Effect of Rebar Splice on Rebar Strain Profile and Out of Plane Buckling of Boundary Elements of Lightly Reinforced Shear Walls

Document Type : Original Article

Authors

1 Department of Civil Engineering, Faculty of Engineering, Urmia University, Urmia, Iran

2 Professor, Civil Engineering Department, Urmia University, Urmia, Iran

3 Associate Professor

Abstract

Due to adverse effect of lap splice on the ductility of shear walls, ACI 318-19 does not allows use of lap splice in stories with probable nonlinear excursions. However, due to lack of capacity design in ACI design approach for shear walls, in fact there are high probability of nonlinear deformation in all stories. This means possible nonlinear ABSTRACT
Due to adverse effect of lap splice on the ductility of shear walls, ACI 318-19 does not allows use of lap splice in stories with probable nonlinear excursions. However, due to lack of capacity design in ACI design approach for shear walls, in fact there are high probability of nonlinear deformation in all stories. This means possible nonlinear demand in stories with lap spliced bars. This paper investigates performance of lap spliced boundary elements of lightly reinforced shear walls, where boundary elements subjected to mainly tensile loadings. Two specimens with continuous rebars and three specimens with lap splice of different lengths are included in the experimental program. The specimens are subjected to asymmetric cyclic axial loading. Test results reveals that lap splice increases deformation demand on the portions of the specimen out side of lap splice length, leading to rebar fracture at lateral drifts much smaller than that excepted for specimens with continuous rebars. Presence of lap splice could substantially decrease lateral drift capacity from 0.04 to about 0.013. Also out of plane buckling for specimens with lap splice occurs at smaller tensile strains.

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References

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Journal of Structural and Construction Engineering
Volume 8, Issue 10 - Serial Number 50
January 2022
Pages 240-251

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History

  • Receive Date: 30 April 2020
  • Revise Date: 11 July 2020
  • Accept Date: 15 July 2020

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