TY - JOUR
T1 - Evaluation of moment distribution in continuous fiber-reinforced polymer-strengthened concrete beams
AU - Silva, P F
AU - Ibell, T J
PY - 2008/11/1
Y1 - 2008/11/1
N2 - Fiber-reinforced polymer (FRP) strengthening offers many well-documented benefits for the retrofit of existing reinforced concrete (RC) structures. The main drawback in using FRP for such applications, however, is the reduction in ductility capacity after strengthening. This loss in ductility has led worldwide codes to not consider redistribution of bending moments in continuous FRP-strengthened RC beams. This implies that an unstrengthened continuous RC beam that was previously designed under assumptions of moment redistribution (MR) and is to be strengthened with FRP must now be redesigned according to full elastic distribution of bending moments. This could lead to onerous conditions in such strengthening applications. This paper sets out a rationale for the possible appropriate use of redistribution principles for FRP-strengthened beams. Analytical results show that if a section can develop a curvature ductility capacity, greater than 2.0, it is likely that redistribution in the order of at least 7.5% can be achieved. These results are presented and further discussed in this paper
AB - Fiber-reinforced polymer (FRP) strengthening offers many well-documented benefits for the retrofit of existing reinforced concrete (RC) structures. The main drawback in using FRP for such applications, however, is the reduction in ductility capacity after strengthening. This loss in ductility has led worldwide codes to not consider redistribution of bending moments in continuous FRP-strengthened RC beams. This implies that an unstrengthened continuous RC beam that was previously designed under assumptions of moment redistribution (MR) and is to be strengthened with FRP must now be redesigned according to full elastic distribution of bending moments. This could lead to onerous conditions in such strengthening applications. This paper sets out a rationale for the possible appropriate use of redistribution principles for FRP-strengthened beams. Analytical results show that if a section can develop a curvature ductility capacity, greater than 2.0, it is likely that redistribution in the order of at least 7.5% can be achieved. These results are presented and further discussed in this paper
UR - http://www.scopus.com/inward/record.url?scp=68349104245&partnerID=8YFLogxK
UR - http://www.concrete.org/PUBS/JOURNALS/OLJDetails.asp?keywords=moment+distribution&srchtype=ALL&date=anytime&searchmonth=1&searchday=1&searchyear=2008&publication=Structural+Journal&direction=FWD&lastrecord=15&Firstrecord=1&ID=20101
UR - http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP
M3 - Article
SN - 0889-3241
VL - 105
SP - 729
EP - 739
JO - ACI Structural Journal
JF - ACI Structural Journal
IS - 6
ER -