Browsing by Subject "hollow-core"

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    Embedded Plate Connection Between Hollow-Core Slabs and Concrete Walls
    (2023-08) Jackman, Kal
    In current practice, hollow-core slabs are connected to the top of cast-in-place walls using dowel or welded connections. The existing research on these connections is minimal, and their design capacity is limited, which created the need for a new connection that has a more efficient installation and an increased design capacity. This research project investigated a new slab-to-wall connection that consisted of an embedded steel plate and stud in the hollow-core. The capacity of the plate assembly embedded in a hollow-core slab was established by directly loading the assembly until steel or concrete failure. Proof-of-concept subassembly testing was conducted on hollow-core slabs connected to cast-in-place walls; the setup mimicked assembly at a jobsite. Capacity of the subassembly was established by applying load until the hollow-core slab, wall, or anchor failed. Results indicated that the embedded steel plate plus stud connection had a capacity that ranged from 8.6 to 33.5 kips when load was applied in various directions. The subassembly results indicated that the wall typically failed first, when subjected to applied loads that ranged from 2.5 to 19.8 kips. These results indicated that the proposed embedded steel plate and stud connection was robust enough for use in real-world applications.
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    Variation In Web-Shear Capacity of Hollow-Core Slabs With Filled Cores
    (2020-06) Asperheim, Scott
    The web-shear capacity of hollow-core slabs both with and without concrete or grout core-fill material, as well as slabs that were cast with a solid extruded core (i.e., with one of the voids omitted), was experimentally investigated using two different hollow-core slab geometries to evaluate how the fill material affected the shear capacity. The shear demand at failure was compared to five different methods of predicting the shear capacity of hollow-core slabs: ACI 318 (2014), the AASHTO (2017) sectional design model, a method proposed by Lin Yang (1994), the EN 1168 (2011) general method, and the EN 1168 (2011) simplified method. Additionally, a web-shear capacity prediction method was proposed based on the ACI-ASCE Committee 326 (1962) report on shear and diagonal tension.