Christian Gasser- Dr.
- Research Engineer at Austrian Institute of Technology
Christian Gasser
- Dr.
- Research Engineer at Austrian Institute of Technology
Structural dynamics and life cycle engineering
About
15
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Introduction
Current institution
Publications
Publications (15)
Im Forschungsprojekt COUNT (COncreting UNder Traffic) wurden die Auswirkungen von Verkehrserschütterungen auf jungen Beton umfangreich untersucht. Diese Fragestellung hat in letzter Zeit an Relevanz gewonnen, denn bei Erneuerungs‐ oder Erweiterungsarbeiten an Brücken werden oft Verkehrssperren verhängt, da man fürchtet, dass die vom Verkehr verursa...
In the COUNT (Concreting under traffic) research project, the effects of traffic vibrations on young concrete have been extensively investigated. This research question has recently become more relevant since traffic closures often have to be imposed when bridges are renovated or widened, as there is a concern that the vibrations caused by traffic...
Im Forschungsprojekt COUNT (Concreting under traffic) werden die Auswirkungen von Verkehrserschütterungen auf jungen Beton umfangreich untersucht. Diese Fragestellung hat in letzter Zeit an Relevanz gewonnen. Bei Erneuerungs‐ oder Erweiterungsarbeiten an Brücken müssen oft Verkehrssperren verhängt werden, da man fürchtet, dass die vom Verkehr verur...
In the context of ageing of road infrastructure and increasing hazards due to climate change, it is important to allocate available funds for construction works and maintenance such that functionality loss is minimised in its extent and duration. In other words, the aim is to increase the resilience of infrastructure. In this paper, the outcomes of...
Die Bewertung des Zustandes von Bauwerken und die Verlängerung ihrer Lebensdauer steht am Fachbereich „Baudynamik und Bauwerksbewertung” des Austrian Institute of Technology (AIT) seit langem im Mittelpunkt [1]. Häufig werden dabei auch Schwingungsmessdaten herangezogen, etwa um mechanische Modelle (z.B. FEM) zu aktualisieren [2],[3],[4]. Ein weite...
In an ongoing research project, the effects of vibrations on young (reinforced) concrete are being investigated. Such a situation is often encountered at repair and widening works on bridges at the time when parts of newly cast concrete are connected to the existing bridge under running traffic. In the research project, a systematic approach is pur...
The seismic safety of an arch dam is analysed by calculating fragility curves for different damage and failure mechanisms. The model includes fluid-structure-foundation interaction and considers contact and material type nonlinearities. The ultimate limit state (failure) is
studied by means of a plastic-damage concrete model, especially developed f...
The thesis starts with a presentation of reliability theory. The background of the semiprobabilistic safety concept is explained using a simple example. Based in this, transition takes places to more and more general and complicated systems, whereas the resulting limitations are elaborated. This leads to Monte-Carlo simulation (MCS), which is the m...
Asymptotic sampling is a recently developed method for calculating small failure probabilities of high-dimensional problems. It is based on Monte Carlo simulation, however, extremely small probabilities can be estimated with reasonable computational effort. The present paper presents an optimal strategy for using asymptotic sampling. In particular,...
Asymptotic sampling is a method for calculating small failure probabilities of high-dimensional problems. It is based on Monte Carlo simulation and uses a regression and extrapolation technique to estimate extremely small probabilities with reasonable computational effort. Here, an approach is presented which allows the estimate exceedance probabil...
