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	Intermediate crack debonding in FRP-strengthened RC beams: FE analysis and strength model
	Lu, X. Z. ; Teng, J. G. ; Ye, L. P. ; Jiang, J. J.
	2010-05-10 ; 2010-05-10
会议名称	JOURNAL OF COMPOSITES FOR CONSTRUCTION ; 2nd International Conference on FRP Composites in Civil Engineering ; Adelaide, AUSTRALIA ; Web of Science
关键词	cracking bonding concrete beams concrete, reinforced finite element method fiber reinforced polymers REINFORCED-CONCRETE BEAMS POLYMER COMPOSITES PLATES MEMBERS SLABS ANCHORAGE BEHAVIOR STEEL BOND Engineering, Civil Mechanics Materials Science, Composites
中文摘要	Reinforced concrete (RC) beams strengthened in flexure with a bonded fiber-reinforced polymer (FRP) plate may fail by intermediate crack (IC) debonding, in which debonding initiates at a critical section in the high moment region and propagates to a plate end. This paper first presents a finite-element (FE) model based on the smeared crack approach for concrete for the numerical simulation of the IC debonding process. This finite-element model includes two novel features: (1) the interfacial behavior within the major flexural crack zone is differentiated from that outside this zone and (2) the effect of local slip concentrations near a flexural crack is captured using a dual local debonding criterion. The FE model is shown to be accurate through comparisons with the results of 42 beam tests. The paper also presents an accurate and simple strength model based on interfacial shear stress distributions from finite-element analyses. The new strength model is shown to be accurate through comparisons with the test results of 77 beams, including the 42 beams used in verifying the FE model, and is suitable for direct use in design.
会议录出版者	ASCE-AMER SOC CIVIL ENGINEERS ; RESTON ; 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/20108]
专题	清华大学
推荐引用方式 GB/T 7714	Lu, X. Z.,Teng, J. G.,Ye, L. P.,et al. Intermediate crack debonding in FRP-strengthened RC beams: FE analysis and strength model[C]. 见:JOURNAL OF COMPOSITES FOR CONSTRUCTION, 2nd International Conference on FRP Composites in Civil Engineering, Adelaide, AUSTRALIA, Web of Science.

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