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原文传递 Anchor Embedment Requirements for Signal/Sign Structures.

题名：	Anchor Embedment Requirements for Signal/Sign Structures.
作者：	cook, r. a. halcovage, k. m.
关键词：	anchor embedment requirements,signal/sign structures/hurricane season 2004, cantilever sign structures, failures, site investigations, testing, shear load, guidelines/
摘要：	During the 2004 hurricane season, several anchor embedment failures of the foundations of cantilever sign structures occurred. The purpose of the research program was to determine the cause of the failure of those foundations. After a literature review, in conjunction with site investigation, and testing, it was determined that the failure originated from the shear load on the anchors directed parallel to the edge of the foundation. The shear load resulted from the torsion loading on the anchor group that occurred during the hurricane. Investigation of this failure mode, based on the ACI 318-05 Appendix D provisions for concrete breakout of anchors, indicated that this is a failure mode not considered in the current design procedures for these types of foundations. The results of testing led to the development of guidelines for the evaluation and repair/retrofit of existing foundations. Alternative foundations were also presented for future consideration. / NOTE: Final rept. / Supplementary Notes: Sponsored by Florida State Dept. of Transportation, Tallahassee. Research Management Center. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
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