Reinforcement and Measurement Method for Earthquake Damaged Masonry Buildings Tested on a Shaking Table

Abstract eng:
Experimental investigations about the behavior of Unreinforced Masonry (URM) structures in comparison with masonry structures reinforced with Fibre Reinforced Cement (FRC) is carried out on the large shaking table at the EU Centre in Pavia. The tests were part of the EU project Polyfunctional Technical Textiles against natural Hazards POLYTECT and POLYMAST. Intention of both projects within the 6th and 7th EU Framework Program is the development of multifunctional textiles with embedded sensors. For the purpose of the project a 5.8 m tall 2-storey test structure was built. Archetype of the structure was a typical historical building made of natural stones from the earthquake region “Abruzzo” in Central Italy. A 6.3 magnitude earthquake struck this region in 2009 (L’Aquila earthquake) and caused 260 losses, 1,000 injured and 28,000 homeless. In an optimization process different new developed textile and special mortar combinations were tested with small in-plane shear walls under cyclic horizontal displacements to find the optimal strengthening solution for masonry structures. In the first test, the unreinforced structure (URM) was analyzed under seismic impact. The ground acceleration was increased till nearly before collapse of the building. This damaged building was the basis for further investigation. For the second test the specimen was repaired and reinforced with a new developed FRC in a full covering solution on the surface outside the structure. The used fabric is a woven glass/polypropylene fibre combination in four directions.

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