DOI: 10.5593/SGEM2014/B62/S26.037


M. Pastrav, C. Baera, H. Szilagyi
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-21-6 / ISSN 1314-2704, June 19-25, 2014, Book 6, Vol. 2, 283-290 pp

The concept of smart or green or eco-friendly building is usually referring to the energy efficiency of the buildings dealing with the passive or active measures to achieve zero energy consumption. The attention is focused on the reducing the loss of heat, the efficiency of lighting and other types of energy consumption in buildings. The proposed concept of self managing buildings is focused on the new design and detailing of the building structures, and advanced materials rather than on the insulation materials or the building equipment. This new concept is based on experimental studies on the behavior under seismic type loadings of a different kind of reinforced concrete frame structure as well as on the special characteristics of advanced cement-based grouts used as self-healing materials. The reinforced concrete frame structure is made out of precast elements assembled by non-adherent partial post-tensioning. The detailing of the column-girder joints, called modified special hybrid joint, consist of two different type of horizontal einforcement
which go through the beams ends and the column and in the interfaces gaps a high resistance grout is used. The former type of reinforcement is made of strands, used also for the general structural assembly by post tensioning, and is located in the centroid of the beams. The latter consist of ductile steel bars, located at the beam top and bottom ends, having the role of bending moment transfer and also of energy dissipation, mainly due to their plastic behavior under extreme loadings. As for the interface grout the innovative solution is the use a high resistance fiber reinforced self-healing cementitious compounds. The paper emphasizes the auto-balancing structural behavior of the new RC frame structures with modified hybrid joints, as well as the self-healing grout proprieties which determine the closure of the remaining micro cracks after a seismic type or other accidental loading as well as the sustainable aspects of the use of such structures.

Keywords: modified special hybrid joint, seismic type test, self-healing advanced
cementitious compound