原文传递
Shear capacity of hollow-core slabs with concrete-filled cores
| 题名： | Shear capacity of hollow-core slabs with concrete-filled cores |
| 正文语种： | 英文 |
| 作者： | Matthew R. McDermott;Benjamin Z. Dymond |
| 作者单位： | University of Minnesota |
| 关键词： | Core fill concrete;crack angle;fiber-reinforced;hollow-core slab;shear capacity;web shear;welded-wire reinforcement |
| 摘要： | Precast concrete manufacturers frequently enhance the shear capacity of hollow-core slabs by filling one or more of the cores with concrete in regions where the shear demand exceeds the slab capacity. Although routinely implemented, the core-fill web-shear performance has not been thoroughly studied and can be ambiguous in design. Sixteen experimental web-shear tests were performed on eight 12 in. (304.8 mm) deep hollow-core slabs, each slab tested twice, to investigate how a concrete-filled core augmented the web-shear capacity of the hollow-core slab. Core-fill material was added both immediately following extrusion and following detensioning to consider core-fill timing in regard to web-shear strength. In addition, several core-fill enhancement strategies were implemented and tested to investigate practical methods to potentially improve the core-fill web-shear strength. None of the core-fill enhancement strategies definitively demonstrated an improvement in web-shear capacity beyond the typical core-filled specimen. Rather, bond between the core-fill concrete and hollow-core-slab concrete appeared to be the most important factor for core-fill web-shear strength. |
| 出版日期： | 2020.02-04 |
| 出版年： | 2020 |
| 期刊名称： | PCI-Prestressed Concrete Institute Journal |
| 卷： | Vol.61 |
| 期： | No.02 |
| 页码： | 59-74 |
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