Tensile Lap SPLICES Part II: Design Recommendations for Retaining Wall Splices and Large Bar Splices.

摘要

As a continuation of Report 113-2,an additional 32full size beams were tested with No. 5 (1beam),No. 11,No. 14and No. 18tension bar splices. In addition to the usual variables,the ratio S/C (the clear spacing between splices to clear cover over them) was found to be an important variable. This ratio determines the type of splice failure to gueard against. The 1969 AASHO Specification is shown to be inadequate except for small bar sizes and large lateral spacings of splices. Other results indicate safe splices for Grade 40bars,tentative requirements for ties or spirals over the splices,and design requirements of lap splices for No. 14or No. 18bars. (Author)