Comparative Analysis and Evaluation of Two Prestressed Girder Bridges

Aghagholizadeh, Mehrdad; Çatbaş, F. Necati

doi:10.33552/ctcse.2019.03.000572

Cited by 5 publications

(5 citation statements)

References 6 publications

(5 reference statements)

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“…Prefabricated bridge units, box beams, AASHTO voided slab, AASHTO box beam northeast extreme tee (NEXT) are structurally inadequate for spanning more than 126 ft. Steel wide flange shapes are limited to 90 ft ( 16 ). Prestressed members can tolerate greater loads as a result of increased internal compression and provide reduced deflection ( 17 ). However, the concrete tends to have a higher self-weight compared with steel beams.…”

Section: Methodsmentioning

confidence: 99%

Value-Engineering Methodology for the Selection of an Optimal Bridge System

Mousa

Hussein

Kineber

2021

Transportation Research Record

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Maintaining and enhancing the functionality of the infrastructure at an affordable cost are major challenges for decision makers, particularly given the need to cope with growing societal and transportation demands. This study introduces a systematic multi-criteria value engineering (VE) approach for the selection of a sustainable bridge system. A thorough VE analysis for a proposed long-span bridge in New Jersey, USA was carried out as a pilot study. The function analysis system technique was used to develop logical relationships between the project’s functions. A detailed 100-year life-cycle cost analysis (LCCA) was conducted. The study developed and evaluated eight alternative designs for deck and superstructure systems against set VE criteria comprising constructability, maintenance strategies, and environmental impact. A relative value index was used as an unbiased measure for the selection of the optimal structural system. With total savings of approximately 21% of the original design ($132.5 million), steel plate girders with a high-performance lightweight steel grid deck system have proven to “outvalue” the other alternatives, including the preferred preliminary alternative (PPA). Design engineers and decision makers can use this methodology as a systematic and convenient guide for the selection of economical and sustainable bridge systems. As such, it is necessary to re-evaluate the current practices and policies used for this purpose.

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Section: Methodsmentioning

confidence: 99%

Value-Engineering Methodology for the Selection of an Optimal Bridge System

Mousa

Hussein

Kineber

2021

Transportation Research Record

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“…In order to be conservative when imposing the legal load, it was assumed that the trucks were placed on each lane, bumper to bumper, without any spacing between them, similar to what happens during proof load testing. e way LL is imposed on FEM, illustrated in equation (10), is to artificially replicate proof LT in a numerical setup. For any bridge type, (N u ) numbers of UULSs exist.…”

Section: Stage (3): Ultimate Unfavored Loading Scenarios Andmentioning

confidence: 99%

“…is allows the critical weights to be identified with respect to the bridge geometrics constraints. Equation (10) 4): Quantify BLCE. Equation (1) requires that bridge capacity be deducted by the associated resistance factors indicated in equation (2).…”

Section: Stage (3): Ultimate Unfavored Loading Scenarios Andmentioning

confidence: 99%

“…e third conventional approach to LR is an advanced, reliable, and nondestructive testing (NDT) method that uses a validated bridge FEM constructed through structural model updating techniques. e common FEM-based LR can computationally facilitate the rating process in which it transforms the bridge superstructure to several equivalent 1D composite beams in the background, similar to the conventional AASHTO LRFR method [9][10][11][12]. FEM-based LR is much more demanding than the common AASHTO method since it properly simulates 3D loading distribution inside composite members of reinforced concrete slabs as well as steel girders, consequently impacting the bridge loading capacity evaluation (BLCE) process [13].…”

Section: Introductionmentioning

confidence: 99%

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Finite Element Model-Based Weight-Over Process Philosophy for Bridge Loading Capacity Evaluation and Rating Factor Estimation

Karimpour

Rahmatalla

Ghadikolaee

2021

Advances in Civil Engineering

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Existing rating methods estimate bridge loading capacity and demand from secondary actions due to live loads in the primary structural components. In these methods, uniaxial yielding stress is traditionally used to detect component capacity using either stress quantities or shear-moment actions to compute the capacity demand of the bridge. These approximations can lead to uncertainties in load capacity estimation. This article presents the weight-over process (WOP), a novel computer-aided approach to bridge loading capacity evaluation based on tonnage and rating factor estimation. WOP is expected to capture different forms of failure in a more general manner than existing methods. In WOP, a bridge finite element model (FEM) is discretized into many sections and element sets, each containing a single material type, and each assigned a suitable 3D failure criterion. Then, factored gross vehicle weights (GVWs) are incrementally imposed on the bridge FEM with those predefined ultimate unfavored loading scenarios in a manner similar to proof load testing. WOP code runs nonlinear analysis at each increment until a stopping criterion is met. Two representative bridges were selected to confirm WOP’s feasibility and efficacy. The results showed that WOP-predicted values at the interior girders were between those of the conventional AASHTO and the nondestructive testing (NDT) strain measurement methods. That may put WOP in a favorable zone as a new method that is less conservative than AASHTO but more conservative than real NDT testing.

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“…While girder bridges are not ideal for long spans, they are commonly used for short and medium span bridges. Girders can be constructed using concrete or steel, with concrete girders being either reinforced or prestressed (Aghagholizadeh 2019).…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Pre-Stressed Concrete Girder Bridge Using Csibridge Software

Das,

Rahman

2024

Preprint

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Bridges are crucial transportation components that must be able to withstand seismic events to ensure public safety. Prestressed concrete bridges are commonly used, but their behavior under seismic loading conditions needs to be thoroughly studied. The research intends to investigate how bridges respond to seismic activity by utilizing the powerful FEM tool known as CSiBridge software, and aims to improve design methods and guidelines, enhance performance, and identify potential vulnerabilities and failure modes during earthquakes. As a result, a detailed design of a prestressed concrete bridge model was developed and examined throughout this study. The bridge under study has three 90 feet spans with a total width of 35 feet with four AASHTO-PCI BT-63 bulb-tee Precast Beams on thick cast-in-place. concrete deck Abutments are positioned at each end of the bridge. Verification of bridge superstructure components using the AASHTO LRFD code reference and the bridge modeling process using verified components through CSiBridge software was completed. Detail seismic design, including modal, pushover, and response spectrum analyses, was prepared for conduction on the model. Analyzing the entire model, including construction, materials, properties, and location-specific seismic conditions, constitutes the final step.

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Comparative Analysis and Evaluation of Two Prestressed Girder Bridges

Cited by 5 publications

References 6 publications

Value-Engineering Methodology for the Selection of an Optimal Bridge System

Value-Engineering Methodology for the Selection of an Optimal Bridge System

Finite Element Model-Based Weight-Over Process Philosophy for Bridge Loading Capacity Evaluation and Rating Factor Estimation

Dynamic Analysis of Pre-Stressed Concrete Girder Bridge Using Csibridge Software

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