23) Seismic behavior of structural systems composed of cast in situ concrete walls

ABSTRACT: This research aims at obtaining an experimental evaluation of the seismic response of structural systems composed of cast in situ squat concrete walls. Such structural systems are widely used for construction in non seismic areas and appreciated for their (i) limited constructions costs, (ii) limited installation times, (iii) great constructions flexibility and (iv) high energy and acoustic efficiency.
The study of the seismic behavior of structural systems composed of cast in situ squat concrete walls has been developed only recently and lies mainly in the study of the behaviour of the single squat wall panel under cyclic lateral loading.
In recent years, the seismic behaviour of cast in situ squat concrete walls has been the object of few scientific research works. In particular, most of these works focus on the study of the in-plane behavior of single cast in situ squat concrete wall under increasing horizontal loading cycles. Such researches have shown that cast in situ squat concrete walls have optimum (better than that of frame systems) characteristics both in terms of (i) strength resources towards horizontal loads and (ii) ductility capabilities.The assessment of the seismic behavior and performances of such a structural system (which is intrinsically characterized by superior resistance to horizontal loads, as compared to the more common frame systems) may lead to changes/modifications in the way the common 4-5 storey high buildings (for European countries) are constructed in seismic areas.