Steel frames with reinforced concrete infill wall (SRCW) are characterized by an high stiffness that minimize the inter-storey drift and the associated damage to non-structural elements. They are however characterized by critical drawbacks, that limit their use, such as the low dissipative capacity of the concrete wall that causes high seismic force and high over-turning moment at the wall base foundation. Within the present study, an innovative steel frame with reinforced concrete infill shear wall system is proposed. It consists of a reinforced concrete infill walls surrounded by a steel frame which contains energy dissipation replacea-ble elements within the columns. In this way the force transmitted to the other structural ele-ments, and in particular to the foundations, are limited and an important portion of the seismic energy dissipated through plastic deformation. Within this paper the behaviour of the proposed system is investigated through nonlinear analyses based on advanced models sup-ported by the experimental results on real scale specimens, highlighting advantages and drawbacks of the system.
NONLINEAR ANALYSIS AND EXPERIMENTAL BEHAVIOUR OF AN INNOVATIVE STEEL FRAME WITH REINFORCED CONCRETE INFILL WALLS
MORELLI, FRANCESCO;SALVATORE, WALTER;
2016-01-01
Abstract
Steel frames with reinforced concrete infill wall (SRCW) are characterized by an high stiffness that minimize the inter-storey drift and the associated damage to non-structural elements. They are however characterized by critical drawbacks, that limit their use, such as the low dissipative capacity of the concrete wall that causes high seismic force and high over-turning moment at the wall base foundation. Within the present study, an innovative steel frame with reinforced concrete infill shear wall system is proposed. It consists of a reinforced concrete infill walls surrounded by a steel frame which contains energy dissipation replacea-ble elements within the columns. In this way the force transmitted to the other structural ele-ments, and in particular to the foundations, are limited and an important portion of the seismic energy dissipated through plastic deformation. Within this paper the behaviour of the proposed system is investigated through nonlinear analyses based on advanced models sup-ported by the experimental results on real scale specimens, highlighting advantages and drawbacks of the system.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
