- Seismic Behaviour of Masonry Arches with Tie-Rods: Dynamic Tests on a Scale Model
- C. Calderini ; S. Lagomarsino ; M. Rossi ; G. Decanio ; M.L. Mongelli ; I. Roselli
- Book Title / Journal: Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal
- Year: 2012 , Volume: , Series:
- Earthquake engineering
- Keywords: masonry arches ; Shaking table tests ; displacement capacity
- Description
- In arches and vaults, tie-rods play a decisive role in the control of horizontal thrusts produced by both permanent and seismic loadings. For these reasons, still today tie-rods are widely used as reliable technique for the reinforcement of masonry buildings. Usually, steel bars similar in size and shape to ancient ones and fixed to stonework by means of bolts or plates are adopted. However, some innovative solutions to improve the technique were recently proposed. The common aim of such solutions is to increase the displacement capacity and dissipation of the arch-pillars-rod system under seismic actions. In this paper, the effectiveness of flexible tie-rods to improve the seismic response of arch-pillars system is assessed by mean of shaking table tests and simple analytical models developed in the framework of performance-based design.
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- Enhancement of the seismic performance of AAC masonry by means of flat-truss bed-joint reinforcement
- A. Penna ; G. Magenes ; M. Rota ; M- Mandirola
- Book Title / Journal: 15th World Conference on Earthquake Engineering
- Year: 2012 , Volume: , Series:
- Earthquake engineering
- Keywords: horizontally reinforced masonry ; cyclic tests ; displacement capacity
- Description
- Only few experimental tests are available in the literature on bed-joint reinforced load-bearing masonry. These are performed on prototypes with different masonry typologies, often reduced scale and, in any case, only for a small number of combinations of slenderness, axial load and boundary conditions. This work presents the results
of an experimental campaign including in-plane cyclic tests on autoclaved aerated concrete (AAC) masonry panels with thin bed- and head-joints filled with glue-mortar. Some of the specimens are made of unreinforced masonry, whilst in other the masonry walls are reinforced by means of bed-joint flat-truss reinforcement only. Based on the results of these tests, complemented by specific tests performed on wallettes realised with the two
different construction techniques, a possible strength criterion is proposed. The results indicate that the inclusion of bed-joint reinforcement has the double effect of improving masonry resistance and displacement capacity, hence reducing damage.
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