A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic strengthening of exterior beam-column joints using CFRP sheets
Out of many conventional and relatively old strengthening techniques, joint strengthening using fiberreinforced polymers (FRP) has the advantages of simplicity of application and less need for skilled labor. The objective of the present research program is to develop a better strengthening system for strengthening the shear resistance and improving the ductility of exterior beam column joints. For this purpose, two reinforced concrete exterior beam-column sub-assemblage were cast with non-optimal design parameters (inadequate joint shear strength with no transverse reinforcement) representing preseismic code design construction practice of joints and encompassing the vast majority of existing beamcolumn joints. One joint specimen was tested as control (i.e. before strengthening) and other was tested after strengthening. For strengthening CFRP sheets were epoxy-bonded to joint, beams and part of the column regions. The specimens were subjected to cyclic lateral load histories so as to provide the equivalent of severe earthquake damage. Response histories of the unstrengthened and strengthened specimens were then compared. The results were compared through hysteretic loops, load-displacement envelops, ductility and stiffness degradation. The test results, in general, show that CFRP sheets can effectively and efficiently improve the shear strength and ductility of seismically deficient exterior joints.
Seismic strengthening of exterior beam-column joints using CFRP sheets
Out of many conventional and relatively old strengthening techniques, joint strengthening using fiberreinforced polymers (FRP) has the advantages of simplicity of application and less need for skilled labor. The objective of the present research program is to develop a better strengthening system for strengthening the shear resistance and improving the ductility of exterior beam column joints. For this purpose, two reinforced concrete exterior beam-column sub-assemblage were cast with non-optimal design parameters (inadequate joint shear strength with no transverse reinforcement) representing preseismic code design construction practice of joints and encompassing the vast majority of existing beamcolumn joints. One joint specimen was tested as control (i.e. before strengthening) and other was tested after strengthening. For strengthening CFRP sheets were epoxy-bonded to joint, beams and part of the column regions. The specimens were subjected to cyclic lateral load histories so as to provide the equivalent of severe earthquake damage. Response histories of the unstrengthened and strengthened specimens were then compared. The results were compared through hysteretic loops, load-displacement envelops, ductility and stiffness degradation. The test results, in general, show that CFRP sheets can effectively and efficiently improve the shear strength and ductility of seismically deficient exterior joints.
Seismic strengthening of exterior beam-column joints using CFRP sheets
Seismische Verfestigung von Verbindungen an externen Trägersäulen mittels Kohlefaser verstärkten Kunststoffplatten
Alsayed, Saleh H. (author) / Al-Salloum, Yousef A. (author) / Almusallam, Tarek H. (author) / Siddiqui, Nadeem A. (author)
2008
9 Seiten, 10 Bilder, 1 Tabelle, 19 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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