Abstract
In arches and vaults, tie-rods play a decisive role in counterbalancing horizontal thrusts produced by both permanent and seismic loadings. In this paper, the effectiveness of flexible tie-rods to improve the seismic response of arch-pillars system is assessed by means of shaking table tests and simple analytical models, developed in the framework of displacement-based design. The reduced scale model, made of rigid blocks with dry joints, has been tested without tie-rod and considering different configurations of strengthening. Both experimental and theoretical results have proved the importance, in particular for this kind of flexible masonry structure, of improving displacement capacity rather then strength, because in this latter case other brittle mechanisms could be activated. The paper shows the possibility of describing the dynamic seismic response of rocking masonry structures, characterized by complex mechanisms made of many blocks and hinges, by an equivalent nonlinear SDOF system.
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Acknowledgments
The results have been achieved in the project PERPETUATE (www.perpetuate.eu), funded by the European Commission in the Seventh Framework Programme (FP7/2007-2013), under Grant Agreement No. 244229.
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Calderini, C., Lagomarsino, S., Rossi, M. et al. Shaking table tests of an arch-pillars system and design of strengthening by the use of tie-rods. Bull Earthquake Eng 13, 279–297 (2015). https://doi.org/10.1007/s10518-014-9678-x
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DOI: https://doi.org/10.1007/s10518-014-9678-x