Abstract
Punching shear tests of geometrically similar reinforced concrete slabs of different sizes are carried out. The nominal shear stress at failure is not constant, as assumed in the current design formulas, but decreases as the slab size increases. The observed size effect in punching shear strength is approximately described by an improved design formula which uses the size-effect law for brittle failures due to distributed cracking. Applicability of this law is further supported by measurements of deflection diagrams, which revealed that the post-peak load decline becomes steeper as the slab size increases. Previous test data by various investigators are also analyzed collectively as one large set.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 44-53 |
| Number of pages | 10 |
| Journal | ACI Structural Journal |
| Volume | 84 |
| Issue number | 1 |
| State | Published - Jan 1987 |
ASJC Scopus subject areas
- Building and Construction
- Civil and Structural Engineering