DESIGN OF CAST-IN-PLACE AND POST-INSTALLED CONCRETE ANCHORS SUBJECT TO SEISMIC FORCES  (IN ACCORDANCE WITH 2007 CBC / 2006 IBC / ACI 318-05)

Cast-in-place anchors into concrete that are subject to seismic design forces could, before the adoption of the IBC, be designed by the allowable stress design method or the strength design method of the UBC and the other two legacy codes. They must now be designed in accordance with the strength design method in Appendix D of ACI 318-05. This seminar provides an overview of the anchor design provisions in Appendix D of ACI 318-05, presents design examples, and points out some of the difficulties facing designers, particularly when it comes to seismic design of anchors.

The seminar illustrates the four different failure modes for an anchor subject to tension and the calculation of the corresponding anchor strengths through a design example. The related detailed provisions of Appendix D are introduced and discussed in the course of presenting the example.

The seminar also illustrates the three different failure modes for an anchor subject to shear and the calculation of the corresponding anchor strengths through continuation of the design example mentioned above. The related detailed provisions of Appendix D are introduced and discussed. The strength of an anchor or a group of anchors subject simultaneously to tension and shear is also discussed, as well as the prevention of splitting failure.

Post-installed anchors used to be outside the scope of anchor design provisions in legacy model codes. Post-installed mechanical anchors are included in the scope of ACI 318 Appendix D, and post-installed adhesive anchors are addressed in ICC-ES acceptance criteria that reference ACI 355.2.

The seminar will address the types of post-installed anchors addressed by the code and by the relevant ICC-ES acceptance criteria, as well as conditions not explicitly addressed by the code. The qualification of proprietary anchor types under ACI 355.2 is reviewed, and the use of data provided in ICC-ES Evaluation Service Reports in conjunction with the provisions of Appendix D is addressed. Design situations addressed include single anchors, anchor groups, anchors near edges, and special cases (sill plates).  

 

DATE	LOCATION	HOTEL
August 27, 2008	Portland	Holiday Inn Portland Airport 8439 NE Columbia Blvd. Portland, OR 97220 (503) 256-5000
August 28, 2008	Seattle	Red Lion Hotel Seattle Airport 18220 International Blvd. Seattle, WA  98188 (206) 246-5535
September 24, 2008	San Diego	Double Tree Club Hotel  1515 Hotel Circle South San Diego, CA 92108  (619) 881-6900

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