RetroInf - Developing Innovative Solutions for Seismic Retrofitting of Masonry Infill Walls

Publications

Modelling of masonry infill walls participation in the seismic behaviour of RC buildings using OpenSees

Publication . Furtado, André; Rodrigues, Hugo; Arêde, António

Recent earthquakes show that masonry infill walls should be taken into account during the design and assessment process of structures, since this type of non-structural elements increase the in-plane stiffness of the structure and consequently the natural period. An overview of the past researches conducted on the modelling of masonry infilled frame issues has been done, with discussion of past analytical investigations and different modelling approaches that many authors have proposed, including micro- and macro-modelling strategies. After this, the present work presents an improved numerical model, based on the Rodrigues et al. (J Earthq Eng 14:390–416, 2010) approach, for simulating the masonry infill walls behaviour in the computer program OpenSees. The main results of the in-plane calibration analyses obtained with one experimental test are presented and discussed. For last, two reinforced concrete regular buildings were studied and subjected to several ground motions, with and without infills’ walls.

2015-04-15Journal article

Open access

Experimental Characterization of the In-plane and Out-of-Plane Behaviour of Infill Masonry Walls

Publication . Furtado, André; Rodrigues, Hugo; Arêde, António; Varum, Humberto

The infill masonry (IM) walls are considered non-structural elements but, when subjected to earthquakes, they tend to interact with the surrounding RC frames, which can result in different failure modes depending on the combinationof the in-plane and the out-of-plane behaviour. Therefore,the contribution of infill masonry panels should be considered in the structural response analysis of existing buildings, for which understanding the out-of-plane non-linear behaviour of IM walls is paramount to develop efficient strengthening solutions to prevent and improve their performance in future earthquakes and, consequently,to reduce their seismic vulnerability. In order to obtain further knowledge concerning the out-of-plane response of IM panels, anexperimental testing campaign of full scale IM walls was started at the Laboratory of Earthquake and Structural Engineering - LESE by performing three experimental (cyclic and monotonic) out-of-plane tests with and without previous in-plane damage. The general specimen dimensions are representative of thoseexisting in a large portion of the Portuguese building stock according to recent studies. The experimental campaign and test setup will be described and the experimental tests' results will be presented and discussed in the paper, namely in terms of hysteretic force-displacement curves and damage evolution.

2015Journal article

Open access

Keywords

RC masonry infilled frames,Experimental characterization,numerical modelling,fibre textile based retrofitting materials, Engineering and technology ,Engineering and technology/Civil engineering

Funding agency

Fundação para a Ciência e a Tecnologia, I.P.

Funding programme

Concurso de Projectos de Investigação Científica e Desenvolvimento Tecnológico em todos os Domínios Científicos - 2010

Funding Award Number

PTDC/ECM/122347/2010