| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 311907 | Tunnelling and Underground Space Technology | 2011 | 7 Pages |
Understanding the early-age properties of fibre reinforced shotcrete (FRS) is critical to the accurate estimation of the time to safe re-entry under freshly sprayed FRS linings. Previous research in the field has indicated that shear failures dominate early-age load resistance and thereby govern the performance of a lining during the first few hours after spraying. This investigation has examined the influence of several geometric variables on shear resistance in a punching mode of failure. In particular, the research has addressed the influence of the size, shape, eccentricity, and inclination of punching loads on the apparent shear strength of an early-age fibre reinforced shotcrete (FRS) lining.
► Experimental assessment of early-age shear strength in FRS. ► Examined influence of size, shape, eccentricity, and inclination of load. ► The shape and inclination of the load did not influence shear strength. ► The size and eccentricity of loading zone both influenced capacity. ► An equation was developed to predict influence of geometric factors at early ages.
