AAC (Autoclaved Aerated Concrete) masonry walls represent a very effective structural typology for thermal insulation purposes, light weight and workability especially for non structural masonry panels. The potential for structural applications is of great interest and presently under exploration, especially for areas with low seismic hazard. In this research the seismic behaviour of AAC panels has been assessed by cyclic testing of infilled frames and loadbearing walls: the performances of different solutions of slight reinforcements have also been compared and evaluated. Distributed horizontal reinforcements enhance strength, displacement capacity and energy dissipation in shear failure modes. The AAC infill panel significantly contributes to the overall lateral capacity of the r.c. frame and, due to its high deformability, it can be considered in the calculations up to the collapse limit state. The testing campaign has been completed by a cyclic test on an infill wall with a central opening: in this case some interesting differences in the damage localization and resisting behaviour have been observed. The test results on loadbearing masonry walls allow the first comparisons between different constructive technologies and to model and analyse the global seismic behaviour of AAC masonry buildings. Horizontal bed-joint reinforcement solution significantly increase the displacement capacity in rocking failure modes and enhance the shear strength. With some differences among different reinforcement solutions, the cyclic tests on the AAC masonry piers have shown a rather good displacement capacity and a significant hysteretic energy dissipation both in shear and rocking failure modes. INGLESE

Seismic performance of AAC infill and bearing walls with different reinforcement solutions

PENNA, ANDREA;MAGENES, GUIDO;
2008-01-01

Abstract

AAC (Autoclaved Aerated Concrete) masonry walls represent a very effective structural typology for thermal insulation purposes, light weight and workability especially for non structural masonry panels. The potential for structural applications is of great interest and presently under exploration, especially for areas with low seismic hazard. In this research the seismic behaviour of AAC panels has been assessed by cyclic testing of infilled frames and loadbearing walls: the performances of different solutions of slight reinforcements have also been compared and evaluated. Distributed horizontal reinforcements enhance strength, displacement capacity and energy dissipation in shear failure modes. The AAC infill panel significantly contributes to the overall lateral capacity of the r.c. frame and, due to its high deformability, it can be considered in the calculations up to the collapse limit state. The testing campaign has been completed by a cyclic test on an infill wall with a central opening: in this case some interesting differences in the damage localization and resisting behaviour have been observed. The test results on loadbearing masonry walls allow the first comparisons between different constructive technologies and to model and analyse the global seismic behaviour of AAC masonry buildings. Horizontal bed-joint reinforcement solution significantly increase the displacement capacity in rocking failure modes and enhance the shear strength. With some differences among different reinforcement solutions, the cyclic tests on the AAC masonry piers have shown a rather good displacement capacity and a significant hysteretic energy dissipation both in shear and rocking failure modes. INGLESE
2008
9781920701925
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/468667
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