The paper reports the results of a numerical investigation on masonry walls subjected to in-plane seismic loads. This research aims to verify the formulae of shear and flexural strength of masonry spandrels which are given in the recent Italian Standards [1]. Seismic pushover analyses have been carried out using finite element models of unreinforced walls and strengthened walls introducing reinforced concrete (RC) beams at the floor levels. Two typologies of walls have been considered distinguished for the height to length ratio h/l of the spandrels: a) short beams (h/l=1.33) and b) slender beams (h/l=0.5). Results obtained for the unreinforced and the strengthened walls are compared with equations for shear and flexural strength provided in Standards [1]. The numerical analyses show that the reliability of these equations is at least questionable especially for the prediction of the flexural strength. In the cases in which the axial force has not been determined by the structural analysis, Standards [1] seems to overestimate the flexural strength of short spandrels both for the unreinforced and the strengthened wall.
Seismic Response Of Masonry Plane Walls: A Numerical Study On Spandrel StrengthAIP Conference Proceedings / Michele Betti; Luciano Galano; Andrea Vignoli. - In: AIP CONFERENCE PROCEEDINGS. - ISSN 0094-243X. - STAMPA. - 1020:(2008), pp. 787-794. (Intervento presentato al convegno Seismic Engineering International Conference commemorating the 1908 Messina and Reggio Calabria Earthquake tenutosi a Reggio Calabria, Italy nel July 8-11, 2008) [10.1063/1.2963915].
Seismic Response Of Masonry Plane Walls: A Numerical Study On Spandrel StrengthAIP Conference Proceedings
BETTI, MICHELE;GALANO, LUCIANO;VIGNOLI, ANDREA
2008
Abstract
The paper reports the results of a numerical investigation on masonry walls subjected to in-plane seismic loads. This research aims to verify the formulae of shear and flexural strength of masonry spandrels which are given in the recent Italian Standards [1]. Seismic pushover analyses have been carried out using finite element models of unreinforced walls and strengthened walls introducing reinforced concrete (RC) beams at the floor levels. Two typologies of walls have been considered distinguished for the height to length ratio h/l of the spandrels: a) short beams (h/l=1.33) and b) slender beams (h/l=0.5). Results obtained for the unreinforced and the strengthened walls are compared with equations for shear and flexural strength provided in Standards [1]. The numerical analyses show that the reliability of these equations is at least questionable especially for the prediction of the flexural strength. In the cases in which the axial force has not been determined by the structural analysis, Standards [1] seems to overestimate the flexural strength of short spandrels both for the unreinforced and the strengthened wall.File | Dimensione | Formato | |
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2008 MERCEA08 - Seismic Response Of Masonry Plane Walls - A Numerical Study On Spandrel Strength.pdf
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