Acta Polytechnica CTU Proceedings. 2022 ( vol. 32-39): Poslední příspěvky
Zobrazují se záznamy 201-220 z 290
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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 ... -
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 ... -
Structural reliability of hollow core slabs considering compressive membrane action
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Compressive membrane action can considerably improve the load bearing capacity of concrete slabs and beams in case of excessive loaded due to an accidental event. Currently, only limited research has been focusing on ... -
The role of multi-fidelity modelling in adaptation and recovery of engineering systems
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Significant research has been conducted in identifying optimal recovery and adaptation decisions in disruptive scenarios using engineering models. In this context, an aspect that has been target of limited research is that ... -
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 ... -
Structural reliability of existing rc beams strengthened with UHPFRC tensile layers
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A methodology for reliability analysis of reinforced concrete (RC) beams strengthened with ultra high-performance fibre reinforced concrete (UHPFRC) tensile layers is presented. The proposed methodology includes stochastic ... -
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 ... -
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 ... -
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. ... -
Structural flexural strengthening through material bonded to the concrete substrate
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article proposes an alternative method for the structural design of reinforced concrete elements strengthened in bending by metallic plates or fiber-reinforced polymer (FRP) bonded to the concrete substrate. It is ... -
Influence of steel fibers on the fatigue behavior of high-performance concretes under cyclic loading
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Due to the advancement of high-performance concretes, the development of filigree constructions has been improved in the last decades. However, as the demand to create more filigree designs increases, the vulnerability to ... -
Comparison between concrete stress diagrams according to the Brazilian standard ABNT NBR 6118: 2014
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This study aims to compare methods for the determination of concrete properties by means of the stress diagrams present in the Brazilian standard ABNT NBR 6118: 2014. The area under the stress diagram, the internal reactions, ... -
Quantitative analysis of the strength generating C-S-H-phase in concrete by IR-spectroscopy
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The C-S-H-phase is the most important strength generating phase in concrete and other cementitious materials. The analysis of C-S-H is therefore an important instrument of innovations in the field of concrete and its ... -
Improvement mechanism of recycled concrete using C-S-H type accelerator and modifying recycled aggregate by carbonation technology
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In Japan, there is concern that concrete blocks due to demolition will increase with the renewal of concrete structures. Although it has been used for roadbed materials as recycling, in recent years, aggregates are removed ... -
Physical properties of portland cement based concrete exposed at a depth of 3520 m in the Nankai Trough
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Concrete is widely used in large-scale construction of submarine infrastructure because of its high strength, durability, and ease of handling. However, knowledge of its durability in deep seawater is lacking. In the deep ... -
Thin concrete overlays wit carbon reinforcement on deteriorated concrete pavements
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In many countries, concrete pavements are normally built as Jointed Plain Concrete Pavements. Due to a lack of alternatives, repairing deteriorated concrete pavements usually requires the replacement of the complete pavement ... -
Engineering properties of geopolymer concrete: a review
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Geopolymer concrete (GPC) could be a solution that uses a cementless binder and recycled materials for producing concrete, while reducing the carbon dioxide emission and the demand for raw materials. In addition to the ... -
Glued timber concrete composite walls using ultra-high-performance concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This paper gives a short introduction of the development of cross laminated timber (CLT) concrete composite walls with a glued connection. In the composite walls, prefabricated ultra-high-performance concrete (UHPC) lamellas ... -
Using an analysis of concrete and cement epd: verification, selection, assessment, benchmarking and target setting
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Carbonation of concretes is a natural physico-chemical process that can be described as a reaction between the carbon dioxide contained in the air and the cement matrix. Carbonation concerns all concretes types in contact ... -
Unique and innovative technology for sustainable and efficient structural concrete made of 100% recycled aggregate from CDW
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)For supporting an environmental and social approach to the construction industry, the authors are bringing a new unique technology for maintaining the production of sustainable and efficient structural concrete made of ...