Repair of Buildings & Bridges
with Composites
Center for Infrastructure
Engineering Studies
Missouri University of Science and Technology
223 Engineering Research Lab
500 W. 16th St.
Rolla, Missouri 65409
Phone: 573.341.4497
Fax: 573.341.6215
In continuous steel-reinforced concrete structures, redistribution of bending moments is permitted during design if certain ductility requirements are met. Ductility and rotation capacity allow some portion of ‘undesirable’ bending moment peaks (usually negative moments over supports) to be shed to more ‘desirable’ (usually positive moment) locations, so that efficient use is made of the chosen cross-section. When an existing continuous concrete structure is strengthened with CFRP laminates, its ductility and rotation capacity may be restricted due to the linearelastic response of the CFRP, and the increase in stiffness due to the presence of the CFRP can prevent moment redistribution once steel has yielded. This research project investigates the issue of redistribution in continuous CFRPstrengthened concrete slabs where alternatively, the cross section with the lower and higher peak moment have been strengthened. Experimental results are presented. |