Anchor Behavior of One-Side Bolt with Flip-Top Collapsible Washer

With the development of blind bolts that can be installed from outer side a section, application steel pipe hollow sections in prefabricated structures has become possible. The novel one-side bolt with flip-top collapsible washer (FTW-OSB) is proposed, which fold at end to achieve simple and efficient installation. Firstly, components installation process FTW-OSB are introduced. Additionally, axial tensile tests were carried out on three types new bolts, failure mode, load–displacement curve, ultimate capacity analyzed. Based this, finite element model was verified, through series parameter analyses, influence size construction, friction coefficient, contact surface analyzed optimized. results show L-shaped prevent rotation better anchoring performance than I-shaped washer. thickness, height, upper key factors affecting bolt. Among these factors, when thickness increases 0.1 d0 0.3 d0, initial stiffness increase by 136.5% 100.3%, respectively. lower coefficient ignored. mainly shear tension failure. By effectively adjusting wall size, avoided an achieved same as type 10.9-grade ordinary high-strength