Behavior of High-Strength Concrete Corner Columns Intersected by Weaker Slabs with Different Thicknesses

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Title: Behavior of High-Strength Concrete Corner Columns Intersected by Weaker Slabs with Different Thicknesses

Author(s): Siu C. Lee and Priyan Mendis

Publication: Structural Journal

Volume: 101

Issue: 1

Appears on pages(s): 11-18

Keywords: column; concrete; joint; load

Date: 1/1/2004

Abstract:
An experimental program was conducted on three square sandwich column specimens and three rectangular column specimens. These specimens consisted of high-strength concrete (HSC) and normal-strength concrete (NSC) in the column portions and slab regions, respectively. The thickness of the joint regions of these specimens ranged from 45 to 120 mm to investigate the effects of the aspect ratio of the joint thickness to the column dimension h/c and column rectangularity. An analogy with brick and mortar was then employed to examine the sandwich and corner column specimens tested by past researchers and the authors and to identify appropriate critical ratios of column concrete to slab concrete f¢cc/ f¢cs for different h/c aspect ratios. Accordingly, recommendations for predicting the failure of corner HSC column-NSC slab joints subjected to axial loads are proposed for design codes.