Numerical Modelling of Thermal Insulation of Reinforced Concrete Ceilings with Complex Cross-Sections

Drobiec, Łukasz; Wyczółkowski, R.; Kisiołek, Artur

doi:10.3390/app10082642

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…As a result, a number of obstacles and problems were provoked, which immediately affected the quality of the educational process and activities of students. All this is due to the features of the distance learning format, which requires both the perfect technical support and high professional competence of teachers in the field of computer technology (Karataş & Tuncer, 2020;Drobiec et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Education in Universities in the Context of Distance Education

2022

JHETP

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The aim of this work is to analyze the framework and approaches to the organization of distance learning in schools and universities. To achieve this goal, the article used both theoretical and empirical methods of scientific research. Thus, the work was based on functional and systematic methodological approaches, as well as the method of analysis and synthesis, comparison, deduction, lesson observation, generalization of independent characteristics. As a result of the study both theoretical and practical aspects of the study were obtained. Accordingly, in the theoretical part the essence of the concept of distance education, its characteristics and features of the organization was disclosed. On the basis of the information received, a practical part was established in which ways and mechanisms for conducting distance learning classes in both secondary and higher education institutions in Ukraine were established. In future scientific papers related to distance learning, it is necessary to consider ways of using artificial intelligence to organize this type of learning process.

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Section: Introductionmentioning

confidence: 99%

Education in Universities in the Context of Distance Education

2022

JHETP

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“…It was shown in this context that the commonly used calculation of U-values does not precisely reflect the ceiling's thermal behaviour because the benefits of a construction's thermal mass are not taken into consideration [14]. It was shown that numerical models can be used to study the effects of thermal insulation on ceilings with complex cross sections [15]. Multi-sensor in situ measurements are an effective measure to test the validity of models [16,17].…”

Section: Introductionmentioning

confidence: 99%

Mitigating Harmful Effects of Climate Warming on Ceiling Paintings by Ceiling Insulation: An Evaluation Using Timed IR Imaging and Numeric Modelling

Kain

Idam²,

Huber³

et al. 2021

Sustainability

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Due to climate change, ceiling paintings in many historic buildings are subjected to increasingly high short-term temperature change, resulting in high thermal tension caused by the construction assembly. This article focuses on the combined use of timed IR imaging and numeric modelling to evaluate insulation measures on the upper side of a ceiling to reduce thermal tensions in the painting layers, overheating in summer as well as cooling down in winter. As a model room, the southern splendour stair hall in the Burgtheater Vienna was chosen. Famous ceiling paintings created from 1886 to 1888 by Gustav Klimt and his brother Ernst Klimt can be found on this ceiling. The results show that timed IR imaging is an adequate tool to study the transient thermal behaviour of ceiling paintings which are not accessible to standard sensor measurements. Moreover, it could be shown that the presented measurement technique is well suited to validate a numeric model. The latter was applied to evaluate the potential insulation on the top of the ceiling. It was shown that cooling loads and energy loss in the room underneath can be reduced and most importantly the thermal stress in painting layers is reduced. The findings are relevant as, due to global warming, the current situation in many buildings is worsening. Considering the great intangible cultural value of many ceiling paintings, the application of the presented evaluation strategy for building physical boundaries on a ceiling with paintings seems to be appropriate.

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“…Due to the extrusion method used during their production, the cross-section of panels can be easily shaped. Different types of filling inserts can reduce the weight of panels and improve their insulation properties [5][6][7]. Many tests have been performed in recent years, and new types of composite slabs have been designed.…”

Section: Introductionmentioning

confidence: 99%

The Behaviour of Half-Slabs and Hollow-Core Slab in Four-Edge Supported Conditions

et al. 2021

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In this study, qualitative tests were carried out to compare the behaviour of selected slabs exposed to short- and long-term loading. Full-scale models of the half-slab and hollow-core slab with dimensions of 6.30 m × 6.30 m, built of four different precast panels, were tested. The first two were semi-precast lattice girder slabs, the third semi-precast prestressed ribbed panels, and the last was composed of hollow-core panels. A common feature was the lack of joint reinforcement and the same modular width of 600 mm. The short-term load was applied sequentially in the first stage, and displacement was measured using an electronic method. In the second stage of long-term testing, the load was mainly applied to one part of the slab. Testing under short-term and long-term load allows determining the change in the performance of panel slabs over time. The panels maintained the ability of load redistribution based on their interaction despite the work of the longitudinal joints being only through the concrete cross-section. The behaviour of slabs with concrete topping shows more significant lateral interactions than elements connected only by shear key. Comparative calculations were made based on four computational models. Comparative analysis showed that the current design procedures lead to a safe but conservative estimation of the slab behaviour.

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Numerical Modelling of Thermal Insulation of Reinforced Concrete Ceilings with Complex Cross-Sections

Cited by 7 publications

References 23 publications

Education in Universities in the Context of Distance Education

Education in Universities in the Context of Distance Education

Mitigating Harmful Effects of Climate Warming on Ceiling Paintings by Ceiling Insulation: An Evaluation Using Timed IR Imaging and Numeric Modelling

The Behaviour of Half-Slabs and Hollow-Core Slab in Four-Edge Supported Conditions

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