الفهرس 
Shear in the Uncracked Concrete zoneOnly 14 pages are availabe for public view
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Abstract
Precast hollow core slabs (PHCS) are widely used in civil construction, typically as floor or roof in office and residential buildings as well as parking structures. Due to fabrication restraints, no shear reinforcement can be provided, and shear resistance of PHC slabs relies solely on the shear strength of concrete itself. In some cases, the slab could be subjected to a concentrated load or line load caused by moving vehicles and cargos. Thus, shear failure is likely to occur at the region close to supports. Traditional remedies include choosing thicker slabs and filling the voids of PHC slabs, which would inevitably increase selfweight and cost and thus lose the advantages of PHC slabs. Therefore, it is imperative to develop a new shear strengthening strategy for PHCS slabs which would not only effectively improve its shear capacity but also retain the original merits. The objective of the present work is to explore the feasibility and effectiveness of using precast thin internal UHP-SHCC tubes forming the internal slab voids while working as shear reinforcement. An experimental study has been conducted to investigate the shear behaviour of the innovated composite PHCS slab. According to test results CPHC show much better shear properties in terms of loadcarrying capacity, crack distribution, ductility, and damage tolerance compared with ordinary PHC