The Influence of Gravity Shear Ratio on the Behaviour of Reinforced Concrete Slab-Column Connections with Shear Reinforcement

摘要

A numerical analysis has been undertaken to study the behaviour of slab-column connections under high gravity shear ratio. A half-scale reinforced concrete slab-column connection with shear reinforcement was modelled in finite element (FE) tool called ABAQUS. The specimen was subjected to combined constant gravity and reversed cyclic lateral load. Prior to executing the numerical modelling of the specimen, one specimen following the model similar to the previous study was first modelled as a means of verification purpose. Upon this phase, further analysis was then performed by merely modifying the magnitude of gravity shear ratio being applied to the specimen with the value of 0.4 specified as the maximum allowable gravity shear ratio for slab-column connection. In addition, the cyclic lateral load was then given afterwards using displacement control method. It is shown that the influence of high gravity shear ratio clearly reduces the lateral drift capacity. The result also resembles the trend of drift capacity versus gravity shear ratio when being compared to the drift limits from the design specification and prior studies.