Experimental safety evaluation of concrete and masonry bridges

Gutermann, Marc; Slowik, Volker; Steffens, K.

doi:10.1784/insi.45.12.805.52972

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…The first is a special designed mobile in situ loading device (vehicle) for short and medium span road bridges to assess the structural safety (performance) and derive optimal strategies for maintenance using reliability based method. In here, the concept of experimental safety evaluation will be discussed; the loading vehicle for short and medium span road bridge testing as well as essential operating experiences gained in practise will be described [4,5]. The second is a long term health monitoring method using a public bus as part of a public transit system (called bus monitoring system) to be applied mainly to short and medium span bridges, along with safety indices, namely, "characteristic deflection" which is relatively free from the influence of dynamic disturbances due to such factors as the roughness of the road surface, and a structural anomaly parameter [6].…”

Section: Introductionmentioning

confidence: 99%

Frontier of continuous structural health monitoring system for short & medium span bridges and condition assessment

Miyamoto

Kiviluoma

Yabe

2018

Front. Struct. Civ. Eng.

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It is becoming an important social problem to make maintenance and rehabilitation of existing short and medium span(10-20m) bridges because there are a huge amount of short and medium span bridges in service in the world. The kernel of such bridge management is to develop a method of safety(condition) assessment on items which include remaining life and load carrying capacity. Bridge health monitoring using information technology and sensors is capable of providing more accurate knowledge of bridge performance than traditional strategies. The aim of this paper is to introduce a state-of-the-art on not only a rational bridge health monitoring system incorporating with the information and communication technologies for lifetime management of existing short and medium span bridges but also a continuous data collecting system designed for bridge health monitoring of mainly short and medium span bridges. In this paper, although there are some useful monitoring methods for short and medium span bridges based on the qualitative or quantitative information, mainly two advanced structural health monitoring systems are described to review and analyse the potential of utilizing the long term health monitoring in safety assessment and management issues for short and medium span bridge. The first is a special designed mobile in situ loading device(vehicle) for short and medium span road bridges to assess the structural safety(performance) and derive optimal strategies for maintenance using reliability based method. The second is a long term health monitoring method by using the public buses as part of a public transit system (called bus monitoring system) to be applied mainly to short and medium span bridges, along with safety indices, namely, "characteristic deflection" which is relatively free from the influence of dynamic disturbances due to such factors as the roughness of the road surface, and a structural anomaly parameter.

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Section: Introductionmentioning

confidence: 99%

Frontier of continuous structural health monitoring system for short & medium span bridges and condition assessment

Miyamoto

Kiviluoma

Yabe

2018

Front. Struct. Civ. Eng.

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“…Both values reduce the uncertainties and lead to an increased permitted service load. The benefit is estimated conservatively about 30-50% (Gutermann, Slowik et al 2003). Strains are used deliberately instead of stresses, since they are directly measureable and can be compared to analytical results, in case Young's Modulus of Elasticity can be determined reliably.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Historic Masonry by Cutting and Fracture Tests

Gutermann

Schröder

2008

Proc Appl Math and Mech

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The existing stress and strain conditions of historic masonry structures are unknown due to several influences (e.g. damages, settlements, permanent loads). Their actual load carrying safety can only be assessed analytically by a conservative estimation of all imponderables. The result is often insufficient and may lead to a reduction of the allowed live load. By assessing experimentally the existing strain conditions using a slightly destructive method, the allowed live load may be increased. Thus some masonry structures can be prevented from demolition or be admitted to higher live load. The new developed method is based on the well known "Flat-Jack-Procedure" and shall improve the applications as well as the accuracy. It involves attaching measurement devices to the masonry surface, cutting longitudinally and horizontally and measuring the relief of strain. A mobile load device is used to collect information of the inhomogeneous specimen (consisting of brick and mortar). Thus Young's Modulus of Elasticity as well as the ultimate strain ε u are assessed. In this paper the theoretical background and the experimental set-up is described and examples show the achieved results.

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Acoustic Emissionanalysis During Test Loading of Existing Structures

Kapphahn¹,

Slowik²

2008

Acoustic Emission and Critical Phenomena

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Experimental safety evaluation of concrete and masonry bridges

Cited by 5 publications

References 4 publications

Frontier of continuous structural health monitoring system for short & medium span bridges and condition assessment

Frontier of continuous structural health monitoring system for short & medium span bridges and condition assessment

Assessment of Historic Masonry by Cutting and Fracture Tests

Acoustic Emissionanalysis During Test Loading of Existing Structures

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