TY - GEN
T1 - Comparative structural response of UHPC and normal strength concrete columns under combined axial and lateral cyclic loading
AU - Aboukifa, Mahmoud
AU - Moustafa, Mohamed A.
AU - Itani, Ahmad
N1 - Publisher Copyright:
© 2020 American Concrete Institute. All rights reserved.
PY - 2020/7/17
Y1 - 2020/7/17
N2 - Ultra-High Performance Concrete (UHPC) is a versatile building material as it is characterized by very high compressive strengths reaching 30 ksi [200 MPa], ductile tensile characteristics, and energy absorption. Currently, UHPC is commonly used in limited structural applications, such as joints and connections between precast structural elements. To extend the use of UHPC in full structural elements, a better understanding of the structural behavior and failure mechanism of such elements is needed. One potential application of UHPC for structural elements is columns, which is the focus of this study. This paper presents an experimental investigation of the behavior of UHPC column subjected to combined axial and lateral loading. A large-scale UHPC column is tested under axial and quasi-static cyclic lateral loading at the Earthquake Engineering Laboratory at the University of Nevada, Reno. To establish a comparison with conventional columns, a normal strength concrete (NSC) column with same dimensions and design as the tested UHPC column is analytically modeled and analyzed under similar loading protocol using OpenSEES. The experimental response of the UHPC column is evaluated and compared to the analytical response of the NSC column. Both global and local behavior are presented and discussed to include damage progression, failure type, peak moment strength, stiffness degradation, and displacement and curvature ductility.
AB - Ultra-High Performance Concrete (UHPC) is a versatile building material as it is characterized by very high compressive strengths reaching 30 ksi [200 MPa], ductile tensile characteristics, and energy absorption. Currently, UHPC is commonly used in limited structural applications, such as joints and connections between precast structural elements. To extend the use of UHPC in full structural elements, a better understanding of the structural behavior and failure mechanism of such elements is needed. One potential application of UHPC for structural elements is columns, which is the focus of this study. This paper presents an experimental investigation of the behavior of UHPC column subjected to combined axial and lateral loading. A large-scale UHPC column is tested under axial and quasi-static cyclic lateral loading at the Earthquake Engineering Laboratory at the University of Nevada, Reno. To establish a comparison with conventional columns, a normal strength concrete (NSC) column with same dimensions and design as the tested UHPC column is analytically modeled and analyzed under similar loading protocol using OpenSEES. The experimental response of the UHPC column is evaluated and compared to the analytical response of the NSC column. Both global and local behavior are presented and discussed to include damage progression, failure type, peak moment strength, stiffness degradation, and displacement and curvature ductility.
KW - Ductility
KW - Large-scale testing
KW - Seismic behavior
KW - UHPC column
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M3 - Conference contribution
AN - SCOPUS:85095949544
T3 - American Concrete Institute, ACI Special Publication
SP - 71
EP - 96
BT - Structural Performance of Concrete Columns Incorporating Advanced Materials and Structural Systems
A2 - ElGawady, Mohamed A.
PB - American Concrete Institute
T2 - Structural Performance of Concrete Columns Incorporating Advanced Materials and Structural Systems at the Concrete Convention and Exposition 2018
Y2 - 14 October 2018 through 18 October 2018
ER -