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原文传递 Behavior of Laterally Loaded Piles Supporting Bridge Abutments - Phase 2.

题名：	Behavior of Laterally Loaded Piles Supporting Bridge Abutments - Phase 2.
作者：	burdette, e. g. deatherage, j. h. goodpasture, d. w.
关键词：	tests
摘要：	Tests were performed over approximately a three-year period to investigate the behavior of integral abutments supported by prestressed concrete piles. Four abutments were tested. The piles were embedded 12 in. into a 36 in. wide concrete abutment. A slab was cast on top of the abutment to provide ballast, to provide a way to apply lateral load to the system, and to provide a way to restrain the system as lateral load was applied. Restraint was provided by hold-down arms to assure that there was a reversal of moment in the pile at a relatively shallow depth, consistent with restraint expected to occur in a typical highway bridge with integral abutments. The basic test regimen consisted of three tests to 0.5 in. and three tests to 1.0 in. in each direction at a rate of testing of approximately 1.0 in. in 4 hours. After the basic test regimen was completed, other more stringent tests were performed at a much faster rate of loading. The abutments in these tests remained essentially undamaged throughout the entire range of testing. In the tests of abutments on steel piles, the abutments themselves limited the amount of horizontal displacement that the system could tolerate without loss of integrity. In the tests of abutments on prestressed concrete piles, the amount of horizontal displacement was limited by the piles. The results of the research on prestressed concrete piles supporting integral abutments led to the unequivocal conclusion that such piles are appropriate for use in integral abutment bridges. The results also indicate that TDOTs design criterion which allows 1.0 in. horizontal displacement in each direction is conservative. While no specific recommendation of maximum allowable displacement was formulated through the research, a value of displacement of as much as 1.5 in. would appear to be reasonable. / NOTE: Final rept. / Supplementary Notes: See also PB2000-106711. Sponsored by Tennessee State Dept. of Transportation, Nashville. and Federal Highway Administration, Nashville, TN. Tennessee Div. / 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.
总页数：	u0722；61p
报告类型：	科技报告