Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Tightening Torque Influence on Pullout Behavior of Post-installed Expansion Anchors
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 influence of the tightening torque and the anchorage depth on the pullout performances of torque-controlled expansion anchors. The diameter d of the tested anchors was 10 mm. Six configurations were tested on 18 concrete blocks. Three pre-tension loads and two anchorage depths were considered. The results show that the fastening torque has no influence on the load-bearing capacity far away from the edges. However, an increase of the torque leads to a decrease of the anchor’s slipping during pullout tests. Nevertheless, applying an excessive fastening torque may lead to a steel-rupture of the anchor during the fastening phase. An increase of the anchorage depth leads to a better load capacity of the anchor and reduces the risk of concrete cone rupture. Finally, a simplified model of the tension response of the anchor with a bilinear load-displacement relationship has been suggested.
Tightening Torque Influence on Pullout Behavior of Post-installed Expansion Anchors
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 influence of the tightening torque and the anchorage depth on the pullout performances of torque-controlled expansion anchors. The diameter d of the tested anchors was 10 mm. Six configurations were tested on 18 concrete blocks. Three pre-tension loads and two anchorage depths were considered. The results show that the fastening torque has no influence on the load-bearing capacity far away from the edges. However, an increase of the torque leads to a decrease of the anchor’s slipping during pullout tests. Nevertheless, applying an excessive fastening torque may lead to a steel-rupture of the anchor during the fastening phase. An increase of the anchorage depth leads to a better load capacity of the anchor and reduces the risk of concrete cone rupture. Finally, a simplified model of the tension response of the anchor with a bilinear load-displacement relationship has been suggested.
Tightening Torque Influence on Pullout Behavior of Post-installed Expansion Anchors
Delhomme, Fabien (Autor:in) / Pallud, Bertrand (Autor:in) / Rouane, Nicolas (Autor:in)
2018
Aufsatz (Zeitschrift)
Englisch
creep , pullout test , anchor , concrete , prestress
BKL:
55.80
Verkehrswesen, Transportwesen: Allgemeines, Verkehrswesen, Transportwesen: Allgemeines
/
74.75
Verkehrsplanung, Verkehrspolitik, Verkehrsplanung, Verkehrspolitik
/
55.80
Verkehrswesen, Transportwesen: Allgemeines
/
56.24
Straßenbau, Straßenbau
/
56.24
Straßenbau
/
74.75
Verkehrsplanung, Verkehrspolitik
Tightening Torque Influence on Pullout Behavior of Post-installed Expansion Anchors
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