Prestress Load Influence on Pull-out Behaviour of Post- installed Torque- controlled Expansion Anchors

Author(s): Rouane N., Salomon P., Pallud B. and Delhomme F
Paper category: Proceedings
Book title: Proceedings of International Conferences (ICACMS) Advances in Construction Materials and systems Vol 2
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-194-0
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 312-321
Total Pages: 10
Language : English

Abstract: Post-installed anchors in reinforced concrete structures are increasingly important in current constructions especially in repair or upgrading works. A research program was completed to determine the tightening torque and anchorage depth influence on the pull-out performances of torque-controlled expansion anchors. The anchor diameter d was 10 mm. Six configurations were tested on 18 concrete blocks. Three pre-tension loads and two anchorage depths were considered. The results show the fastening torque has no influence on the load-bearing capacity of anchors far away from the concrete edge. However, an increase of the torque leads to a decrease of the anchor’s slipping during pull-out tests. Nevertheless, applying an excessive fastening torque may lead to a steel-rupture of the anchor during the fastening phase and premature splitting in case of anchors close to an edge. An embedment increase leads to a better anchor load capacity and reduces the concrete cone rupture risk. Finally, a simplified model of the anchor tension response with a bilinear load-displacement relationship was suggested.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00