between concrete and derived and integrated to obtain splice cf-r,pni:-rth shape greatly affects strength of ..,v ....... ..., .. .,.., is short. words: rib shape, itself, is not adequate for developing comprehensive lap splice models. This paper uses an analytical…
between concrete and derived and integrated to obtain splice cf-r,pni:-rth shape greatly affects strength of ..,v ....... ..., .. .,.., is short. words: rib shape, itself, is not adequate for developing comprehensive lap splice models. This paper uses an analytical approach which provides a bird's view on the effects of the rib shape and splice length on the strength of splices and reasons for the experimental findings. The analysis consists of three steps: 1) obtain the relationship between radial stress and radial ing at the bar surface using a numerical model; 2) derive the local no11u-:-inn relationship considering the mechanisms of concrete fracture in front and the friction at the interface between the concrete and rib face; 3) integrate the local bond-slip relationship to calculate the splice strength con- sidering both the equilibrium between the bar axial stress and bond stress resultants and the compatibility of strains and slip. The slip changes abruptly at the discrete locations along the splice where cracking occurs. 2 Radial stress versus radial opening at the bar surface 2.1 Rigid-body-spring network model of beam cross-section The beam cross-section of Fujii et al. (1993) is partitioned an assem- blage of rigid bodies, or cells, interconnected along their boundaries L•AA·~~~··· flexible interfaces (Fig. la and 2). This type of rigid-body-spring was first introduced by Kawai ( 1978).