Bridge Load Testing for Identifying Live Load Distribution, Load Rating, Serviceability and Dynamic Response

Dong, Chuan‐Zhi; Baş, Selçuk; Debees, Marwan; Alver, Ninel; Çatbaş, F. Necati

doi:10.3389/fbuil.2020.00046

Cited by 22 publications

(14 citation statements)

References 14 publications

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“…These issues can result in early intervention, load permit post, costly replacement, and early demolition. It would waste resources and harm the development of sustainable societies [4,5]. A similar situation exists in other countries all over the world.…”

Section: Introductionmentioning

confidence: 89%

Experimental Study of the Fatigue Performance of the Bonding Surfaces and Load-Bearing Capacity of a Large-Scale Severely Damaged Hollow Slab Strengthened by CFRP

Dong

Wang

et al. 2021

Sustainability

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In recent years, carbon fiber reinforced polymer (CFRP) has been widely used in bridge repair, retrofitting, rehabilitation and strengthening to improve the bearing capacity. Although many studies have been conducted to explore the strengthening efficiencies of CFRP, the test specimens were small and the results were difficult to apply to full-scale bridges. Investigations into the strengthening effects of CFRP on real life structures rely on field load tests (without damaging the structures), making it difficult to understand actual improvements in load carrying capacity and strengthening effect. Moreover, there have been few experimental studies on the fatigue performances of CFRP-strengthened structures, especially on the large-scale structures with real wheel moving loads. In this study, the feasibility and efficiency of CFRP strengthening and repair was investigated on a large-scale, prestressed concrete hollow slab decommissioned from a real-life concrete bridge. The hollow slab was first put through a destructive test to test the ultimate load-bearing capacity. Then, CFRP strips were installed on the surface of the severely damaged slab to repair and strengthen it. Fatigue load test—including the moving load test and single point sinusoidal load—and load-bearing capacity tests were conducted on the CFRP-strengthened hollow slab after the destructive test to evaluate the strengthening performance. This study could help us to understand the actual load-bearing capacities of severe damaged concrete structures strengthened by CFRP, reduce waste, save resources and improve the utilization of our infrastructures.

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Section: Introductionmentioning

confidence: 89%

Experimental Study of the Fatigue Performance of the Bonding Surfaces and Load-Bearing Capacity of a Large-Scale Severely Damaged Hollow Slab Strengthened by CFRP

Dong

Wang

et al. 2021

Sustainability

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“…The displacement data source can be directly applied to update the initial FEM or further processed to extract modal information such as modal frequency and mode shape to update the FEM indirectly. Dong et al 201 applied the displacement data to update the FEM of a highway bridge and based on the updated FEM, they conducted bridge load rating. Feng and Feng 192 first obtained the modal parameters from a CV-based displacement measurement and then used these modal parameters to update the FEM.…”

Section: Shmmentioning

confidence: 99%

“…Structural behavior analysis Tian and Pan 128 : deflection profile of railway bridge Guo and Zhu 183 : sound barriers of a viaduct Deng et al 184 : deflection profile of suspension bridge model Ji et al 185 : flexural, shear, and sliding deformation behaviors of RC wall Load distribution estimation Dong 125 : distribution factor of a pre-stressed concreted girder bridge Load carrying capacity analysis Lee et al 187 : load capacity analysis of a steel girder bridge Dong 125 : load rating of a pre-stressed concreted girder bridge Dynamic analysis Xu et al 16 : cable-stayed footbridge Zhao et al 188 : tower of a scaled model of a cable-stayed bridge under earthquake loads Dong et al 149 : grandstand, stadium Ngeljaratan and Moustafa 189 : ABC bridge Modal identification Ji and Chang: stayed cable Chen et al 156,181 : cantilever beam Yang et al 194,195 : aluminum frame structure Fioriti et al 196 : ancient constructions such as buildings and bridges Tian et al 167 : beam Dong et al 149 : grandstand Hoskere et al 163 : suspension bridge (foot bridge) Harmanci et al 200 : steel frame Model updating Dong et al 201 : a pre-stressed concreted girder bridge Feng and Feng 192 : aluminum frame structure Damage detection…”

Section: Application Type Examplesmentioning

confidence: 99%

A review of computer vision–based structural health monitoring at local and global levels

Dong

Çatbaş

2020

Structural Health Monitoring

424

165

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Structural health monitoring at local and global levels using computer vision technologies has gained much attention in the structural health monitoring community in research and practice. Due to the computer vision technology application advantages such as non-contact, long distance, rapid, low cost and labor, and low interference to the daily operation of structures, it is promising to consider computer vision–structural health monitoring as a complement to the conventional structural health monitoring. This article presents a general overview of the concepts, approaches, and real-life practice of computer vision–structural health monitoring along with some relevant literature that is rapidly accumulating. The computer vision–structural health monitoring covered in this article at local level includes applications such as crack, spalling, delamination, rust, and loose bolt detection. At the global level, applications include displacement measurement, structural behavior analysis, vibration serviceability, modal identification, model updating, damage detection, cable force monitoring, load factor estimation, and structural identification using input–output information. The current research studies and applications of computer vision–structural health monitoring mainly focus on the implementation and integration of two-dimensional computer vision techniques to solve structural health monitoring problems and the projective geometry methods implemented are utilized to convert the three-dimensional problems into two-dimensional problems. This review mainly puts emphasis on two-dimensional computer vision–structural health monitoring applications. Subsequently, a brief review of representative developments of three-dimensional computer vision in the area of civil engineering is presented along with the challenges and opportunities of two-dimensional and three-dimensional computer vision–structural health monitoring. Finally, the article presents a forward look to the future of computer vision–structural health monitoring.

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“…3 . The span studied in this study is Span#1 on East Bound, though the spans of the bridge are structurally near identical based on their geometric and material properties as well as positions (Luleci et al 2022 ; Dong et al 2020 ). Thus, any other span could also be used in this study.…”

Section: Case Study Bridgementioning

confidence: 99%

Effect of structural repairs on the load rating and reliability of a prestressed concrete bridge

Debees

Luleci

Çatbaş

2023

ABEN

Self Cite

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Prestressed girders often deteriorate over time due to environmental and man-made stressors, lowering the strength and serviceability of bridge structures. Although structural repairs are implemented to improve the load carrying capacity of the structure, the presence of numerous unknowns leads to high uncertainty in estimating the adequacy of repairs. For instance, the cross-section of the remaining strands, material properties, applied external loads, and workmanship assumptions made throughout the repair process introduce ambiguities when estimating the adequacy of the repairs. This study evaluates the efficiency of re-tensioning repairs of prestressed concrete bridge span girders. The repairs include field splicing, re-tensioning, of deteriorated or damaged strands by torquing a splicing coupler. The evaluation in this study considers component, system reliability, and load ratings while accounting for several uncertainties, such as structural repair, material properties, and external loads. This paper introduces an approach to account for prestressing strands damage and repair uncertainties while also accounting for other uncertainties. In this regard, five cases are studied: as-built, repaired, and three varying degrees of damage cases. First, the distribution for structural demand and capacity accounting for uncertainty in loads, material properties, and repair process is defined for each girder in the prestressed concrete bridge span. In doing so, Monte-Carlo simulation is employed to determine the distributions. Accordingly, the limit state function of the girders is defined from the obtained distributions. Then, the component reliability of each AASHTO (American Association of State Highway and Transportation Officials) Type II girder is calculated from the obtained reliability indices based on the determined limit state functions. Finally, a system reliability model of the span is developed from the component reliability of each girder. Some advantages and disadvantages of using component and system reliability index versus load rating in damaged and repaired prestressed concrete bridge girders are also discussed. Several critical conclusions are made regarding the uncertainties in structural repair, material properties and external loads, and their impact on the load rating and the component and system reliability of the prestressed concrete bridge structure girders.

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Bridge Load Testing for Identifying Live Load Distribution, Load Rating, Serviceability and Dynamic Response

Cited by 22 publications

References 14 publications

Experimental Study of the Fatigue Performance of the Bonding Surfaces and Load-Bearing Capacity of a Large-Scale Severely Damaged Hollow Slab Strengthened by CFRP

Experimental Study of the Fatigue Performance of the Bonding Surfaces and Load-Bearing Capacity of a Large-Scale Severely Damaged Hollow Slab Strengthened by CFRP

A review of computer vision–based structural health monitoring at local and global levels

Effect of structural repairs on the load rating and reliability of a prestressed concrete bridge

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