what is the effect of grout in the anchor assembly's performance?
Shear load acting on anchors installed with standoff creates bending in the anchors. Other than for a grouted standoff, ACI 318 anchoring-to-concrete provisions do not consider anchor bending with respect to standoff conditions; however, bending could be a controlling shear failure mode. Provisions for considering anchor bending are given in European publications such as a European Technical Approval Guideline (ETAG) published by the European Organization for Technical Approvals (EOTA). ETAG 001 Metal Anchors for Use in Concrete Annex C: Design Methods for Anchorages includes provisions for calculating a shear resistance (strength) that results from internal anchor bending. PROFIS Engineering uses the ETAG 001 Annex C provisions to consider bolt bending as a possible shear failure mode. These provisions can be summarized as follows:
