Assessment of the tensile behaviour of post-installed screw anchors in early age concrete. (9th May 2022)

• Record Type: Journal Article
• Authors: Obayes, Osamah; Gad, Emad; Pokharel, Tilak; Lee, Jessey; Abdouka, Kamiran
• Is Part Of: Construction & building materials. Volume 331(2022)
• Publication Date: 2022-05-09
• Subjects: Post-installed anchors -- Fasteners -- Screw anchors -- Early-age concrete -- CC method; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2022.127350
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Tensile behaviour of post-installed screw anchors in early age concrete. Application of the CC method equation to screw anchors in early age concrete. Effect of early age installation of screw anchors on the 28 days performance. Finite element analysis of post-installed screw anchors. Concrete cone failure and pull-out failure of post-installed screw anchors. Abstract: This study investigates the tensile behaviour of post-installed screw anchors in early-age concrete. The investigation included an experimental study including testing of 38 screw anchors at 6 different hydration ages. The experimental program aimed to investigate: (i) the effect of early-age installation on the 28 day behaviour; (ii) and performance when screw anchors are installed and tested in early-age concrete. The experimental results demonstrated the capability of the concrete capacity method model in capturing the behaviour of screw anchors in early-age concrete with reasonable accuracy. Further, early-age installation of screw anchors did not impact the performance of the anchors when tested in tension at 28 days. This study also included a detailed finite element analysis of screw anchors in early-age concrete to further understand the behaviour of this type of anchors and the failure mechanism governing the capacity under pure tension loading.