Desempenho de painel de vedação vertical externa em Steel Framing composto por placas de madeira mineralizada

Abstract

The design panel designs for vertical seal to consider the user performance requirements is a challenge, given the need to reconcile the service to various criteria established normatively. In addition to the prescriptive rules, from 2013 became effective the performance standards of housing Building, according to NBR 15575. In this scenario, industrialized fence panels may offer some advantage to meet these new requirements, as well as being standardized and Quick implementation, have flexibility in the choice of materials for its composition and can thus be devised to meet the performance levels of internal and external vertical sealing system (SVVIE). In this sense, this research aimed to determine the level of thermal and structural performance, vertical fence panel structured Light Steel Framing and made externally by cement and wood plate mineralized and internally by plasterboard, designed for residential buildings. For structural performance analysis they were built specimens, simulating the seal in use, in order to evaluate the loads of occupation and impacts from accidental shocks and normal use of the building. Hard body tests, loads from suspended parts and soft body were performed. For thermal performance analysis, two methods were used, with the simple calculation, to determine the transmittance and the theoretical thermal capacity of panel and the method for protected hot box test, where through the samples in reduced size, was performed to characterize the proposed panel, following the procedures established by NBR 15575. evaluations of the panel indicated service user requirements for stability and security, from the use and occupation of the building, supporting actions of impact, vibration, loading the media suspended parts, resulting from normal use of the building. Performance levels recorded in the structural tests have shown compliance with the performance level Low (M). Regarding the thermal performance of the panel transmittance, capacity and theoretical panel thermal lag were equal to 2.00 W / m2K, 40.29 kJ / (m2.K) and 1,87h, not meeting the regulatory requirements of capacity Thermal and the thermal delay, not being this way, the panel likely to be classified as to the performance, this criterion can be determined by means of computer simulation. The thermal transmittance of the test panel, scaled-down was determined getting average value of 1.93 W / m2K, with a confidence interval between 1.77 and 2.08 W / m2K, confirming the theoretical value found in the search. The difference found is given because of the theoretical thermal conductivity properties of the components of the panels are different than those available on the market, as well as the environmental conditions of the test and the uncertainty of the individual measurements from sensors. It follows then that the panel has adequate structural performance, and the thermal performance of the panel should be evaluated by means of computer simulation in each building typology in which the panel is used in order to determine the level of thermal performance of the building.