| Mechanics and Mechanical Engineering |
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| Moment transfer factors for column-supported cast-in-situ hollow core slabs |
| Hai-tao Li, Andrew John Deeks, Li-xin Liu, Dong-sheng Huang, Xiao-zu Su |
| Department of Building Engineering, Nanjing Forestry University, Nanjing 210037, China; Faculty of Science, Durham University, Durham, DH1 3LE, England; Department of Civil Engineering, Zhengzhou University, Zhengzhou 450002, China; Department of Building Engineering, Tongji University, Shanghai 200092, China |
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Abstract Hollow core slabs are becoming of increasing interest as the construction industry attempts to minimise the impact of its activities on the environment. By forming voids in the interior of a concrete slab, the amount of concrete used can be reduced without significantly altering the capacity of the structure. In this study, we examined the inner force transfer mechanism of a column-supported cast-in-situ hollow core slab using finite element analysis. Both a hollow core slab and the corresponding solid slab were analysed using ANSYS and the results were compared. The orientation of the tube fillers causes the stiffness of the hollow slab to be orthotropic, potentially changing the distribution of load carried in the two orthogonal directions. Both the cross-section’s moments in the column strip and near the columns in the hollow core slab become larger than that in the solid floor. As well, the cross-section’s stiffness along the tube arrangement direction is larger than that of the radial cross-section, which causes the direction along the hole of the hollow core slab to carry more moment than the radial direction. The conversion factors of the two directions are proposed from the comparison for four typical areas of the hollow core slab, as are the moment distribution coefficients.
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Received: 22 June 2011
Published: 27 February 2012
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