不同壁厚钢管再生混凝土短柱轴压力学性能研究

阿里甫江·夏木西; 谭锬

doi:10.13568/j.cnki.651094.651316.2022.01.22.0007

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不同壁厚钢管再生混凝土短柱轴压力学性能研究

工程技术 | 更新时间：2026-01-21

- 不同壁厚钢管再生混凝土短柱轴压力学性能研究
- 不同壁厚钢管再生混凝土短柱轴压力学性能研究
- 新疆大学学报（自然科学版中英文） 2022年39卷第6期页码：754-763
- 作者机构：
  
  新疆大学建筑工程学院
- 作者简介：
- 基金信息：
  
  国家自然科学基金（51968068）
- DOI：10.13568/j.cnki.651094.651316.2022.01.22.0007
  中图分类号： TU398.9
- 纸质出版：2022
- 稿件说明：
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[1]阿里甫江·夏木西,谭锬.不同壁厚钢管再生混凝土短柱轴压力学性能研究[J].新疆大学学报(自然科学版)(中英文),2022,39(06):754-763.
[1]阿里甫江·夏木西,谭锬.不同壁厚钢管再生混凝土短柱轴压力学性能研究[J].新疆大学学报(自然科学版)(中英文),2022,39(06):754-763. DOI： 10.13568/j.cnki.651094.651316.2022.01.22.0007.

DOI：10.13568/j.cnki.651094.651316.2022.01.22.0007.

摘要

为了明确100%再生骨料取代率下钢管壁厚对钢管再生混凝土短柱（RACFST）受力性能的影响规律，开展了试验研究．分别设计了10根圆形截面的钢管混凝土试件（CFST）和RACFST试件并进行轴压试验．根据试验结果进行了对比分析，研究了钢管壁厚对破坏模式、荷载位移和荷载应变曲线、刚度、断裂韧性、延性、离散性等关键指标的影响机理，同时对承载力计算方法进行了探讨．结果表明：壁厚的增加能有效改善RACFST的力学性能并降低其性能的离散性；随着单位含钢率的增加，CFST和RACFST的承载效率趋于劣化；随着钢管壁厚的减少，规范公式承载力预测可靠度降低．最终，推荐圆形截面RACFST承载力计算公式，并验证了其准确性和稳定性；推荐套箍系数合理的取值范围为1.22～1.41.

Abstract

To make clear the effect of the wall-thickness of steel tube on the mechanical behavior of Recycled Aggregate Concrete-Filled Steel Tube(RACFST) short columns with 100% recycled coarse aggregate replacement ratio

experimental studies were performed. 10 circular Concrete-Filled Steel Tube(CFST) and RACFST specimens

respectively

were fabricated and tested under axial compression. The influencing mechanism of wallthickness on the failure mode

load-displacement and load-strain curves

stiffness

fracture toughness

ductility and performance-discreteness were analyzed

and the strength predicting method was discussed as well. The results show that the increase of wall-thickness can effectively improve the mechanical performance of RACFST and relieves the performance-discreteness; the load-carrying capacity of CFST and RACFST tends to decrease with the increase of the steel ratio

and the strength predicting equation proposed by code becomes unstable with the decrease of wall-thickness. As a result

an equation for predicting the ultimate load bearing capacity of RACFST was recommended

and its accuracy and reliability were validated; the reasonable range of the confinement coefficient for RACFST was recommend as 1.22～1.41.

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references

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