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原文传递 Axial Force Transfer Mechanisms Within Cast-In-Steel-Shell Piles.

题名：	Axial Force Transfer Mechanisms Within Cast-In-Steel-Shell Piles.
作者：	gebman, m. ashford, s. restrepo, j.
关键词：	compression, tension, reinforced concrete
摘要：	In this research, the axial force transfer within Cast-In-Steel-Shell (CISS) piles through the surface bond and through mechanisms fixed to the steel shell internal surface was studied. Mechanisms studied included a shear ring, welded bar, weld bead, shear studs, cross bar, and tread plate. Other parameters studied in this experiment included the effect of shear ring spacing, the effect of the D/t ratio on the shear ring, and the effects of expansive concrete, D/t ratio, and surface condition. Test units were subjected to a quasi-static reversed cyclic axial loading. All mechanisms exhibited a noticeable increase in the axial force capacity, in both compression and tension. Test units with a circumferential mechanism (e.g. shear ring) had a ductile performance, whereas distributed mechanisms had a non-ductile performance. Circumferential mechanisms were effective to the extent that either the steel shell capacity was obtained, through circumferential yielding at the mechanism, or the reinforced concrete core capacity was obtained. This report will present the experimental results, a prediction method and results from finite element modeling. / NOTE: Final rept., 01 Jul 2002-30 Jun 2006. / Supplementary Notes: Prepared in cooperation with the State of California Department of Transportation. / Availability Note: Available on CD-ROM and in color paper copy only. 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.
总页数：	u0725；362p
报告类型：	科技报告