Ambient- and oven-cured geopolymer concretes under active confinement

Abstract In the present paper, we analyzed the main advantages of the active confinement techniques with a particular focus on the CAM system, which is an Italian reinforcement technique with pre-tensioned stainless steel ribbons. Italian seismic codes classify the CAM system as belonging to the strengthening category of “horizontal and vertical ties”. Therefore, we compared the CAM system to the reinforcement techniques with horizontal and vertical ties in order to understand the actual similarities and possible differences between them. Moreover, we offered a deep analysis of the main critical issues of the CAM system, distinguishing between geometrical and mechanical weak-points. In particular, we analyzed the strengthening mechanism of the CAM system, still poorly understood, by performing a static analysis in the Mohr/Coulomb plane. Finally, we provided suggestions for future developments.

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MECHANISM OF ACTIVE CONFINEMENT BY LATERAL PRESTRESS AND ITS INFLUENCE ON REINFORCED CONCRETE COLUMNS SUBJECTED TO FLEXURE AND AXIAL LOAD

Journal of Structural and Construction Engineering (Transactions of AIJ) ◽

10.3130/aijs.67.177_2 ◽

2002 ◽

Vol 67 (561) ◽

pp. 177-184

Author(s):

Hiroshi WATANABE ◽

Morio MINEMURA ◽

Keiichi KATORI ◽

Shizuo HAYASHI

Keyword(s):

Reinforced Concrete ◽

Axial Load ◽

Concrete Columns ◽

Reinforced Concrete Columns ◽

Active Confinement

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ANTICORONAVIRUS DISASTER DRAWER: CHALLENGES TO KEEP THE MIND ACTIVE. CONFINEMENT GAMES

EDULEARN21 Proceedings ◽

10.21125/edulearn.2021.0536 ◽

2021 ◽

Author(s):

Mari Carmen García-Domene ◽

Jose Juan Esteve-Taboada ◽

María Amparo Díez-Ajenjo ◽

María José Luque ◽

Susana Ortí-Navarro

Keyword(s):

Active Confinement ◽

The Mind

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Design of the Seismic Upgrading of the Tambour of the S. Nicolò’s Church in Catania with the DIS-CAM System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.133-134.947 ◽

2010 ◽

Vol 133-134 ◽

pp. 947-952 ◽

Cited By ~ 4

Author(s):

M. Di Croce ◽

Felice C. Ponzo ◽

Mauro Dolce

Keyword(s):

Elastic Limit ◽

Seismic Vulnerability ◽

High Stress ◽

Numerical Analyses ◽

Masonry Buildings ◽

Active Confinement ◽

Low Strength ◽

Seismic Forces

The high seismic vulnerability of several monumental masonry buildings can be ascribed to the low strength of the materials employed, to the presence of wide openings and slender panels and to the high stress due to both vertical and horizontal seismic forces. A new upgrading system, named DIS-CAM (DISsipative Active Confinement of Masonry) was proposed to design the seismic upgrading of the tambour of the dome of the S. Nicolò’s church in Catania (Italy). The technique, that can be considered reversible and a not invasive, is based on a rocking-damper system, in which the rocking and the re-centring capacity are provided by the behaviour of masonry panels, while the dissipation capacity is mainly relied upon hysteretic elements stressed in flexure beyond their elastic limit. In this paper, the design of the scaled model’s seismic upgrading is presented and the main outcomes of preliminary numerical analyses carried out on the tambour, without any reinforcement and retrofitted with the DIS-CAM system, are discussed.

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