TY - JOUR
T1 - Strengthening of axially and eccentrically compression loaded RC columns with UHPC jacketing system
T2 - Experimental investigation and finite element modeling
AU - Al-Osta, Mohammed A.
AU - Sharif, Alfarabi M.
AU - Suhoothi, A. C.Mohamed
AU - Najamuddin, Syed Khaja
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/10/15
Y1 - 2021/10/15
N2 - The paper presents an experimental and numerical evaluation of reinforced concrete (RC) columns strengthened with ultra-high-performance concrete (UHPC). Fifteen columns were tested under static eccentric loading. The variables considered in the experimental program are the thickness of UHPC and the loading eccentricity. A three-dimensional (3D) numerical model was developed using ABAQUS software and validated with the experimental results. The validated numerical model was utilized to develop additional results of the strengthened RC column considering UHPC strength as a variable. Finally, an analytical model was proposed to predict the failure load and moment for rectangular RC columns strengthened with UHPC. The results confirmed the effectiveness of UHPC jacketing to strengthen RC columns under eccentric loading. The degree of enhancement is proportional to UHPC jacket thickness and inversely proportional to the nominal eccentricity. The proposed analytical model accurately predicted the failure load and moment for rectangular RC columns strengthened with UHPC.
AB - The paper presents an experimental and numerical evaluation of reinforced concrete (RC) columns strengthened with ultra-high-performance concrete (UHPC). Fifteen columns were tested under static eccentric loading. The variables considered in the experimental program are the thickness of UHPC and the loading eccentricity. A three-dimensional (3D) numerical model was developed using ABAQUS software and validated with the experimental results. The validated numerical model was utilized to develop additional results of the strengthened RC column considering UHPC strength as a variable. Finally, an analytical model was proposed to predict the failure load and moment for rectangular RC columns strengthened with UHPC. The results confirmed the effectiveness of UHPC jacketing to strengthen RC columns under eccentric loading. The degree of enhancement is proportional to UHPC jacket thickness and inversely proportional to the nominal eccentricity. The proposed analytical model accurately predicted the failure load and moment for rectangular RC columns strengthened with UHPC.
KW - Analytical model
KW - Eccentric loading
KW - Numerical model
KW - RC columns
KW - Strengthening
KW - Ultra-high-performance-concrete
UR - https://www.scopus.com/pages/publications/85111047156
U2 - 10.1016/j.engstruct.2021.112850
DO - 10.1016/j.engstruct.2021.112850
M3 - Article
AN - SCOPUS:85111047156
SN - 0141-0296
VL - 245
JO - Engineering Structures
JF - Engineering Structures
M1 - 112850
ER -