TY - JOUR
T1 - Shear-reinforced concrete breakout design methodology for moment transfer at column-foundation connections
AU - Worsfold, Benjamin L.
AU - Moehle, Jack P.
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/5/15
Y1 - 2023/5/15
N2 - Recent studies have shown that the strength of column-foundation connections carrying moment can be limited by the concrete breakout failure mode. Distributed shear reinforcement in the concrete breakout cone region has been observed to increase the strength and displacement capacity of structural connections governed by breakout. However, the ACI 318–19 building code does not allow designers to consider this strength increase. Rather, the code allows the use of anchor reinforcement provided that the concrete contribution to strength is ignored. This paper proposes a design methodology to calculate the breakout strength considering the additive effect of concrete and reinforcement. Physical test data and finite element simulations from previous studies were used to calibrate the proposed strength equations. Detailing requirements are discussed.
AB - Recent studies have shown that the strength of column-foundation connections carrying moment can be limited by the concrete breakout failure mode. Distributed shear reinforcement in the concrete breakout cone region has been observed to increase the strength and displacement capacity of structural connections governed by breakout. However, the ACI 318–19 building code does not allow designers to consider this strength increase. Rather, the code allows the use of anchor reinforcement provided that the concrete contribution to strength is ignored. This paper proposes a design methodology to calculate the breakout strength considering the additive effect of concrete and reinforcement. Physical test data and finite element simulations from previous studies were used to calibrate the proposed strength equations. Detailing requirements are discussed.
KW - Anchor reinforcement
KW - Anchoring to concrete
KW - Breakout
KW - Column-foundation connection
KW - Finite element modeling
KW - Shear reinforcement
KW - Supplementary reinforcement
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U2 - 10.1016/j.engstruct.2023.115783
DO - 10.1016/j.engstruct.2023.115783
M3 - Article
AN - SCOPUS:85149318332
SN - 0141-0296
VL - 283
JO - Engineering Structures
JF - Engineering Structures
M1 - 115783
ER -