Prohlížení Acta Polytechnica CTU Proceedings. 2022, vol. 36 dle názvu
Zobrazují se záznamy 1-20 z 34
-
A procedure to derive partial safety factors in textile-reinforced concrete members
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In the last decades, modern technological and research developments of textile-reinforced concrete have led to extensive applications in building and civil engineering structures all over the world. Examples of textile-reinforced ... -
A study on the effects of hidden safety when assessing existing structures
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In many instances, the safety of existing structures can no longer be demonstrated by standard code-based assessments. Reasons for this include changes in the code, changes in the demands on the structures and deterioration. ... -
Adaptive sequential sampling for reliability estimation of binary functions
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A novel method for estimation of rare event probability is proposed, which works also for computational models returning categorical information only: success or failure. It combines the robustness of simulation methods ... -
Artificial intelligence - finite element method - hybrids for efficient nonlinear analysis of concrete structures
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Realistic structural analyses and optimisations using the non-linear finite element method are possible today yet suffer from being very time-consuming, particularly in case of reinforced concrete plates and shells. Hence ... -
Assessment of existing structures under climate change
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Assessment of the influence of human activities on recent, current, and future global and regional climate conditions and extremes has advanced sufficiently to provide a reasonable measure of its impact across the globe. ... -
Comparison of the collapse frequency and failure probability of buildings
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In a previous study, the collapse frequencies and associated mortalities of buildings were compiled based on various publications. The investigation showed a considerable scattering of collapse frequencies depending on the ... -
Cost-optimization based target reliability for fire design of insulated steel columns
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Adequacy of a structural fire design can in theory be demonstrated through a probabilistic risk assessment (PRA) where the compliance with tolerability limits and the ALARP requirement are explicitly ascertained. However, ... -
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 ...