Williams Hollow Core/Grouted Anchors
Williams Hollow Core/Grouted Anchors
(OP)
I am looking for any additional design aides/references for Williams Hollow Core Rock Anchors. The application is specified by an owner/consulting engineer to be used in existing concrete. Williams seems to refer to ACI 349 and stay away from 318 Appendix D.
Specifically, for a grouted anchor there is typically a bonded length and free stress length...if the contractor plans on grouting initially full depth where would you assume the shear cone development begins, if grouted full depth would you assume it begins at the embeddeded tip of the anchor? Also, the information from Williams is clear for tensile loadings, however, besides the steel strength, how do you determine the shear strength? Some old PCI design guides from 1979 limit the shear allowable for concrete failure based on the breakout cone.
Specifically, for a grouted anchor there is typically a bonded length and free stress length...if the contractor plans on grouting initially full depth where would you assume the shear cone development begins, if grouted full depth would you assume it begins at the embeddeded tip of the anchor? Also, the information from Williams is clear for tensile loadings, however, besides the steel strength, how do you determine the shear strength? Some old PCI design guides from 1979 limit the shear allowable for concrete failure based on the breakout cone.






RE: Williams Hollow Core/Grouted Anchors
RE: Williams Hollow Core/Grouted Anchors
ACI really doesn't apply here--your geotechnical engineer or Williams should be able to answer your questions.
DaveAtkins
RE: Williams Hollow Core/Grouted Anchors
RE: Williams Hollow Core/Grouted Anchors
Why would the consulting engineer specify a rock anchor for concrete? Any chance of submitting a more reasonable anchoring system such as epoxy?
RE: Williams Hollow Core/Grouted Anchors