Cost–benefit optimization for maintained structures by a renewal model

Joanni, Andreas; Rackwitz, R.

doi:10.1016/j.ress.2006.12.014

Cited by 22 publications

(7 citation statements)

References 17 publications

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“…From a reliability engineering perspective, they are series flood protection systems. By definition, series systems fail if any one of their components fails (Joanni and Rackwitz 2008). In order to determine the failure probabilities of the dyke-ring components, which are here defined as probabilities of breaching, the hydraulic load events that they are subject to and their structural resistances need to be determined.…”

Section: Failure Of Flood Prevention Systemsmentioning

confidence: 99%

Economic optimization of flood prevention systems in the Netherlands

Tsimopoulou

Kok

Vrijling

2015

Mitig Adapt Strateg Glob Change

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After the flood disaster of 1953, the Netherlands adopted a rational approach to flood risk management with the use of protection standards determined by means of costbenefit analysis. Due to scientific and political developments that have recently taken place, an update of the Dutch protection standards is being undertaken. One of the major priorities considered, is the need to address three issues, namely: (1) expressing the protection standards as failure probabilities of the flood defences, i.e. probabilities of breaching, instead of exceedance frequencies of water levels that is currently the case, (2) taking into account a spatial variability of those failure probabilities, and (3) considering various flooding scenarios. These aspects have been comprehensively addressed within a national flood risk analysis project, and partly considered in a numerical cost-benefit analysis approach, developed for the determination of new protection standards in the Netherlands. This paper presents an analytical economic optimization approach that makes an explicit link with all results of the national flood risk analysis project. In particular, an approach is outlined for the approximation of economically optimal design values of the failure probabilities along dyke-ring segments, which are treated as a series system of flood defences. The approach can assist in the determination of new protection standards in the Netherlands, but also in the design of flood prevention systems elsewhere.

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Section: Failure Of Flood Prevention Systemsmentioning

confidence: 99%

Economic optimization of flood prevention systems in the Netherlands

Tsimopoulou

Kok

Vrijling

2015

Mitig Adapt Strateg Glob Change

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“…Assuming r ′ = ln(l + r ), the present value factor would become Eq. , which is the continuous capitalization function . For r << 1, a good approximation could be obtained with r ′ ≈ r .…”

Section: Life Cycle Cost Of Concrete Componentmentioning

confidence: 99%

Life cycle analysis for concrete beams designed with cross‐sections of equal durability

Chen

Zhu

2016

Structural Concrete

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Durability at the corners of the cross‐section is relatively weak in the concrete beams of bridges; the reinforcement at the corners therefore corrodes first. In order to delay durability failure at the corners, measures should be taken such as the application of corner concrete coatings or adjustments to the reinforcement at the corners. In this way, the durability resistance would be adjusted to be equal in the section, which is called the equal durability design method. In this paper, the life cycle analyses of a component designed with equal durability and one designed in the traditional way – both in a carbonation environment – are conducted and compared. A probabilistic model of service life is established based on empirical degradation models. Service life distribution is calculated with the Monte Carlo simulation method. Costs associated with durability failure are estimated based on the service life distribution. Related influencing factors are analysed as well. Finally, life cycle cost analyses of the component designed with equal durability and the one designed in the traditional way are conducted and compared. The results show that the component designed with equal durability is more economic over the life cycle if construction cost is kept within about 1.1 times that of the component designed traditionally.

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“…In the formula p is the vector of all safety relevant parameters, B(p) is the benefit derived from the repairing, C(p) is the cost of the repairing and D(p) is the cost in case of failure; it is assumed that all quantities can be measured in monetary units. A repair intervention is financially optimal if the previous equation is maximised, and a structure rehabilitation makes sense only if R(p) is positive (Rackwitz, 2007; Joanni and Rackwitz, 2008).…”

Section: Introductionmentioning

confidence: 99%

Non‐destructive testing as a tool in reinforced concrete buildings refurbishments

2011

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PurposeThis paper aims to report a case study regarding the combined use of several non‐destructive techniques (NDTs) as a tool in the management of diagnosis and refurbishment of a damaged reinforced concrete building.Design/methodology/approachFour types of NDTs have been selected and carried out on the pillars of the building: visual inspection, electromagnetic rebar location, sonic test and rebound hammer test. The campaign has been planned and run in order to get the highest amount of reliable data about materials degradation and structural safety with limited costs and limited interference with the functionality of the building.FindingsThe diagnostic campaign highlighted the usefulness of the selected techniques in the diagnosis of the type and the amount of degradation, thus permitting a plan of refurbishments to be defined, and to get a realistic estimation of restoration costs.Practical implicationsNDTs' ability to specifically identify a type of damage may be viewed as a reliable tool in assessing and managing the structural life‐cycle cost.Originality/valueThe presented case study highlighted that NDTs are very likely to locate and quantify the damage of materials and buildings, so that they can be considered as one of the most important parts of health monitoring of civil structures and infrastructures.

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Cost–benefit optimization for maintained structures by a renewal model

Cited by 22 publications

References 17 publications

Economic optimization of flood prevention systems in the Netherlands

Economic optimization of flood prevention systems in the Netherlands

Life cycle analysis for concrete beams designed with cross‐sections of equal durability

Non‐destructive testing as a tool in reinforced concrete buildings refurbishments

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