PROPOSED MATHEMATICAL EQUATION FOR EVALUATING THE RESIDUAL PUNCHING SHEAR CAPACITY OF HIGH-PERFORMANCE CONCRETE SLABS AFTER BEING SUBJECTED TO IMPACT LOADING

Year 2026, Volume: 16 Issue: 2, 296 - 304, 03.02.2026

Ali Adnan Al-Zahid

Abstract

The research investigates the validity of high-performance concrete slabs under punching shear after they are exposed to impact load. The importance of this study lies in opening new avenues for researchers regarding slabs subjected to impact loading, specifically addressing whether they can be repaired and strengthened or are more likely to require reconstruction. The
experimental program consists of eight slabs with different parameters tested under the same impact loading, and then the punching shear capacity is evaluated. One of these slabs was reinforced by traditional reinforcement, while the other specimens discussed different techniques designed to find alternative modified methods to resist punching shear. Finally, the suggested empirical formula predicts the value of punching shear for high-performance concrete slabs that suffer from impact load. The accuracy of the suggested equation reached 90.5 % from experimental results.

Keywords

residual capacity , punching shear , impact load , high-performance concrete , empirical equation

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