Probabilistischer Ansatz zur Beurteilung der Dauerhaftigkeit von bestehenden Stahlbetonbauten

Die große Zahl von korrosionsinduzierten Schäden an Infrastrukturbauwerken und der damit verbundene hohe Kostenaufwand für Instandhaltungsmaßnahmen macht eine Beurteilung der Zuverlässigkeit (Gebrauchstauglichkeit, Tragfähigkeit) solcher Bauwerke für die verbleibende Nutzungszeit immer bedeutender. Am Beispiel einer Tiefgarage wird gezeigt, wie durch Verknüpfung von Bauwerksuntersuchung und vollprobabilistischer Lebensdauerbetrachtung (Zuverlässigkeitsberechnung) eine gezielte und ortsgenaue Beschreibung des Bauwerkszustandes grenzzustandsbezogen erfolgen kann. Durch Kombination beider Elemente (Bauwerksuntersuchung/Zuverlässigkeitsberechnung) können Instandsetzungszeitpunkt und Instandsetzungsumfang entsprechend den örtlichen Bedingungen abgeleitet und eine kosteneffiziente und minimalinvasive Instandsetzungsstrategie erarbeitet werden.Improving the Prediction of Condition State by Combining Different MethodsCorrosion of reinforcement is the primary cause for the structural deterioration of reinforced concrete structures exposed to corrosive/ chloride environments. Corrosion results in high costs for infrastructure maintenance. Thus assessment of existing structures in terms of required structural performance (serviceability and safety performance level) is of increasing importance. Using a car park as an example, it is explained how the time dependent and area related/spatial development of the condition state of the structure are described by means of combining a full‐probabilistic deterioration model with results from condition control. This enables a cost‐optimal maintenance strategy, based on the dependence of the deterioration process on time and location.

show abstract

“…hier auch Tabelle 1. [8]. Arbeiten von [9] konnte entnommen werden, dass sich die Betondeckung ab einer Elementgröße von rd.…”

Section: Modellkenngrößenunclassified

Optimierte Zustandsprognose durch kombinierte Verfahren

Gehlen¹,

Greve‐Dierfeld²

2010

Beton und Stahlbetonbau

View full text Add to dashboard Cite

show abstract

“…3. Details of the used model are given in Faber and Gehlen [16], Gehlen [17] and in DuraCrete -Brite EuRam III [14].…”

Section: Modeling Of the System Vulnerabilitymentioning

confidence: 99%

Robustness of Externally and Internally Post-Tensioned Bridges

Radowitz

Schubert

Faber

2008

BUST

View full text Add to dashboard Cite

The quantitative assessment of the robustness of structures has been widely discussed in the recent decades. This paper starts out with an outline of a recently developed risk based methodology for the quantification of the robustness of structures which explicitly accounts for different damage states, the characteristics of the structure in regard to redundancy and for all consequences, direct and indirect. The framework is then applied to assess the robustness of an externally and internally post-tensioned highway bridge designed according to present best practice. The significance of different damage states on the robustness is investigated and the potential of the framework is highlighted through parameter studies. Finally different measures to increase the structural robustness are discussed.

show abstract

“…Later developments have aimed to also model the aspects of the spatial variability of the degradation of concrete structures as discussed in Stewart et al (2003). In Hergenröder (1992), Sterrit et al (2001), Faber and Rostam (2001), Faber and Sorensen (2002), Maes (2003), Faber and Gehlen (2002), Lentz et al (2002), and Malioka and Faber (2004) the spatial characteristics of the initial phases of degradation of concrete structures, such as chloride ingress and carbonation is modeled by means of a subdivision of the structures into elements of a size governed by the spatial variability of the most important factors for the degradation. In the recent works by Vu and Stewart (2002) the spatial variability associated with the propagation phases is investigated.…”

Section: Introductionmentioning

confidence: 99%

A Computational Framework for Risk Assessment of RC Structures Using Indicators

Faber

Straub

Maes

2006

Comp-aided Civil Eng

View full text Add to dashboard Cite

The present article starts out by proposing a framework for risk assessment of RC structures utilizing condition indicators. Thereafter, the various building stones of the suggested framework are described. This description includes a summary of the basis for the probabilistic modeling of the initiation phases of chlorideinduced corrosion of concrete structures. Furthermore, a probabilistic modeling of condition indicators regarding the condition state of concrete structures is proposed whereby information available at the design stage of concrete structures as well as information obtained through in-service inspections may be utilized for the purpose of reliability updating. Finally, it is described how the probability of localized and spatially distributed degradation of different degrees can be assessed and examples are given on how the various indicators may be used for the purpose of updating the statistical characteristics of the future degradation of RC structures. The presented framework forms a consistent basis for risk assessment of concrete structures subject to chloride-induced corrosion. It can easily be adopted to other degradation phenomena such as carbonation-induced corrosion and it forms a good basis for the development of efficient approaches to Asset Integrity Management of RC structures.

show abstract

Probabilistischer Ansatz zur Beurteilung der Dauerhaftigkeit von bestehenden Stahlbetonbauten

Cited by 7 publications

References 0 publications

Optimierte Zustandsprognose durch kombinierte Verfahren

Optimierte Zustandsprognose durch kombinierte Verfahren

Robustness of Externally and Internally Post-Tensioned Bridges

A Computational Framework for Risk Assessment of RC Structures Using Indicators

Contact Info

Product

Resources

About