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Title: A Two-Phase Approach to the Prediction of the Punching Strength of Slabs

Author(s): Adrian E. Long

Publication: Journal Proceedings

Volume: 72

Issue: 2

Appears on pages(s): 37-45

Keywords: columns (supports); concrete slabs; failure;flexural strength;punching shear; reinforced concrete;shear strength; slabs;statistical analysis;structural analysis; structural design.

Date: 2/1/1975

By simplyfying reported analytical procedures, which take into consideration the interaction of flexural and shear effects, formulas have been derived for predicting the punching capacity of slabs at interior columns. These formulas are at present limited in application to istropically reinforced square slabs which are supported on square columns. However, because of their analytical bases, their extension to slabs with various properties and boundary conditions should be readily facilatated. Application to revelent test results reportes in the liturature indicates that the formulas respresent a significant improvement over previous methods which are largely empiracally based. In addition when compared to present code methods the proposed procedure is much more consistant and accurate.


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