Prohlížení Acta Polytechnica CTU Proceedings. 2022, vol. 36 dle názvu
Zobrazují se záznamy 8-27 z 34
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Development of conformity criteria for durability and its influence on service life predictions
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)To ensure the quality of produced concrete batches, it is often verified whether a specified concrete compressive strength is reached by the application of conformity control. The conformity criteria used for this purpose ... -
Effect of decision parameter efficiency on target reliability
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Target reliability forms the basis of most modern design standards and is intended to represent an optimal balance of safety and risk of failure. Previous research noted discrepancies between target reliability obtained ... -
Establishing model uncertainty of SLS reinforced concrete crack models applied to load-induced cracking
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Although some research has been performed, serviceability limit state (SLS) concrete crack models have yet to be calibrated fully in probabilistic terms in structural design standards. This is partly due to the fact that ... -
Estimating running safety factor of ballastless railway bridges using tail modelling
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Excessive vertical acceleration of ballastless railway bridges subjected to vibrations induced by passing trains is one of the governing design criteria for bridges in high-speed lines. However, to the authors’ knowledge, ... -
Flood risk assessment for road infrastructures using Bayesian networks: case study of Santarem - Portugal
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Assessing flood risks on road infrastructures is critical for the definition of mitigation strategies and adaptation processes. Some efforts have been made to conduct a regional flood risk assessment to support the ... -
Full probabilistic design of a submerged floating tunnel and format for partial safety factors
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A submerged floating tunnel (SFT) can be a promising solution for crossing a deep or wide waterway. This innovative concept however lacks research into its probabilistic design. In this research, the reliability of the ... -
Influence of plastic tension chord deformation on the shear capacity of prestressed beam elements
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The shear strength of prestressed beam elements is of great interest with regard to the evaluation of existing concrete bridges. Accompanying extensive experimental test series, the adaptation and modification of existing ... -
Influence of the structural integrity management on the levelized cost of energy of offshore wind: a parametric sensitivity analysis
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The levelized cost of energy (LCoE) is an important measure to quantify the macro-economic efficiency of an offshore wind farm and to enable a quantitative comparison with other types of energy production. The costs of the ... -
Maximizing information obtained from standardized fire tests using a Bayesian framework
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Current practice is mostly focused on prescriptive design approaches where the performance of the structure in case of fire is assessed based on its performance in standardized fire tests. Those tests indicate whether the ... -
New or existing, does it matter?
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Both when designing new and when evaluating existing structures, methods of analysis must be based on established engineering theory and practice. Also, the general principles of structural reliability regarding the treatment ... -
On the effects of modified lane configuration due to construction works on bridge loading
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Construction works are frequently recurring events within highway networks, temporarily altering the characteristics of the traffic flow and hence of the bridge loading process. Consequently, highway bridge superstructures ... -
On the treatment of measurement uncertainty in stochastic modeling of basic variables
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The acquisition and appropriate processing of relevant information about the considered system remains a major challenge in assessment of existing structures. Both the values and the validity of computed results such as ... -
Practical concepts for the use of probabilistic methods in the structural analysis and reassessment of existing bridges - presentation of latest research and implementation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In structural engineering and bridge construction, probabilistic calculations are only performed in a few exceptional cases. The ability to directly use information from the existing structure is an important advantage of ... -
Probabilistic assessment and sensitivity analysis of existing concrete bridge via surrogate modeling
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The paper is focused on probabilistic assessment and sensitivity analysis of existing prestressed concrete bridge using surrogate model in form of Polynomial Chaos Expansion (PCE). The bridge was selected in the framework ... -
Probabilistic models for resistance variables in fib Model Code 2020 for design and assessment
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The fib Model Code offers pre-normative guidance based on the synthesis of international research, industry and engineering expertise. Its new edition (draft MC 2020) will bring together coherent knowledge and experience ... -
Probabilistic safety assessment of Koeberg spent fuel pool
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The effective management of spent fuel pool (SFP) safety has been raised as one of the emerging issues to further enhance nuclear installation safety after the Fukushima accident on March 11, 2011. SFP safety-related issues ... -
Reliability of a structure stricken by a tornado
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A tornado may become a very dangerous climatic action for any structure, depending on the tornado intensity and extent of the structure. The origin of a tornado, its range and further activity appear to be unpredictable ... -
Reliability of existing reinforced concrete slabs exposed to punching shear
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Selected standardised models for the verification of punching shear in reinforced concrete structures are applied for the probabilistic assessment of their reliability level. It appears that the models given in EN 1992-1-1 ... -
Risk based maintenance for Swiss railway bridges: concept, implementation and first experiences
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The Swiss Federal Railway (SBB) has an inventory of approx. 6,000 bridges. So far, condition classes of the individual bridges have been used for maintenance management. To improve the efficiency of the maintenance management, ... -
Semi-probabilistic assessment of existing bridge using simplified methods for estimation of variance
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The paper is focused on assessment of existing prestressed concrete bridge by simplified methods for estimation of coefficient of variation. The bridge was selected in the framework of the European Project INTERREG ...