British Highway Bridge Loading.

Henderson, W

doi:10.1680/ipeds.1954.11638

Cited by 7 publications

(4 citation statements)

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“…These limit states were analysed for combinations of dead and traffic loading; the traffic load models considered were normal (HA) and abnormal (HB), in accordance with BD 21 Highways Agency, 2001), the assessment loading code. Normal (HA) loading is said to represent the worst-case occurrence of typical traffic loading over the lifetime of the bridge, and is specified by a standard loading curve derived from the bunching of trucks in a notional 5 lane (Henderson, 1954). This is most onerous for shorter spans as this bunching can more reasonably be expected to occur, and is less onerous for longer spans where such an occurrence is less likely.…”

Section: Description Of Network and Assessment Methodologymentioning

confidence: 99%

Reliability analysis of a bridge network in Ireland

Hanley

Pakrashi

2016

Proceedings of the Institution of Civil Engineers - Bridge Engi

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This paper presents the reliability analysis of a network of six bridges in Ireland, with a focus on the sensitivity analysis and the analysis of parameter importance measures. The basis of the analysis stems from the possibility of investigating similarities in various parameters, leading to the establishment of network-level indicators based on fully probabilistic assessments. Initially, deterministic assessments are carried out on these bridges to verify the limit-states, and a detailed probabilistic analysis is conducted, taking uncertainty in relation to the available information into account. Parametric importance measures are established across the network, and patterns identified from these studies suggest the potential for reliability-based network calibrations of bridge structures. This paper is expected to encourage a greater sharing of network-level information of the owners and managers of bridges.

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Section: Description Of Network and Assessment Methodologymentioning

confidence: 99%

Reliability analysis of a bridge network in Ireland

Hanley

Pakrashi

2016

Proceedings of the Institution of Civil Engineers - Bridge Engi

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“…Unfortunately, there is a long-standing shortage of congested traffic data, mainly due to current limitations of detection techniques. This is reflected in the fact that most existing long-span bridge traffic load models are based on conservative assumptions, such as a queue of vehicles at minimum bumper-to-bumper distances [5][6][7][8][9][10][11], thus neglecting driver behaviour. However, trafficrelated technologies are developing rapidly, thus enabling a better understanding of driver behaviour and overall traffic features, particularly during congestion.…”

Section: Research On Highway Bridge Traffic Loadingmentioning

confidence: 99%

“…While pioneering studies focussed on wors-case scenarios [5,6], a probabilistic approach to bridge loading is now common [7-11, 27, 33, 38, 60, 62-66]. The probability F that a load level z is not exceeded (probability of non-exceedance) is commonly expressed in terms of return period, T(z) [67].…”

Section: Statistics Conceptsmentioning

confidence: 99%

Highway Bridge Traffic Loading

Lipari¹

2016

Structural Bridge Engineering

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In this chapter, traditional approaches and recent advances in highway bridge traffic loading are described, which are of great significance for structural safety assessment of bridges. Indeed, it is widely accepted that consideration of site-specific traffic features can enable significant savings in maintenance operations. While short spans are governed by free-flowing traffic plus an allowance for the dynamic effects, long spans are governed by congested conditions. For the former, a promising research trend is the investigation of the dynamic vehicle-bridge interaction, which is shown to lead to dynamic effects much lower than previously thought. For the latter, advances in traffic flow modelling enable the simulation of realistic congestion patterns based on widely available free-flowing traffic data, thus partially overcoming a long-standing shortage of congestion data. Here, emphasis is given to the promising application of traffic microsimulation to long-span bridge loading, combined with a probabilistic approach based on the extreme value theory, to compute site-specific characteristic loading values.

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“…Prior to the latter 19th century, traffic loading on bridges was not of primary concern to the bridge builder, as this load was considered light relative to the self-weight of the structure itself (Henderson 1954). It was only subsequent to the emergence of the traction engine that the effect of traffic loading on bridges became an important design criteria.…”

Section: Evolution Of Normative Traffic Loadingmentioning

confidence: 99%

Effects of increasing design traffic load on performance and life-cycle cost of bridges

Hanley¹,

Frangopol²,

Kelliher³

et al. 2016

Maintenance, Monitoring, Safety, Risk and Resilience of Bridges and Bridge Networks

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Due to the onerous and expensive nature of preventative and essential maintenance of existing bridge infrastructure, it is prudent to look into methods of improving the life-cycle safety and cost of newly constructed bridges at the design phase. In an effort to acheive economy in material quantities and initial cost, the structural capacity of these bridges is often at the required minimum target level. This paper investigates the effects that increased design traffic loading have on the initial construction cost and whether that could be balanced by a reduced requirement for financial intervention in the mid to later stages of the bridge's designlife. This is achieved by conducting a life-cycle performance and cost assessment on a reinforced concrete slab bridge that is designed to increasing standard traffic loads.

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British Highway Bridge Loading.

Cited by 7 publications

References 0 publications

Reliability analysis of a bridge network in Ireland

Reliability analysis of a bridge network in Ireland

Highway Bridge Traffic Loading

Effects of increasing design traffic load on performance and life-cycle cost of bridges

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