Evaluation of Web Shear Design Procedures for Precast Prestressed Hollow Core Slabs

Precast, prestressed hollow core slabs (HCS) are commonly used by the construction industry for floor and roof systems worldwide. Generally, web shear strength governs design of such members. This is because width resisting stresses relatively small prestressing force at bottom restrains flexural cracking. Although most available codes follow Mohr’s circle stress estimating cracking capacity HCS, they produce different scattered predictions. paper gives more insight into provisions HCS in five codes. These include ACI 318, Eurocode 2, European standard EN 1168, CSA-A23.3, AASHTO LRFD specifications. A set 229 data points was established from experimental investigations literature on that failed shear. The dataset evaluating methods results analysis indicated both simplified method 318-19 produced very conservative In contrast, 2 unconservative predictions specimens dataset, whereas 318-05 gave deeper sections. On other hand, reasonable were obtained 1168 while CSA-A23.3 provided better Proposed modifications presented improving HCS.