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原文传递 Time-Dependent Effects from Monitoring of State Street Bridge FRP Composite Retrofit.

题名：	Time-Dependent Effects from Monitoring of State Street Bridge FRP Composite Retrofit.
作者：	pantelides, c. p. reay, j. t. reaveley, l. d.
关键词：	durability, monitoring, bridge maintenance, strengthening, concrete columns, nondestructive tests, destructive tests, recommendations, seismic retrofit, time-dependent effects
摘要：	This project report summarizes the results of monitoring the State Street Bridge on Interstate 80, which is a reinforced concrete bridge retrofitted with Fiber Reinforced Polymer Composites. Strengthening reinforced concrete bridges by using Fiber Reinforced Polymer (FRP) composites is proving to be a more effective method compared to traditional retrofit methods. FRP composites have a number of advantages over reinforced concrete and structural steel, including their high strength-to-weight ratio and excellent durability, and have been used widely to replace steel in the retrofit of concrete columns. Destructive and nondestructive techniques were employed to evaluate the long-term durability of the Carbon FRP (CFRP) composite and externally CFRP-reinforced concrete of the State Street Bridge on Interstate 80, including the bond-to-concrete capacity of the CFRP composite for three years of exposure. Thermographic imaging was used for detection of voids between CFRP composite and concrete. Although environmental conditions were found to have an effect on the long term durability of the CFRP composite and CFRP-reinforced concrete substrate, no evidence of further steel reinforcement corrosion was observed, and the CFRP composite retrofit is still effective. The research has shown that the seismic performance capability of the bridge did not degrade significantly when compared to the original conditions in 2000 when the retrofit was done. Recommendations for implementation and future research are made. / Supplementary Notes: Prepared in cooperation with Utah Univ., Salt Lake City. Dept. of Civil and Environmental Engineering. Sponsored by Federal Highway Administration, Salt Lake City, UT. Utah 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：	u0723；33p
报告类型：	科技报告