Abstract:To study the bond anchoring performance of full-thread high strength bolts, pull-out tests were carried out on forty-eight specimens in twenty-four groups, where the influential factors on bond anchorage capacity were considered, including the bolt type, bolt diameter d, the anchorage length la and the thickness of concrete cover c. The results show that the anchorage performance of straight high strength anchor bolts was lower than that of with head ones. The bond stress of straight high strength anchor bolt was mainly concentrated on the contact area within the anchorage length 10d. Its bonding performance increases with the thickness of concrete cover. However, increasing the anchorage length will reduce the influence of the thickness of concrete cover on the bonding property. The energy translation and dissipation of high strength anchor bolt under tension are influenced by the concrete failure pattern and anchorage length. Moreover, the calculation formula in the design codes provide over-conservative estimation for the critical anchorage length of anchor bolts.