Bond-Slip Response of Plain Bars Embedded in Self-Compacting Lightweight Aggregate Concrete under Lateral Tensions
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 9
Abstract
Recently, self-compacting lightweight aggregate concrete (SCLC) has been increasingly used in civil engineering. The bond behavior between plain bars and SCLC is an indispensable factor in the design of members that require high shear capacity. In such members, the anchorage of plain bars might be weakened by lateral tensions, which is experimentally studied in the current paper. A total of 134 pullout specimens considering different compressive strengths of SCLC, bar diameters, and combinations of lateral tension were tested to investigate the local bond stress-slip characteristics between plain round bars and SCLC. The test results show that all specimens failed by pulling out of the bar with no splitting crack. As the average lateral tension increased, the normalized ultimate and residual bond strength ratios of SCLC decreased, whereas the slips at peak bond stress first increased and then remained constant, which were generally parallel to those of normal-weight concrete. An empirical model was finally proposed to describe the local bond stress-slip relationship between plain bars and SCLC under lateral tension.
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Acknowledgments
Financial support from the National Natural Science Foundation Grant Nos. 51278082 and 51421064 of the People’s Republic of China, the UK Royal Academy of Engineering through the Distinguished Visiting Fellow scheme under grant DVF1617_5_21, and the Fundamental Research Funds for the Central Universities No. DUT15RC(3)028 is gratefully acknowledged.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 9 • September 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 6, 2016
Accepted: Nov 17, 2016
Published online: Apr 11, 2017
Published in print: Sep 1, 2017
Discussion open until: Sep 11, 2017
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