Bridge weigh‐in‐motion – latest developments and applications world wide

O’Brien, Eugene J.; Žnidarič, Aleš; Ojio, Tatsuya

doi:10.1002/9781118623305.ch2

Cited by 29 publications

(30 citation statements)

References 8 publications

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“…According to [2], these changes in the traffic need to be regularly taken into account by means of code calibration. B-WIM systems, which allow the effective estimation of traffic over the bridge, have had a great development in recent years [3], both in terms of safety assessment of existing structures and on the determination of design loads. The B-WIM concept was introduced by Moses [4] in the late 70s.…”

Section: Introductionmentioning

confidence: 99%

B-WIM systems application on reinforced concrete bridge structural assessment and highway traffic characterization

Junges

Pinto

Miguel

2017

Rev. IBRACON Estrut. Mater.

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ResumoThe vehicles that travel on Brazilian highways have changed a lot in the last decades, with an increase in the traffic load and in the amount of trucks. This fact is not exclusive to our country, so much that in order to assess the structural safety of bridges, there was a great development in bridge weigh-in-motion systems (B-WIM) the last decade, especially in developed countries. Moses, in 1979, was the first one to introduce the B-WIM concept. This work presents the results of a B-WIM system applied on a bridge over the Lambari river, located at BR 153 in Uruaçu (Goiás). The weigh-in-motion technique used is based on Moses' Algorithm and uses influence lines obtained direct from traffic. Traffic characterization of that particular highway, as well as the effects introduced in the bridge structure and the experimental dynamic amplification factor are also discussed. At the end it is concluded that the system used is capable of detecting, with good precision, the axle spacing and the gross vehicle weight shows errors inferior to 3% when compared with the gross weight acquired with static scale.Keywords: B-WIM, monitoring, traffic characteristics, bridges, safety.Os veículos que trafegam nas rodovias brasileiras mudaram muito nas últimas décadas, ocorrendo um aumento na capacidade de carga e na quantidade de caminhões. Esse fato não é exclusivo do nosso país, tanto que na última década houve um grande desenvolvimento dos sistemas de pesagem em movimento em pontes (bridge weigh-in-motion, B-WIM), especialmente nos países desenvolvidos, para avaliação da segurança estrutural de pontes. Moses em 1979 foi o primeiro a introduzir o conceito de B-WIM e o algoritmo por ele desenvolvido continua sendo o mais popular nos sistemas comerciais. No presente estudo são mostrados os resultados da utilização de um sistema B-WIM no monitoramento de uma ponte sobre o rio Lambari, na BR 153, no município de Uruaçu (Goiás). A técnica de pesagem em movimento empregada é baseada no algoritmo de Moses e utiliza linhas de influência obtidas diretamente do tráfego. A caracterização do tráfego atuante nessa rodovia, bem como os esforços introduzidos na estrutura da ponte e um coeficiente de impacto obtido de forma experimental são também discutidos. Ao final conclui-se que o sistema empregado é capaz de detectar com boa precisão o espaçamento entre os eixos e o peso bruto total dos veículos apresenta erros inferiores a 3% quando comparados com os pesos obtidos em balança estática.Palavras-chave: B-WIM, monitoramento, característica do tráfego, pontes, segurança.

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Section: Introductionmentioning

confidence: 99%

B-WIM systems application on reinforced concrete bridge structural assessment and highway traffic characterization

Junges

Pinto

Miguel

2017

Rev. IBRACON Estrut. Mater.

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“…to protect the infrastructure, ensure safety and a fair competition between network users (Han et al 2012)). B-WIM has also been used as a form of soft load testing, where experimental influence lines (OBrien et al 2008) and dynamic measurements (Žnidarič et al 2008) have been obtained. However, to the authors' knowledge direct WIM outputs have not been specifically used for damage identification yet.…”

Section: Introductionmentioning

confidence: 99%

Bridge Damage Detection Using Weigh-in-Motion Technology

Cantero

González

2015

J. Bridge Eng.

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“…This kind of techniques has been successfully employed in similar applications, providing accurate and robust results. More particularly, O'Brien et al used the least square optimization in different bridge weighing in motion applications: in [17] O'Brien et al applied these techniques to identify the moving loads acting on the bridge starting from the measured bridge responses, while in [18]- [20] this method is exploited to improve the performance of a bridge weighing in motion system in estimating the axle loads.…”

Section: Introductionmentioning

confidence: 99%

A New Strategy for Dynamic Weighing in Motion of Railway Vehicles

Allotta

D'Adamio

Marini

et al. 2015

IEEE Trans. Intell. Transport. Syst.

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Weighing-in-motion (WIM) systems automatically perform the dynamic weighing of railway vehicles while the trains are running on the lines through a reasonable number of measurement points placed along the track. Such intelligent systems may overcome disadvantages in terms of costs and traffic management, which are typical of conventional static weighing systems. In this paper, we present an innovative algorithm for dynamical WIM applications aimed at estimating the axle and wheel loads of a generic train composition by means of indirect track measurements. The new approach allows the axle loads estimation at high vehicle speeds and can be customized for several input track measurements (rail shear, rail bending, vertical forces on the sleepers, etc.) as well as a combination of them. Consequently, it can be employed in different kinds of measurement stations. Having once studied the accuracy of the algorithm in estimating the loads, the same novel procedure is used to estimate the center-of-gravity position of the railway vehicle to avoid dangerous imbalances. The algorithm can receive as inputs both experimental and simulated data; simulated data are fundamental to test the algorithm (in terms of accuracy and robustness) under any operating conditions when experimental data are not available. A wide simulation campaign has been carried out to test the algorithm performances, obtaining promising results. In the near future, the proposed approach will be validated through suitable data coming from experimental tests organized in collaboration with Ansaldo STS and ECM SpA, which are the industrial partners of this research project.Index Terms-Weigh-in-motion systems, multibody modeling of railway vehicles, flexible multibody modeling of railway tracks. 1524-9050

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Bridge weigh‐in‐motion – latest developments and applications world wide

Cited by 29 publications

References 8 publications

B-WIM systems application on reinforced concrete bridge structural assessment and highway traffic characterization

B-WIM systems application on reinforced concrete bridge structural assessment and highway traffic characterization

Bridge Damage Detection Using Weigh-in-Motion Technology

A New Strategy for Dynamic Weighing in Motion of Railway Vehicles

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