Load resistance and failure modes of GFRP composite strengthened hollow core slabs with openings

Behavior Of Structural Macrosynthetic Fiber-Reinforced Precast, Prestressed Hollow-Core Slabs at Different Flexure-to-Shear Ratios

“…Jain et al 16 and Srikar et al 17 evaluated the effect of steel fibers with different dosages on the strength of concrete and confirmed the increase in ductility in the compressive behavior of concrete. Previous studies by the authors of this paper [18][19][20][21] highlight the effect of a/d on the behavior of hollow-core slabs both with and without strengthening. The increase in strength was observed to depend on various factors, such as a/d and the compressive and tensile strengths of the concrete.…”

Efficient near surface mounting CFRP strengthening of pretensioned hollowcore slabs with opening – An experimental study

“…Previous research has confirmed that the NSM reinforcement improves the ultimate and yielding strength, as well as the post-cracking stiffness [1]. Some studies have also focused on strengthening of RC slabs using CFRP [12][13][14][15] and found similar trends in results as that of beams. The authors have previously found that openings significantly affect the behaviour of hollow core slabs [16] and suitable strengthening has to be carried out to reinstate the lass of load carrying capacity.…”

Shear Behavior of Prestressed Hollow Core One-Way Slabs with Openings: Experimental, Numerical, and Standard Formulation Verification

“…In buildings, hollow core slabs demand openings to accommodate mechanical and plumbing installations (i.e., shafts). However, structural openings, which impose the cut of strands, cause modifications on the load distribution along all slabs, creating a weak point in the structure [1,3,4].…”

“…In order to adhere to adequate structural demands with the presence of openings, hollow core designs already consider the structural openings and the industry rearranges the distribution of strands, adding strands along the remaining cross-section. However, during the lifespan of the hollow core slabs, sometimes it is necessary to create an opening not planned by a responsible engineer [2][3][4]9].…”