge Girders

Skelton

Richardson

2006

Exp Mech

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Load testing highway bridges is becoming an increasingly common procedure for determining bridge load capacity. Bridge testers frequently measure the strains in critical bridge components due to known loads. Measuring the strains in reinforced concrete bridges can be difficult due to the nonuniform distribution of strain in the tension (cracked) zone. This paper describes the design and testing of a simple yet accurate transducer for measuring flexural tensile strains in reinforced concrete bridges.

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Experimental Load Rating of a Posted Bridge

Cited by 67 publications

References 3 publications

Evaluation of Bridge Load Carrying Capacity Using Updated Finite Element Model and Nonlinear Analysis

Evaluation of Bridge Load Carrying Capacity Using Updated Finite Element Model and Nonlinear Analysis

Measured behavior of a curved composite I-girder bridge

A Transducer for Measuring Tensile Strains in Concrete Bridge Girders

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