An innovative reinforced damp proof course, the RCW seismic dissipator, is hereby proposed. An application has been performed in a masonry building for council housing estate with 42 flats. It consists of a course between foundation and ground floor made by 3-4 mm glued foil overlapped by 60 mm layer of weak mortar, reinforced by several couples of vertical steel bars. In case of low seismic actions, the RCW ensures a connection between basement and ground floor; in case of strong motions, the damage of weak mortar layer allows relative displacements dissipating energy by friction mechanism, while vertical steel bars furnish elastic restoring force to lead back the building to the initial position after the earthquake. Tests are performed on two couple of specimens (40×60×30 cm) through series of quasi-static time histories with increasing intensity: high-strength tensioned tendons simulate vertical loads applying different compression levels to the RCW. Trials showed the self-centering performance of the RCW and the wide hysteretic behaviour. The increase of seismic performance to the buildings obtained by the RCW has been evaluated by way of numerical models: the results are presented in terms of behaviour factor q.
AN APPLICATION OF THE RCW SEISMIC DISSIPATOR ON MASONRY BUILDINGS: ON-SITE TESTING AND STRUCTURAL ANALYSIS
SASSU, MAURO
2013-01-01
Abstract
An innovative reinforced damp proof course, the RCW seismic dissipator, is hereby proposed. An application has been performed in a masonry building for council housing estate with 42 flats. It consists of a course between foundation and ground floor made by 3-4 mm glued foil overlapped by 60 mm layer of weak mortar, reinforced by several couples of vertical steel bars. In case of low seismic actions, the RCW ensures a connection between basement and ground floor; in case of strong motions, the damage of weak mortar layer allows relative displacements dissipating energy by friction mechanism, while vertical steel bars furnish elastic restoring force to lead back the building to the initial position after the earthquake. Tests are performed on two couple of specimens (40×60×30 cm) through series of quasi-static time histories with increasing intensity: high-strength tensioned tendons simulate vertical loads applying different compression levels to the RCW. Trials showed the self-centering performance of the RCW and the wide hysteretic behaviour. The increase of seismic performance to the buildings obtained by the RCW has been evaluated by way of numerical models: the results are presented in terms of behaviour factor q.
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