|Table of Contents|

Experimental study and theoretical calculation of normal section bearing capacity of double-layer hybrid-reinforced eccentric concrete columns(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年01期
Page:
71-81
Research Field:
建筑结构
Publishing date:

Info

Title:
Experimental study and theoretical calculation of normal section bearing capacity of double-layer hybrid-reinforced eccentric concrete columns
Author(s):
LU Chunhua;  GE Hao;  NI Mingzhi;  QI Zhonghao;  ZHANG Hongyu;  ZHANG Yunshu
(Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, Jiangsu, China)
Keywords:
GFRP bar;  double-layer hybrid reinforcement;  concrete column;  compression bearing capacity;  calculation formula
PACS:
TU317
DOI:
10.19815/j.jace.2023.03038
Abstract:
In order to study the eccentric compression performance of double-layer hybrid-reinforced concrete columns with ordinary steel bars and glass fiber reinforced polymer(GFRP)bars, the eccentric compression static load tests were conducted on three types of double-layer reinforced concrete columns. The comparative analysis was conducted on the eccentric compression failure process, lateral deformation, and load-strain relationship of double-layer hybrid-reinforced concrete columns and double-layer single-reinforced concrete columns, and the calculation formula for the bearing capacity of the normal section of double-layer hybrid-reinforced concrete columns was derived. The results show that under the same reinforcement ratio, the ultimate bearing capacity of double-layer hybrid-reinforced columns is significantly higher than that of pure steel-reinforced columns, and the ultimate bearing capacity of pure GFRP-reinforced columns is the smallest. The lateral deformations of the double-layer pure steel-reinforced column and the pure GFRP-reinforced column are smallest and largest respectively, and the double-layer hybrid-reinforced column is among them. The average strain distribution of the normal section of hybrid-reinforced concrete column still conforms to the plane section assumption. The predicted value of the proposed formula for calculating compression bearing capacity is in good agreement with the experiment measured value, with an average ratio of 0.98 and a coefficient of variation of 0.076. The research results can provide a certain theoretical basis for the application of double-layer hybrid-reinforced concrete in practical engineering.

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Last Update: 2025-01-20