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Serviceability Assessment of systems in the SBRA method
Fischer, Ondřej ; Marek, Pavel
The method of Simulation Based Reliability Assessment (SBRA) has been proved well especially for relatively simple structures, but the recent development of its software has made possible to use this method also for more complicated structures like moment resisting frames. Nevertheless, the feasibility of exacted analyses of large systems emphasizes a more sophisticated engineering approach, in order to choose the input values and their probabilistic parameters in a reasonable way. In general, the parameters of safety can be more or less easily found in the Codes or other sources, but at least some of the criteria of serviceability must often be found out by the designer himself. Some examples are given in the paper.
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Load efects and their combinations
Václavek, L. ; Marek, Pavel
The load effects combination analysis is one of the very important components in thestructural reliability evaluation. The current approaches are briefly indicated. The analysis of load effects combination based on a fully computing methods (see, e.g., SBRA method) is described and its two main concepts are indicated, „arbitrary point in time“approach and „extreme load effect“approach. Future studies are outlined.
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Steel stuctures
Václavek, L. ; Marek, Pavel
The subject of the paper is a brief discussion on the transition of the reliability assessment of steel structures from the methods applied in the past and in current codes probabilistic methods corresponding to the extensive development of computers reliability theory. Assessment of a simple planar steel frame containing leaning columns serves for demonstration. The potential of probabilistic methods is emphasized.
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Durability of steel structures exposed to corrosion
Pustka, D. ; Marek, Pavel
In the area of structural design increasing attention has being given to the development and application of new progressive methods allowing for complex reliability assessment of structures with consideration time-dependent effects. One of these powerful methods allowing this complex reliability analysis is SBRA method. The potential of this method is briefly outlined on example of a steel component exposed to time-dependent corrosion effects.
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Probabilistic reliability assesment of steel planar frames
Křivý, V. ; Marek, Pavel
In connection with the transition to a probabilistic reliability assessment of systems, it is necessary to evaluate the suitability of particular transformation models serving as tools for transforming the loading into the response of the structure to the load with regard to the substance of the stochastic method. In this connection attention is paid to the transition from the traditional assessment of buckling strength standards to the “strength stability concept” with respect to the effects corresponding to the second order theory.
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Loading
Konečný, P. ; Marek, Pavel
The subject of the paper is a comment on the representation of loads in the structural reliability assessment method considering the transition from the current methods (such as the Partial factors method applied in Eurocodes and in AISC-ASCE code) to fully probabilistic reliability assessment methods (such as Simulation-Based Reliability Assessment Metod, SBRA, Probabilistic model code and others).
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Windload in probabilistic reliability assessment method
Hanzlík, P. ; Marek, Pavel
The development of new approaches to structural reliability assessment leads to introduction of probabilistic methods. Application of these methods requires a new representation of loads and all other input quantities by non-parametric distributions as well as a non-traditional approach to the evaluation of reliability expressed by comparison of probability of failure and the target probability. The aim of this paper is to indicate a probabilistic approach to the reliability assessment of a structure exposed to combination of wind load (expressed by two-component wind rosette) and several other loads (expressed by single-component load duration curves).
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