Research and development of energy-efficient materials have been essential for sustainable infrastructure growth. A considerable amount of money is being spent on various energy stabilization techniques worldwide to attain thermal comfort in buildings. Thus, lowering the energy demand through green materials is vital to save energy and the environment. In this paper, a new form of Structural Insulated Panel (SIP) has been developed and referred to as Ferro Cellular Lightweight Concrete Insulated Panel (FCIP). Comparative thermal efficiency and acoustic performance of FCIP and brick masonry walls have been tested experimentally. The thermal results show that FCIP allows just 2ºC rise in the internal temperature of the room chamber in two hours, whereas the brick masonry allows 9.5ºC rise in the internal temperature of the room chamber for the same period. Similarly, the acoustic results show that FCIP has 0.85 sound absorption coefficient compared to 0.2 for brick masonry wall. Further, the cost-benefit analysis was conducted based on the electricity consumption results of a building produced by the eQuest energy simulation program. The outcome shows that the building’s lifetime running cost gets reduced to 50% when FCIP replaces the concrete/brick masonry envelope.
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Podczas badań laboratoryjnych uzyskano mniejsze naprężenie dopuszczalne przy ściskaniu w poprzek włókien (docisku) wyznaczone na modelach rzeczywistych, niż wynikałoby to z obliczeń zgodnie z zaleceniami PN-EN 1995-1-1:2010. Dotyczy to wszystkich budynków szkieletowych, w których wykorzystywane jest drewno świerkowe (Picea Abies). Zaobserwowano także odmienny sposób zniszczenia z uwagi na docisk, niż wynika to z założeń normy, co do powierzchni współpracującej w przenoszeniu obciążeń ze słupków ściany na elementy podwalinowe.
EN
The lower values of the allowable compressive stresses in direction perpendicular to the grains (bearing strength of wood) have bean obtained in the experimental tests on the real models ehan obtained theoretically in accordance with the PN-EN 1995- 1-1:2010. This issue applies to all types of timber frame buildings where spruce wood (Picea Abies) is used. Different modes of failure due to compression perpendicular to the grain than it results from the assumptions of the standard, especially when taking into account the surface cooperating in the transfer of loads from the wall posts to the sill plates was also observed.
W pracy zaprezentowano wyniki badań sztywności i wytrzymałości na obciążenie poziome ścian szkieletowych budynków drewnianych. Badaniom poddano sześć typów ścian różniących się budową i grubością. Poszycie ścian oprócz mocowania za pomocą łączników zostało przyklejone do szkieletu drewnianego. Badania wykonano według normy PN-EN 594:2011. Uzyskane wyniki zestawiono w formie wykresów F – v (gdzie: F jest siłą poziomą, a v przemieszczeniem poziomym górnej krawędzi). Ponadto podano siły niszczące Fmax oraz obliczono sztywność poszczególnych ścian.
EN
In the article results of stiffness and load bearing tests under horizontal load of timber frame walls are presented. Six different types of walls were tested. The difference between panels is their structural configuration and thickness. Structural sheathing was glued and mechanically fixed to the frame. The test were conducted according to PN-EN 594:2011. The results are presented on F-v graphs (where: F is the horizontal force and v is the horizontal displacement of the upper edge). Furthermore, ultimate forces Fmax are presented and stiffness of every wall was calculated according to aforementioned code.
The paper presents numerical simulations of the behavior of sandwich panels loaded by static concentrated force. Two model classes (2D and 3D) are considered, and the results are compared with the effective width method. The comparison mainly concerns the displacements and stresses in the facings. The obtained results indicate the areas of conformity between the models but also show significant differences between them. The observed local effects are discussed and the surprising location of extreme stress in the facings is demonstrated.
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Wykorzystanie laserów dużej mocy w obróbce materiałów wzrasta w ciągu ostatnich pięciu lat. W pracy przedstawiono wyniki prób spawania laserem włóknowym YRL 10 000 paneli ścian szczelnych. Przeprowadzono próby spawania połączenia doczołowego rura-płaskownik. Najlepsze rezultaty uzyskano przy spawaniu hybrydowym laser + MAG wiązką o mocy 9 kW.
EN
High-power fiber lasers for materials processing have undergone a rapid development process within the past five years. The results of welding tests of panel sheet of boiler by fiber laser were presented. It was butt joint: pipe with plate, typical for panel sweet. The best results were obtained by hybrid welding MAG + Laser (9 kW).
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The paper presents analytical determination methodology of fire-resistance limits of reinforced concrete slabs and wall panels. That flat multilayered structural elements could, also be parts of three-dimensional modules of building. The developed calculation method of fire-resistance limits makes it possible to determine the temperature distribution within the body of a structural element, and to define the actual stress-strain state of a structural element. The numerical-analytical method is used for calculations. Bubnov-Galyorkin method is used in two directions and differential character of the calculation retained in the perpendicular to the plate direction. Thus, an approach has been developed which makes it possible to evaluate fire-resistance of single- and multilayered flat structures by means of analytical determination; the three dimensional strain capacity character of structures are taken into consideration.
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