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Tuesday, June 1 • 14:25 - 14:50
CL RESTRAP - Active shear strengthening of concrete

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• Most effective shear strengthening method due to the enclosure of tension and compression cord
• Various experimental studies verify the shift from brittle shear failure to ductile flexural failure after the application of CL RESTRAP
• All four contributing factors to the shear capacity of a concrete structure are enhanced using carbon fibre solutions



One promising means of increasing the capacity of existing shear-deficient beams is to strengthen the structure using external prestressed carbon fibre CL RESTRAP’s. In this system, layers of CFRP tape are wrapped around a beam to form a strap which acts like a discrete unbonded vertical prestressing tendon. Various experimental programs have been undertaken to investigate the influence of the strap spacing, stiffness, initial prestress level and/or any pre-existing damage on the strengthened behaviour and mode of failure.
A standard concrete control beam was tested and failed in shear. In contrast, all of the beams strengthened with carbon fibre CL RESTRAP showed a significant increase in their ultimate load capacity with several of the strengthened beams failing in flexure.
Large scale applications have been carried out in 2019 in a commercial project in Switzerland using around 1’200 pretensioned CL RESTRAP’s.

Speakers, Jury Members & Final...
avatar for Andreas WINISTOERFER

Andreas WINISTOERFER

CEO, Carbo-Link AG
Dr Andreas Winistoerfer is the founding partner and CEO of Carbo-Link AG, based just outside of Zurich, Switzerland.He studied MSc. Materials Science at Cranfield University, England before completing his PhD in Engineering at the World-renowned ETH University in Zurich, Switzerland... Read More →


Tuesday June 1, 2021 14:25 - 14:50 CEST
Conferences (Hall 6 - Room 611)