Tensile Behavior of Groups of Double-Headed Anchored Blind Bolts within Concrete-Filled Square Hollow Sections under Cyclic Loading

Abstract

In this paper, the cyclic behavior of groups of double-headed anchored blind bolts (DHABBs), which are anchored within concrete-filled square hollow sections (CFSHSs), is investigated. The DHABB used in this study consists of a conventional headed anchored blind bolt (HABB) with one additional head, between the existing end head in the embedded region and head next to the tube wall. A series of full-scale experiments were conducted on the pull-out behavior of groups of DHABBs under cyclic loading. The specimens consisted of groups of two DHABBs, four DHABBs, and four DHABBs with one through bolt (TB). The effects of load distribution between individual bolts and of internal concrete cones ov..