期刊
ACI STRUCTURAL JOURNAL
卷 116, 期 2, 页码 183-194出版社
AMER CONCRETE INST
DOI: 10.14359/51711142
关键词
cyclic test; lap splice; offset bar splice; reinforced concrete column; seismic performance; splice detail; splice length
资金
- R&D Policy Infra program - Ministry of Land, Infrastructure, and Transportation (MOLIT) [15AUDP-B066083-03]
- National Research Foundation of Korea (NRF) - Ministry of Education [2018R1A6A1A07025819]
- National Research Foundation of Korea [2018R1A6A1A07025819] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, tension lap splices of longitudinal bars on columns subjected to cyclic lateral loading and low axial load (N = 0.15 to 0.185A(g)f(c)(')) were investigated. Cyclic lateral loading tests were performed for eight columns with different lengths and methods of lap splices. The test results showed that the flexural strength and ductility of columns were significantly affected by the lap splice offset methods, as well as by the lap splice length and the moment gradient. When the lower bars were offset inside the column for the lap splice, the ductility of the column was the greatest but the flexural strength was less than the nominal flexural strength without bar offsets. On the other hand, when the upper bars were offset or when the upper and lower bars were lap-spliced side by side without offset bends, the flexural strength of the columns satisfied the nominal strength but the ductility decreased. Based on the test results, design considerations for the lap splices are recommended.
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