NEHRP Clearinghouse
- Title
- Behavior and Design of Reinforced Concrete Column-Type Lapped Splices Subjected to High-Intensity Cyclic Loading.
- File
- PB83165134.pdf
- Author(s)
- Sivakumar, B.; White, R. N.; Gergely, P.
- Source
- National Science Foundation, Washington, DC., October 1982, 216 p.
- Identifying Number(s)
- 82-11
- Abstract
- Results are presented of a study of the behavior and design of lapped splices in reinforced concrete column-type specimens under high-intensity flexural cyclic loads. Special attention is focused on the transverse steel requirements of specimens with more than two splices in a layer; the use of offsets in spliced bars; the effect of concrete strength on splice strength and behavior; and the strength of epoxy-repaired splices. Procedures are provided for the design of reinforced lapped splices to sustain at least twenty reversing load cycles beyond yield and a maximum rebar strain at the splice of at least 2.5 times the yield strain. The key aspect of the design is the provision of closely spaced uniformly distributed stirrup ties in the splice region. Equations are developed for the spacing of stirrups and the minimum splice length requirement. Stirrup requirements for sections with more than two lapped splices per layer and for splices with offset bars also are given.
- Keywords
- Earthquake resistant structures; Reinforced concrete; Columns (Supports); Reinforcing steels; Structural design; Splices; Earthquake engineering; Lap joints; Lapped splices; Cyclic loads; Epoxy resins