Full-scale tests on composite concrete T-beams subjected to cyclic and monotonic loading. Issue 9 (17th August 2018)

• Record Type: Journal Article
• Authors: Xue, Weichen; Hu, Xiang; Yang, Yunjun
• Is Part Of: Proceedings of ICE. Volume 172:Issue 9(2019:Sep.)
• Page Start: 671
• Page End: 684
• Publication Date: 2018-08-17
• Subjects: beams & girders -- buildings, structures & design -- concrete structures; Civil engineering -- Periodicals; Structural engineering -- Periodicals; 624
• DOI: 10.1680/jstbu.17.00174
• Languages: English
• ISSNs: 0965-0911

Abstract

Abstract : The composite T-beams investigated in this study consisted of precast concrete beams, precast concrete slabs and cast-in-place (CIP) slabs. Improvement measures were adopted in two types of the composite T-beams: additional tie bars located in semi-circular grooves were added for strengthening the connection of the precast concrete slabs and an inverted T-shape precast concrete beam was used for strengthening the flexural stiffness of precast beams. Nine full-scale tests were conducted under low reversed cyclic loading and positive and negative monotonic loading. The results showed that the composite T-beams failed in a flexural pattern that was similar to that of the control CIP T-beams. All the T-beams exhibited good energy dissipation capacity and small slip was measured in the composite T-beams. The flexural strength of the composite T-beams was about 7·5% lower than that of the CIP T-beams. The curvature ductility of the composite T-beams was more than 4·0 and about 13% lower than that of the CIP T-beams. Due to cumulative damage, the flexural strength and curvature ductility of all the T-beams under cyclic loading was about 30% and 40% lower than that under monotonic loading, respectively. The improvement measures used in this work were effective at ensuring good performance of composite T-beams.