Bond Mechanical Properties of Glass Fiber Reinforced Polymer Anti-Floating Anchor in Concrete Baseplate

Abstract

Combined with fiber Bragg grating (FBG) sensing technology, four glass fiber reinforced polymer (GFRP) anti-floating anchors and four steel anti-floating anchors were tested for on-site destructive failure to investigate the anchoring performance and the bonding characteristics between GFRP anti-floating anchor and concrete floor. The test results show that bending GFRP anchor will be broken at the common boundary between vertical anchorage section and bending section during the pullout process, and the spring-back load provided by the rupture contributes to a decrease of bearing capacity and an inflection point on the load-slip curve. The load-displacement curve of the straight anchor GFRP anti-floating anchor is smoother and has better predictability than the same type of steel anchor. Additionally, different forms of GFRP anti-floating bolt have different bond-slip constitutive relations. By introducing the sliding-slip correction factor of bending bolt, constitutive models describing the rising-section of sliding-slip relation of bending and straight-anchored GFRP anti-floating bolt are established respectively. The model can fit the test results rightly.