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Featured researches published by Vlastimil Krejsa.


Transactions of the VŠB: Technical University of Ostrava, Civil Engineering Series | 2010

Software Package Probcalc from the Point of View of a User

Petr Janas; Martin Krejsa; Vlastimil Krejsa

Software Package Probcalc from the Point of View of a User The development of Direct Optimized Probabilistic Calculation method (DOProC) started in 2002. DOProC applications are processed in ProbCalc - this software is being improved all the time. It is rather easy to implement an analytical transformation model of the specific probabilistic application into ProbCalc. The reliability function under analysis can be expressed in ProbCalc analytically as a sign arithmetic expression or can be expressed using data from the dynamic library. Programový Systém Probcalc z Hlediska Uživatele Metoda Přímého Optimalizovaného Pravděpodobnostního Výpočtu (dále jen POPV) je vyvíjena od roku 2002. V současné době již lze metodou POPV s využitím optimalizačních kroků výhodně řešit značné množství pravděpodobnostních úloh. Pro aplikaci metody POPV je možno použít stále vyvíjený programový systém ProbCalc, do něhož lze relativně jednoduše implementovat analytický transformační model řešené pravděpodobnostní úlohy.


Transactions of the VŠB: Technical University of Ostrava, Civil Engineering Series | 2010

Designing of Anchoring Reinforcement in Underground Workings Using Doproc Method

Petr Janas; Richard Šňupárek; Martin Krejsa; Vlastimil Krejsa

Designing of Anchoring Reinforcement in Underground Workings Using Doproc Method The anchoring reinforcement (roof bolting) ranks currently among important reinforcing solutions available in the mining industry and underground engineering. The reinforcement is sized on the basis of various theoretical assumptions and empirical pieces of knowledge. Generally it is assumed that the input values are clearly deterministic. This is valid for both the geotechnical conditions under which the anchors will be applied as well as for properties of the anchors that are influenced also by installation procedures. But most data used as inputs in various anchor sizing methods are random. Recently, applied Direct Optimized Probabilistic Calculation (DOProC) has started developing for the assessment of the reliability of building constructions. DOProC is also applicable for the design of anchors. An assumption for the application is a sufficient database of random quantities relating to the environment where the anchors will be installed, properties of the anchors and anchoring technologies, anchor design computational models and suitable and efficient tools for the probabilistic design of the anchoring reinforcement. Využití Metody Popv K Navrhování Kotevní Výztuže Důlních Děl Při navrhování kotevní výztuže se vychází z různých teoretických předpokladů a empirických poznatků. Zpravidla se přitom předpokládá, že vstupní hodnoty jsou jednoznačně dány deterministicky. Předložený příspěvek ukazuje postup pravděpodobnostního navrhování a posuzování spolehlivosti kotevní výztuže při aplikaci metody POPV (Přímého Optimalizovaného Pravděpodobnostního Výpočtu).


Archive | 2009

Structural Reliability Assessment using a Direct Determined Probabilistic Calculation

A. Petr Janas; Martin Krejsa; Vlastimil Krejsa


Archive | 2015

Structural reliability assessment using Direct Optimized Probabilistic Calculation with respect to the statistical dependence of input variables

Petr Janas; Martin Krejsa; Vlastimil Krejsa; R Briš


Procedia Engineering | 2016

Structural Reliability Analysis Using DOProC Method

Martin Krejsa; Petr Janas; Vlastimil Krejsa


Perspectives on Science | 2016

DOProC-based reliability assessment of steel structures exposed to fatigue ☆

Martin Krejsa; Petr Janas; Vlastimil Krejsa; Zdenek Kala; Stanislav Seitl


Advanced Materials Research | 2014

ProbCalc - An Efficient Tool for Probabilistic Calculations

Martin Krejsa; Petr Janas; Vlastimil Krejsa


Applied Mechanics and Materials | 2016

Application of the DOProC Method in Solving Reliability Problems

Martin Krejsa; Petr Janas; Vlastimil Krejsa


Archive | 2017

DOProC-based reliability analysis of structures

Petr Janas; Martin Krejsa; Jiří Šejnoha; Vlastimil Krejsa


publisher | None

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Martin Krejsa

Technical University of Ostrava

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Petr Janas

Technical University of Ostrava

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Jiri Brozovsky

Technical University of Ostrava

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Radim Čajka

Technical University of Ostrava

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Stanislav Seitl

Academy of Sciences of the Czech Republic

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Zdenek Kala

Brno University of Technology

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