Research on Mechanical Properties of Precast Geopolymer Concrete Sandwich Panels Under Axial Compression

ZHAO Meng; HUANG Junqi; CHONG Xun; JIANG Qing; FENG Yulong

doi:10.3724/j.gyjzG23061204

Volume 54 Issue 6

Jun. 2024

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ZHAO Meng, HUANG Junqi, CHONG Xun, JIANG Qing, FENG Yulong. Research on Mechanical Properties of Precast Geopolymer Concrete Sandwich Panels Under Axial Compression[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(6): 169-176. doi: 10.3724/j.gyjzG23061204

Citation:

ZHAO Meng, HUANG Junqi, CHONG Xun, JIANG Qing, FENG Yulong. Research on Mechanical Properties of Precast Geopolymer Concrete Sandwich Panels Under Axial Compression[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(6): 169-176. doi: 10.3724/j.gyjzG23061204

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Research on Mechanical Properties of Precast Geopolymer Concrete Sandwich Panels Under Axial Compression

doi: 10.3724/j.gyjzG23061204

ZHAO Meng¹,
HUANG Junqi^{1,2
,
,},
CHONG Xun^1,2,
JIANG Qing^1,2,
FENG Yulong^1,2

1. College of Civil Engineering, Hefei University of Technology, Hefei 230009, China;
2. Anhui Key Laboratory of Civil Engineering and Materials, Hefei 230009, China

Received Date: 2023-06-12
Available Online: 2024-06-24

Abstract

Abstract

Six precast geopolymer concrete sandwich panels enabled by glass fiber reinforced polymer (GFRP) hexagonal tubular connectors were fabricated and tested under axial compression. The effects of three key parameters, including the connector spacing, panel height and wythe thickness, on the failure mode, bearing capacity and deformation of the specimens under axial compression were studied and discussed. The results showed that all specimens exhibited large eccentric compression failure due to the second-order effect, which was characterized by the concrete crushing and horizontal cracking in the two wythes, respectively; with the increase of the distance between the connectors, the composite performance of the wall panel was reduced, the area of the concrete crushing area decreased, the lateral deformation increased, and the bearing capacity of the specimens decreased gradually (when the distance between the connectors increased from 300 mm to 600, 900 mm, and without connectors, the bearing capacity decreased by 17.1%, 42.0%, 49.5%, respectively). With the decrease of the height of the wall panel or the increase of the thickness of the wythes, the slenderness ratio and the second-order effect of the specimens gradually decreased, the area of the concrete crushing zone increased, the out-of-plane deformation decreased, and the bearing capacity of the specimen increased (when the thickness of the wythes increased from 50 mm to 75 mm or the height decreased from 2 100 mm to 1 500 mm, the bearing capacity of the specimen increased by 34.3% and 5.9%, respectively).
- geopolymer concrete,
- precast concrete sandwich panel,
- FRP connector,
- axial compression,
- failure mode

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References(20)

References

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