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Indexed by:期刊论文

Date of Publication:2017-09-01

Journal:JOURNAL OF MATERIALS IN CIVIL ENGINEERING

Included Journals:SCIE、EI

Volume:29

Issue:9

ISSN No.:0899-1561

Key Words:Self-compacting lightweight aggregate concrete; Plain round bar; Bond stress-slip relationship; Lateral tensions

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. (C) 2017 American Society of Civil Engineers.