|
| |
|
| |
|
|
Future of reliability assessment of steel structures
Marek, Pavel ; Guštar, M. ; Lokaj, A.
The rapid development of computer technology makes it possible to anticipate significant improvements in the reliability assessment of steel structures, During the last two decades through the development of the SBRA method, a significant adjustment of the assessment of structural safety, serviceability and durability is now feasible. The probabilistic approach introduces next representation of loads and all other variables affecting the reliability, while the interaction of all variables can be considered using the first as well as second order theory analysis.
|
|
| |
|
|
Pravděpodobnostní přístup k určování požární odolností kombinovaného prutu
Rieger, M. ; Pustka, D. ; Marek, Pavel
Determination of the final fire resistance of composite columns made of concrete filled hollow sections. Calculation is based on achievement of critical temperature on steel tube with respecting section ratio Am/V. Final fire resistance is determined respect to influence of concrete filling, second order stability modeling and fully probabilistic approach. Article demonstrates application of the probabilistic method SBRA (Simulation Based Reliability Assessment) in fire resistant calculation.
|
|
|
Pravděpodobnostní model a určení spolehlivosti aplikované na desintegraci platinové rudy
Frydrýšek, K. ; Marek, Pavel
This paper focuses on a numerical analysis of the hard rock (ore) disintegration process. The bit moves into the ore (i.e. mechanical contact with friction) and subsequently disintegrates it. The disintegration (i.e. stress-strain relationship, reaction forces and fracture of the ore etc.) is solved via the FEM in combination with SBRA (Simulation-Based Reliability Assessment) Method. The ore is disintegrated by deactivating the FE which satisfy the fracture condition. Material of the ore (i.e. yield stress, fracture limit, etc.), is given by stochastic inputs. The results are compared with experiments.
|
|
| |
|
|
Pravděpodobnostní posudek spolehlivosti potrubí s korozně-napěťovými trhlinami metodou SBRA
Václavek, L. ; Marek, Pavel ; Gajdoš, Lubomír
The subject of the paper is a demonstration of the probabilistic assessment method of a pressure pipeline damaged by a system of stress corrosion crack. The fracture criterion is based on the fact that in the instant of the fracture the magnitude of the J-integral is equal to its critical value. First the fracture criterion is evaluated deterministically for nominal values of input quantities. Then attention is paid to incorporation of the randomness input quantities and the quantification of its influence on the probability of failure calculated using SBRA method, utilizing the Monte Carlo simulation technique.
|
|
| |
|
| |
guest ::
