Behaviour of unreinforced and reinforced masonry wallettes made of ACC blocks subjected to diagonal compresion

• Autorzy: Kałuża M. , Kubica J.

Warianty tytułu

PL

Zachowanie się niezbrojonych i zbrojonych murowanych elementów wykonanych z bloczków z autoklawizowanego betonu komórkowego poddanych ukośnemu ściskaniu

• Języki publikacji: EN

Abstrakty

EN

For more than 10 years, masonry units made of ACC turned out to be one of the most popular materials used in the construction of residential buildings in Poland and other European countries. The recommended technology for erecting such structures requires using thin bed joints and non-filled head joints. Unfortunately, masonry buildings erected using this technique are prone to damage and cracks. One of the methods to guarantee improvement of cracking resistance of this type of structure is using a special prefabricated reinforcement to be placed in bed joints. The main objective of the investigation presented here was to analyse the behaviour of unreinforced and reinforced, with prefabricated truss-type called MURFOR^®, masonry walletts. All specimens were subjected to diagonal compression. Three groups of specimens were tested, each using a different mortar coating Testing was especially focused on the main technological problem of the proper adhesion between mortar and the reinforcement surface.

PL

Od ponad 10 lat elementy wykonane z autoklawizowanego betonu komórkowego są jednym z najbardziej popularnych materiałów stosowanych do wznoszenia budynków mieszkalnych zarówno w Polsce, jak i Europie. Zalecana technologia wykonywania konstrukcji z takich materiałów wymaga stosowania cienkich spoin wspornych i niewypełnionych spoin czołowych. Niestety konstrukcje wznoszone w tej technologii są podatne na zarysowania. Jedną z metod ograniczania zarysowań jest wprowadzenie do spoin wspornych prefabrykowanego zbrojenia. Głównym celem prezentowanych badań jest analiza zachowania się muru niezbrojonego oraz zbrojonego zbrojeniem typu MURFOR^®. Badane elementy poddano ukośnemu ściskaniu. Przebadano trzy grupy elementów próbnych, różniące się sposobem otulenia zbrojenia zaprawą. W trakcie analizy zwrócono szczególną uwagę na główny technologiczny problem, dotyczący zapewnienia prawidłowej przyczepności zbrojenia do elementu murowego.

Słowa kluczowe

EN

ACC blocks; diagonal compression; reinforced masonry; shear strength

PL

bloczek z betonu komórkowego; ukośne ściskanie; zbrojone mury; wytrzymałość na ścinanie

• Wydawca: Wydawnictwo Politechniki Krakowskiej im. Tadeusza Kościuszki
• Czasopismo: Czasopismo Techniczne. Budownictwo
• Rocznik: 2013
• Tom: R. 110, z. 1-B
• Strony: 79--94
• Opis fizyczny: Bibliogr. 13 poz., wz., il., tab., wykr.

Twórcy

autor

Kałuża M.

• Department of Structural Engineering, Faculty of Civil Engineering, Silesian University of Technology, Gliwice

autor

Kubica J.

• Department of Structural Engineering, Faculty of Civil Engineering, Silesian University of Technology, Gliwice

Bibliografia

• [1] EN 845-3:2000. Specification for ancillary components for masonry – Part 3: Bed joint reinforcement of steel meshwork, CEN, 2000.
• [2] Nolph S.M., In-plane shear performance of partially grouted masonry shear walls, Master thesis, Washington State University, 2010.
• [3] Kubica J., Kałuża M., Diagonally compressed AAC Block’s masonry – effectiveness of strengthening using CRFP and GRFP laminates, Proceedings 8th International Masonry Conference, Masonry (11), Ed. by W. Jäger, B. Haseltine & A. Fried, Dresden 2010, 419-428.
• [4] EN 1996-1-1:2005 EUROCODE 6, Design of Masonry Structures – Part 1-1: Common Rules for Reinforced and Unreinforced Masonry Structures, CEN, 2005.
• [5] Sheppard P., Tercely S., Turnšek V. The influence of horizontally placed reinforcement on the shear strength and ductility of masonry walls, Proceedings 6th WCEE, New Dehli 1977.
• [6] Tercely S., Sheppard P., The load-carrying capacity and deformability of reinforced and unreinforced masonry walls, Proceedings CIB W23 Commission Symposium on Wall Structures, Vol. I, Warszawa 1984.
• [7] Tomažević M., Žarnić R., The effect of horizontal reinforcement on the strength and ductility of masonry at shear failure, Proceedings 7th International Brick Masonry Conference, Vol. II, Melbourne 1985.
• [8] Jasiński R., Load-bearing capacity and deformability of reinforced masonry walls sheared horizontally, (in Polish), PhD Thesis, Politechnika Śląska, Gliwice 2005.
• [9] Piekarczyk A., Load-bearing capacity and deformability of reinforced masonry walls subjected to shearing in vertical direction (in Polish), PhD Thesis, Politechnika Śląska, Gliwice 2005.
• [10] Tomažević M., Lutman M., Design of reinforced masonry walls for seismic actions, Proceedings 8th International Brick Masonry Conference, Vol. II, Dublin 1988.
• [11] Kubica J. Kałuża M., Comparative tests of diagonally compressed unreinforced and bed joint reinforced masonry made of acc block, Proceedings 7th International Conference AMCM’2011, Kraków, 2011.
• [12] RILEM LUMB 6, Diagonal Tensile strength. Tests of Small Wall Specimens, TC 73 – LUM, 1991.
• [13] ASTM E519-81 1981, Standard Test Method for Diagonal Tension (Shear) in Masonry Assemblages, American Society for Testing Materials.

Uwagi

EN

Research works presented in this paper were carried out at the Department of Structural Engineering with partially financial support of BEKAERT S.A., Zwevegem, Belgium and own university grant of Politechnika Śląska in Gliwice.