TY - JOUR
T1 - Axial-flexural behavior of FRP grid-reinforced geopolymer concrete sandwich wall panels enabled with FRP connectors
AU - Kumar, Sushil
AU - Chen, Binqi
AU - Xu, Yuye
AU - Dai, Jian Guo
N1 - Funding Information:
The authors would like to express their gratitude to the National Key Research Program of China (Grant No: 2017YFC0703002 ), Hong Kong RGC General Research Fund (Project code: 15214517 ), the Construction Industry Council , Hong Kong SAR (Project code: K-ZJK2 ), the National Science Foundation of China (Project No: 51778247 ), the Research Institute for Sustainable Urban Development , of The Hong Kong Polytechnic University (Project Nos. 1-BBWA and 1-BBWE) for the financial support to this research project. The authors are also grateful to the College of Civil Engineering, Huaqiao University, Xiamen, China, for providing access to the lab facility to carry out experimental works.
Funding Information:
The authors would like to express their gratitude to the National Key Research Program of China (Grant No: 2017YFC0703002), Hong Kong RGC General Research Fund (Project code: 15214517), the Construction Industry Council, Hong Kong SAR (Project code: K-ZJK2), the National Science Foundation of China (Project No: 51778247), the Research Institute for Sustainable Urban Development, of The Hong Kong Polytechnic University (Project Nos. 1-BBWA and 1-BBWE) for the financial support to this research project. The authors are also grateful to the College of Civil Engineering, Huaqiao University, Xiamen, China, for providing access to the lab facility to carry out experimental works.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/4/15
Y1 - 2022/4/15
N2 - This paper presents experimental and theoretical investigations conducted on a novel precast concrete sandwich wall panel (SWP) subjected to eccentric axial loading. The proposed SWP is composed of geopolymer concrete wythes which were embedded with basalt fiber reinforced polymer (FRP) bars/grids. Hollow Glass FRP (GFRP) tubes were used as connectors. Nine such SWPs were prefabricated and tested. The key design test parameters considered were slenderness ratio of the SWP, load eccentricity, and type of longitudinal reinforcement (FRP bar or grid) in wythes. The failure modes, load-deformation behavior, and load-strain behavior were studied and reported. It was found that the axial load capacities of the eccentrically loaded SWPs subject to load eccentricity-to-sectional thickness ratios of 0.15, 0.45, and 0.63 were reduced by 35%, 75%, and 85% (average of the load capacity values for the slender and squat SWPs), respectively, compared to their counterpart concentrically loaded SWPs. A second-order theoretical analysis was also conducted to obtain the axial load-moment interaction curves of equivalently assumed sections, and the outcomes were compared with the experimental ones to validate the modeling.
AB - This paper presents experimental and theoretical investigations conducted on a novel precast concrete sandwich wall panel (SWP) subjected to eccentric axial loading. The proposed SWP is composed of geopolymer concrete wythes which were embedded with basalt fiber reinforced polymer (FRP) bars/grids. Hollow Glass FRP (GFRP) tubes were used as connectors. Nine such SWPs were prefabricated and tested. The key design test parameters considered were slenderness ratio of the SWP, load eccentricity, and type of longitudinal reinforcement (FRP bar or grid) in wythes. The failure modes, load-deformation behavior, and load-strain behavior were studied and reported. It was found that the axial load capacities of the eccentrically loaded SWPs subject to load eccentricity-to-sectional thickness ratios of 0.15, 0.45, and 0.63 were reduced by 35%, 75%, and 85% (average of the load capacity values for the slender and squat SWPs), respectively, compared to their counterpart concentrically loaded SWPs. A second-order theoretical analysis was also conducted to obtain the axial load-moment interaction curves of equivalently assumed sections, and the outcomes were compared with the experimental ones to validate the modeling.
KW - BFRP reinforcement
KW - Eccentric axial load
KW - Geopolymer concrete
KW - GFRP connector
KW - Sandwich wall panel
KW - Theoretical second-order analysis
UR - http://www.scopus.com/inward/record.url?scp=85121465361&partnerID=8YFLogxK
U2 - 10.1016/j.jobe.2021.103907
DO - 10.1016/j.jobe.2021.103907
M3 - Journal article
AN - SCOPUS:85121465361
SN - 2352-7102
VL - 47
JO - Journal of Building Engineering
JF - Journal of Building Engineering
M1 - 103907
ER -