WIT Press


Masonry Infills With Window Openings And Influence On Reinforced Concrete Frame Constructions

Price

Free (open access)

Paper DOI

10.2495/ERES090401

Volume

104

Pages

11

Page Range

445 - 455

Published

2009

Size

937 kb

Author(s)

D. J. Kakaletsis

Abstract

The influence of masonry infills with window openings on the seismic performance of reinforced concrete (RC) frames designed according to current code provisions is investigated. Seven third-scale, single-storey, single-bay frame specimens were tested under reversed cyclic, quasi-static, horizontal loading up to a drift level of 40‰. The parameters investigated include the opening location and the infill compressive strength. The assessment of the behaviour of the frames is attempted based on the observed failure modes, strength, stiffness, ductility, energy dissipation capacity, and degradation due to cycling. The experimental results indicate that the location of the window opening must be as near to the edge of the infill as possible in order to provide an improvement in the performance of the infilled frame. Specimens with strong infills exhibited better performance than those with weak infills. For the prediction of the lateral resistance of the studied single-bay, single-storey infilled frames with window openings, a special plastic analysis method has been employed with reference to typical damage modes. Furthermore, a continuous force-deformation model based on an equivalent strut approach is proposed for masonry infill panels containing window openings. The actual properties of the infill are based on the assessment of its lateral resistance by the subtraction of the response of the bare frame from the response of the infilled frame. Keywords: infilled RC frames, window opening, experimental results, plastic analysis, analytical modelling.

Keywords

infilled RC frames, window opening, experimental results, plastic analysis, analytical modelling.