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原文传递 Seismic Testing of Precast Segmental Bridges Phase III: Bridge System Test.

题名：	Seismic Testing of Precast Segmental Bridges Phase III: Bridge System Test.
作者：	burnell, k. p. magally, s. h. restrepo, j. i. seible, f.
关键词：	concrete structures, cantilever bridges, post tensioning, dynamic loads, superstructures, expansive joints, earthquake engineering, structural analysis, construction, design, performance evaluation
摘要：	This report discusses the main findings of a test examining the seismic behavior of a precast, post-tensioned, segmental bridge superstructure with a cast-in-place, hollow, rectangular column. The half-scale specimen modeled a prototype bridge from midspan to midspan and down to midheight of the column. The bridge was built using the balanced cantilever method and the tendon layout of the specimen was designed to most closely match that of the prototype segment joints nearest to the column. The test was completed in two stages; the first stage prestressing level was designed to avoid any joint openings. This was a validation of existing bridge design procedures in which damage is limited to the column, and the superstructure remains elastic. The second stage involved removing some of the tendons to enable inelastic deformations of the joints in the superstructure and to impose on the joints nearest the column a more severe loading condition. The second stage of the test was done as an introductory examination of the performance of a bridge when damage is not limited to the column and inelastic motion is allowed in the superstructure. The primary objectives of the test were to investigate the response of the opening of the superstructure joints, column-superstructure interaction, and plastic hinge formation in the column, and the anticipated system failure mechanism. Extensive Instrumentation was used in the column as well as the joints of the superstructure to record the damage and performance of those bridge components. / NOTE: Final rept. Jun 03-Jun 04. / Supplementary Notes: Sponsored by California State Dept. of Transportation, Sacramento. Engineering Service 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.
总页数：	u0816；129p
报告类型：	科技报告