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Factors affecting web-shear capacity of hollow-core slabs with filled cores
| 题名： | Factors affecting web-shear capacity of hollow-core slabs with filled cores |
| 正文语种： | eng |
| 作者： | Asperheim, Scott A.;Dymond, Benjamin Z. |
| 作者单位： | US Air Force Washington DC 20330 USA;Univ Minnesota Duluth Civil Engn Dept Duluth MN USA|Univ Minnesota Duluth Resilient Precast Concrete Certificate Program Duluth MN USA |
| 关键词： | ACI 318;bond;core fill;EN 1168;hollow-core slab;moment demand;roughened surface;shear capacity;shear stress;web shear |
| 摘要： | Since the 1970s, hollow-core slab manufacturers have filled voids with concrete to increase shear capacity, but limited research into the efficacy of this practice has been completed. Forty tests were performed on 20 hollow-core slabs that were 12 in. (300 mm) deep to quantify the variation in web-shear capacity that can be gained. The 20 slabs had either no core fill, cores filled with concrete or grout, or one void omitted during fabrication. Two different cross sections were investigated, a heavy-duty slab with thick webs and noncircular voids and a slab with narrow webs and circular voids. The results indicated that adequate composite action between the core-fill material and extruded slab was necessary to realize web-shear capacity gains. In addition, the prestressing strand jacking stress, concrete compressive strength at transfer, transfer length, and moment demand can have a large effect on the web-shear capacity of a hollow-core slab. |
| 出版年： | 2021 |
| 期刊名称： | PCI Journal |
| 卷： | 66 |
| 期： | 4 |
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