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In-plane seismic response of brick masonry walls

✍ Scribed by Magenes, Guido; Calvi, Gian Michele

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
389 KB
Volume
26
Category
Article
ISSN
0098-8847

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✦ Synopsis

The paper addresses the problems of evaluation of strength, deformability, and energy dissipation capacity of unreinforced brick masonry walls, within the context of seismic assessment of existing buildings. Possible approaches to simplified strength evaluation are discussed on the basis of experimental and numerical data, and formulae for assessment are presented. The role of the shear ratio in the shear failure mechanisms is put in evidence and shear strength formulae are proposed accordingly. The most significative parameters regarding deformability under cyclic loading are highlighted and energy dissipation due to hysteretic behaviour is quantified for possible use in dynamic models. Experimental results show how ultimate drift seems to be a parameter with high regularity for walls failing in shear. Based on such result, a possible approach for seismic assessment is outlined.

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The results of tests of plain and confined masonry walls with h/l ratio equal to 1β€’5, made at 1 : 5 scale, have been used to develop a rational method for modelling the seismic behaviour of confined masonry walls. A trilinear model of lateral resistance-displacement envelope curve has been proposed,

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The damage model for mortar joints proposed in the companion paper (Reference 1) is here applied to an extended approach for the evaluation of the lateral response of in-plane loaded brick masonry shear walls. The continuum model considered here is based on the simplifying assumption of an equivalen

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The response of brick masonry walls to in-plane horizontal cyclic loads analogous to those induced during seismic events is analysed by applying constitutive models which take into account the mechanical behaviour of each component and its interfaces, i.e. decohesion and slipping in the mortar joint