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Rocking in Presence of Cracking of Masonry Wall Piers

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Abstract:

The wall pier represents the vertical element of multi-storey walls with openings, the main resistant structural components of a masonry building. Structural systems of wall piers and spandrels are required to sustain the in-plane seismic actions acting on the wall, opposing with their weights to the action of horizontal forces. The behavior of masonry constructions results to be very far from the one characterizing ductile structures, because of the lack of energy dissipation during the deformation. A strength resource of masonry structures, properly reinforced in order to avoid early local failures, consists in exhibiting rocking behavior, until a failure condition is attained. An investigation on the dynamic behavior of masonry wall piers is carried out by following Housner’s studies and properly introducing the effect of diagonal cracks, shown by typical post-earthquake cracking patterns. As a consequence, the system is characterized by the detachment of a lower triangular region that becomes ineffective during the development of the mechanism and does not oppose with its weight to the overturning. Finally, it is shown that the occurrence of diagonal cracks can be prevented by the execution of suitable retrofit interventions.

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Periodical:

Key Engineering Materials (Volume 747)

Pages:

678-685

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.747.678

Citation:

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Online since:

July 2017

Authors:

Fabio di Carlo*, Simona Coccia, Mario Como

Keywords:

Constant Acceleration Pulse, Cracking, Masonry Pier Walls, No Tension Assumption, Rocking, Seismic Strength

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* - Corresponding Author

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