The Effect of Intermediate Stiffeners on Steel Reinforced Concrete Beams Behaviors
Eight steel reinforced concrete beams (SRC), were
fabricated and tested under earthquake type cyclic loading. The
effectiveness of intermediate stiffeners, such as mid-span stiffener and
plastic hinge zone stiffeners, in enhancing composite action and
ductility of SRC beams was investigated. The effectiveness of
strengthened beam-to-column (SBC) and weakened beam-to-column
(WBC) connections in enhancing beam ductility was also studied. It
was found that: (1) All the specimens possessed fairly high flexural
ductility and were found adequate for structures in high seismic zones.
(2) WBC connections induced stress concentration which caused extra
damage to concrete near the flange tapering zone. This extra damage
inhibited the flexural strength development and the ductility of the
specimens with WBC connections to some extent. (3) Specimens with
SBC connections demonstrated higher flexural strength and ductility
compared to specimens with WBC connections. (4) The intermediate
stiffeners, especially combination of plastic hinge zone stiffener and
mid span stiffeners, have an obvious effect in enhancing the ductility
of the beams with SBC connection.
[1] Chen C.C. and Chen C.C., "Flexural behavior of steel encased composite
beams," Journal of the Chinese Institute of Civil and Hydraulic
Engineering, vol. 13, pp. 263-75, Feb. 2001.
[2] Plumier A., "Behavior of connections," Journal of Constructional. Steel
Research, vol. 29, pp. 95-119, 1994
[3] Chen, S.J., Yeh, C.H. and Chu, J.M., "Ductile steel beam-to-column
connection for seismic resistance," Journal of Structural
Engineering.-ASCE, vol. 122, pp. 1292-9, Nov. 1996.
[4] Chen, S.J., Chu, J.M. and Chou, Z.L., ÔÇÿDynamic behavior of steel frames
with beam flanges shaved around connection," Journal of Constructional
Steel Research, vol. 42, pp. 49-70, Jan. 1997.
[5] Kim, T., Whittaker, A.S., Gilani, A.S.J., Bertero, V.V. and Takhirov,
S.M., "Cover-plate and flange-plate steel moment-resisting connections,"
Journal of Structural Engineering.-ASCE, vol. 128, pp. 474-482, April
2002.
[6] Sumner, E.A. and Murray, T.M., "Behavior of extended end-plate
moment connections subject to cyclic loading," Journal of structural
engineering,-ASCE, vol. 128, pp. 501-8, April 2002.
[7] AISC., Specification for structural steel buildings. American Institute of
Steel Construction, 2005, Chicago. IL.
[8] Chen C.C. and Cheng C.L., "Flexural analysis and design methods for
SRC beam sections with complete composite action. Journal of the
Chinese Institute of Civil and Hydraulic Engineering, vol. 31, pp.
215-229, Feb. 2008.
[1] Chen C.C. and Chen C.C., "Flexural behavior of steel encased composite
beams," Journal of the Chinese Institute of Civil and Hydraulic
Engineering, vol. 13, pp. 263-75, Feb. 2001.
[2] Plumier A., "Behavior of connections," Journal of Constructional. Steel
Research, vol. 29, pp. 95-119, 1994
[3] Chen, S.J., Yeh, C.H. and Chu, J.M., "Ductile steel beam-to-column
connection for seismic resistance," Journal of Structural
Engineering.-ASCE, vol. 122, pp. 1292-9, Nov. 1996.
[4] Chen, S.J., Chu, J.M. and Chou, Z.L., ÔÇÿDynamic behavior of steel frames
with beam flanges shaved around connection," Journal of Constructional
Steel Research, vol. 42, pp. 49-70, Jan. 1997.
[5] Kim, T., Whittaker, A.S., Gilani, A.S.J., Bertero, V.V. and Takhirov,
S.M., "Cover-plate and flange-plate steel moment-resisting connections,"
Journal of Structural Engineering.-ASCE, vol. 128, pp. 474-482, April
2002.
[6] Sumner, E.A. and Murray, T.M., "Behavior of extended end-plate
moment connections subject to cyclic loading," Journal of structural
engineering,-ASCE, vol. 128, pp. 501-8, April 2002.
[7] AISC., Specification for structural steel buildings. American Institute of
Steel Construction, 2005, Chicago. IL.
[8] Chen C.C. and Cheng C.L., "Flexural analysis and design methods for
SRC beam sections with complete composite action. Journal of the
Chinese Institute of Civil and Hydraulic Engineering, vol. 31, pp.
215-229, Feb. 2008.
@article{"International Journal of Architectural, Civil and Construction Sciences:57343", author = "Teguh Sudibyo and Cheng-Cheng Chen", title = "The Effect of Intermediate Stiffeners on Steel Reinforced Concrete Beams Behaviors", abstract = "Eight steel reinforced concrete beams (SRC), were
fabricated and tested under earthquake type cyclic loading. The
effectiveness of intermediate stiffeners, such as mid-span stiffener and
plastic hinge zone stiffeners, in enhancing composite action and
ductility of SRC beams was investigated. The effectiveness of
strengthened beam-to-column (SBC) and weakened beam-to-column
(WBC) connections in enhancing beam ductility was also studied. It
was found that: (1) All the specimens possessed fairly high flexural
ductility and were found adequate for structures in high seismic zones.
(2) WBC connections induced stress concentration which caused extra
damage to concrete near the flange tapering zone. This extra damage
inhibited the flexural strength development and the ductility of the
specimens with WBC connections to some extent. (3) Specimens with
SBC connections demonstrated higher flexural strength and ductility
compared to specimens with WBC connections. (4) The intermediate
stiffeners, especially combination of plastic hinge zone stiffener and
mid span stiffeners, have an obvious effect in enhancing the ductility
of the beams with SBC connection.", keywords = "Composite beam, concrete encased steel beam, steel
reinforced concrete, stiffeners.", volume = "6", number = "8", pages = "620-8", }