Friday, May 2, 2014

// // Leave a Comment

Punching Strength of Reinforced Concrete Footings

A total of 17 reinforced concrete footings were tested to investigate the punching shear behavior of footings. The test parameters investigated are the shear span-depth ratio (a/d), concretestrength, and punching shear reinforcement. The (a/d) ranged between 1.25 and 2.0, whereas the concrete strength rangedbetween 20 and 40 MPa (2.9 and 5.8 ksi). To study the effect ofsoil-structure interaction, five footings were realistically supported on sand. The remaining specimens were supported on a column stub and a uniform surface load was applied. The present experimental investigations indicated that the angle of the failure shear crack issteeper in punching tests on compact footings than observed intests on more slender slabs. Furthermore, the (a/d) significantly affects the punching shear capacity. Based on the test results, the ACI and Eurocode 2 provisions are critically reviewed and improvements are proposed. 


Punching Strength of Reinforced Concrete Footings


Post a Comment