Splices in reinforced concrete columns in older buildings were typically designed as compression lap-splices. Compression lap-lengths are typically short (20 to 24d_b), and only light transverse reinforcement is provided over the lap-length. Observations of column damage following earthquakes have revealed that these splices perform poorly; however, relatively sparse information exists to assess the expected performance for typical conditions. To address these needs, a research program was undertaken to conduct testing of full-scale, cantilever columns with a point load applied at the top. The 450 mm square column sections were subjected to constant axial load and reversed cyclic lateral displacements. Primary variables include the level of axial load, the ratio of moment to shear, and the load history. An overview of this project, as well as relevant observations from column damage in recent earthquakes and preliminary test results, are provided.
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