Acta Polytechnica CTU Proceedings. 2022 ( vol. 32-39): Poslední příspěvky
Zobrazují se záznamy 161-180 z 290
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Experimental investigation on the mechanical behaviour of AAC blocks for sustainable concrete masonry
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)To satisfy the increasing demand of energy efficient buildings, AAC manufacturers are nowadays encouraged to produce blocks with ever lower densities. However, a compromise between energy-saving requirements and mechanical ... -
The role of conceptualization in the evaluation of sustainable concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Improvement of the sustainability of concrete materials will be realized through the development of analytical tools that facilitate sustainable design and evaluation. However, these processes may be dependent on how ... -
Benefits of pervious concrete for urbanized habitats
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Pervious (draining) concrete is a new generation concrete which, for its structure, allows rainwater to enter the subsoil and at the same time is determining the final surface without the need for any additional layer. ... -
Bending behavior of adhesively-bonded engineered wood-concrete composite decks
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Four-point bending tests were conducted on five medium-sized (i.e., 2300 mm in length and 215 mm in width) engineered timber (laminated veneer lumber (LVL) and cross-laminated timber (CLT)) - concrete (wood chip concrete ... -
Fundamental properties and durability of slope protection spray mortar reinforced with bamboo fibers
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In order to enhance resistance against cracking and durability, short fibers such as steel and organic fibers have been conventionally mixed into spray mortar used for slope protection. In this research, fundamental ... -
Uncertainty assessment for the Bayesian updating process of concrete strength properties
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Reassessment of infrastructure buildings has become an essential approach to deal with increasing traffic loads on ageing infrastructure buildings and to verify the service-life of those structures. Good estimation of the ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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, ... -
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 ... -
Advanced hybrid nonmetallic composite reinforcement for concrete structures
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)During the last decades, fiber reinforced polymer (FRP) reinforcing bars for concrete structure has been extensively investigated and a number of FRP bars became commercially available. However, major shortcomings of the ... -
Effect of superplasticizer on the strength of fly ash based geopolymer concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In this research, the effect of a polycarboxylate based superplasticizer on the strength of Geopolymer Concrete (GPC) was investigated. A fixed amount of superplasticizer (1.5 % of Fly Ash weight) was utilized along with ... -
Critical assessment of CO2 emission of different concretes: foamed, lightweight aggregate, recycled and ordinary concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Construction materials contribute to about 75% of the CO2 emission of all the construction processes. Concrete is one of the most widely used construction materials and is thus primarily responsible for CO2 emission. In ... -
Limitations of life cycle assessment of green concretes - a state-of-the-art review
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)There have been numerous researches focusing on the alternatives to conventional concrete regarding environmental benefits and trade-offs. For this purpose, nowadays, the Life Cycle Assessment (LCA) is widely used. Until ... -
RC deck - stiffened arch existing bridges: simulated design and structural analysis
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The 20th century is known as the age that gave birth to the largest reinforced concrete structures. Many applications of this new material were realized at that time, both from a theoretical and practical point of view. ... -
High thermal conductivity concrete for energy piles
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Research is increasingly focusing on thermal properties of concrete with the aim of reducing the heat exchange between buildings and environment. On the other hand, concretes with high thermal conductivity could have ... -
Durability of GFRP connectors under sustained compression load for use in sandwich walls
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Precast concrete sandwich panels are used to fulfil the rising thermal requirements. The sandwich walls consist of three layers, a facing, a thermal insulation layer, and a load bearing layer. The two outer layers are ...