Suggestions for the Design of R/C Lapped Spliced for Seismic Loading


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Title: Suggestions for the Design of R/C Lapped Spliced for Seismic Loading

Author(s): B. Sivakumar, P. Gergely, and R. N. White

Publication: Concrete International

Volume: 5

Issue: 2

Appears on pages(s): 46-50

Keywords: beams (supports); bond (concrete to rein-forcement); buckling; columns (supports); ductility; earthquake resistant structures; lap connections; reinforced concrete; reinforcing steels; research; splicing; stirrups; structural design.

Date: 2/1/1983

Based on experimental findings and analyses, suggestions are presented for the design of reinforced concrete lapped splices in beams and columns to sus-tain high-intensity cyclic flexural loads, with up to 15 cycles into the inelastic range of the spliced bars. The key aspect of the design is the provision of closely spaced, uniformly distributed stirrup-ties in the splice region. An equation is developed for the spacing of stirrups; transverse steel requirements for sections with three or more lap splices per layer and for splices with offset bars are also given An equation is proposed for the splice length as a function of the concrete strength.