Experimental and numerical thermal analysis of a balcony board with integrated glass fibre reinforced polymer GFRP elements

Published on Jan 1, 2007in Energy and Buildings5.879
· DOI :10.1016/J.ENBUILD.2006.05.002
Karim Ghazi Wakili9
Estimated H-index: 9
 (Empa: Swiss Federal Laboratories for Materials Science and Technology), Hans Simmler10
Estimated H-index: 10
 (Empa: Swiss Federal Laboratories for Materials Science and Technology), Thomas Frank4
Estimated H-index: 4
 (Empa: Swiss Federal Laboratories for Materials Science and Technology)
Source
Abstract
Abstract The thermal behaviour of a balcony board with integrated glass fibre reinforced plastic (GFRP) elements replacing the compression reinforcement rods, is investigated by means of measurement as well as numerical analysis. For this reason a specimen consisting of an externally insulated brick wall and a representative part of a balcony is tested under a steady state temperature gradient of 30 K in a guarded hot box. Additionally to the normative requirements, temperature sensors are placed on critical sites within the construction, prior to the pouring of cement, to help the verification of the numerical analysis carried out simultaneously. Measured and calculated results are compared and some numerical parameter studies are carried out to quantify the advantage of glass fibre reinforced plastic elements over conventional balcony boards from a thermal point of view.
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Aug 1, 2006·Applied Energy9.75
#1T. Nussbaumer (Empa: Swiss Federal Laboratories for Materials Science and Technology)H-Index: 2
#2K. Ghazi Wakili (Empa: Swiss Federal Laboratories for Materials Science and Technology)H-Index: 18
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A concrete wall externally insulated with six expanded polystyrene boards, each containing three vacuum insulation panels, was investigated both experimentally and numerically. The main goal of this study was to determine the thermal performance of vacuum-insulation panels applied to walls in building constructions. Comparisons were made with conventional insulation and also with systems including damaged, i.e., vented vacuum panels. Since the vacuum insulation panels are encased in a metallized...
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Nov 1, 2005·Energy and Buildings5.88
#1T. Nussbaumer (Empa: Swiss Federal Laboratories for Materials Science and Technology)H-Index: 2
#2R. Bundi (Empa: Swiss Federal Laboratories for Materials Science and Technology)H-Index: 1
Last. H. Muehlebach (Empa: Swiss Federal Laboratories for Materials Science and Technology)H-Index: 1
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Abstract A wooden door leaf with two integrated vacuum insulation panels (VIPs) was investigated both experimentally and numerically. The main goal of this study was to determine the impact of damaged vacuum insulation panels on the thermal performance of the overall door system. Since the metal fittings act as thermal bridges in a highly insulating system, special attention was given to this effect. Comparison of the measured and calculated results reported here permit assessment of the feasibi...
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Many buildings have considerable thermal bridges at the junction of balcony slabs with walls. To achieve the new EU directive targets related to energy efficiency, greater attention should be paid to such design details. This study analyzes the efficiency of traditional balcony slab modernization methods, the use of modern insulation materials and a new alternative system: an added self-supporting light balcony system (LKBD) in retrofitted large-panel buildings. The main objective was to capture...
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Nov 28, 2020·Sustainability3.25
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The evaluation of thermal bridges in buildings, following the UNI TS 11300-1:2014 standard, must be carried out with finite element analysis or through the use of atlases compliant with the UNI EN ISO 14683:2018. The paper illustrates the development of an analytical tool to determine the internal linear thermal transmission coefficient (ψi) for the thermal bridge between concrete wall and inter-floor slab, neglected in the main existing catalogs or atlases. This type of thermal bridge is releva...
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Mar 15, 2020·Energy and Buildings5.88
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Abstract Recently, the structural insulated panels (SIPs) with the wood-based surfacing materials are developed in housing industry to increase the thermal efficiency of the wall system. In order to integrate the waterproof feature into SIPs, a newly designed GFRP reinforced squared tube sandwich panel (GSTPs) is introduced, where the Glass fibre reinforced polymers (GFRP) is utilized as surface material and the core is reinforced by the GFRP square tube. This paper focused on the thermal insula...
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Aug 22, 2019·Buildings2.65
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A common envelope performance problem in buildings is thermal bridging through balcony slab connections, which can be improved with the use of commercially available thermal break products. Several prior studies have used simulation-based and/or hot box test apparatus approaches to quantify the likely effect of balcony thermal breaks on effective thermal resistance of building enclosures. However, in-situ measurements of thermal performance in real buildings remain limited to date. This study us...
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Abstract This research mainly focuses on the experimental setup of the Hot Box Test Method and comparison of different models for measurement of thermal properties of building envelope systems. Hot Box Test Method has long been used to determine the thermal properties of building envelope systems, however, the steady-state assumption for calculation is not always desired, especially when the environmental conditions cannot be controlled. To utilize models considering the dynamic behavior of buil...
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Increasing building energy performance has become an obligatory objective in many countries. Thermal bridge is a major cause of poor energy performance, durability, and indoor air quality of buildi...
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#1Pisey Keo (INSA: Intelligence and National Security Alliance)H-Index: 2
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The level of energy performance requirements in buildings has substantially increased over the last twenty years. As a consequence, a large thickness of thermal insulation has to be used and the reduction of thermal bridges is necessary. This reduction becomes a main concern for structural design, particularly, at wall to balcony connections which cannot be left monolithic for concrete buildings with external thermal insulations in. For that kind of connections, a thermal break system (TBS) must...
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Sep 15, 2016·Composite Structures5.41
#1Kyriaki Goulouti (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 3
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Abstract Energetically critical points in thermally insulating building envelopes are caused by penetrations of building interior concrete slabs through the envelope insulation layers to create external balconies. A new highly insulating balcony thermal break element has been developed which enables both structural continuity and thermal insulation in the envelope’s insulation layer. The element is composed of combined structural and thermally insulating AFRP/GFRP loop and sandwich components. T...
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