内置碳纤维增强复材管的双管海水海沙混凝土柱轴压性能

缪坤廷; 魏洋; 王高飞; 董峰辉; 郑开启

doi:10.13204/j.gyjzG22030410

内置碳纤维增强复材管的双管海水海沙混凝土柱轴压性能

doi: 10.13204/j.gyjzG22030410

南京林业大学土木工程学院, 南京 210037

基金项目:

国家自然科学基金项目(51778300)

江苏省重点研发计划项目(BE2020703)

江苏省高校“青蓝工程”项目(2020)

江苏省自然科学基金项目(BK20151520、BK20191390)

江苏省研究生科研与实践创新计划项目(KYCX21_0880)

江苏省六大人才高峰项目(JZ-017)

详细信息

作者简介:
缪坤廷,男,1997年出生,硕士研究生

通讯作者:
魏洋,男,1978年出生,博士,教授,wy78@njfu.edu.cn。

计量
- 文章访问数: 365
- HTML全文浏览量: 23
- PDF下载量: 19
- 被引次数: 0
出版历程
- 收稿日期: 2022-03-04
- 网络出版日期: 2023-02-06

Mechanical Properties of Double-Tube Seawater and Sea Sand Concrete Columns with Built-in CFRP Tubes Under Axial Compression

College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China

摘要

摘要: 为了解决海水海沙混凝土在实际工程中的腐蚀问题,增强结构的抗震性能,提出了一种内置碳纤维增强复材(CFRP)管的双管海水海沙混凝土柱的新型结构,对12个内置CFRP管的双管海水海沙混凝土柱和4个普通钢管混凝土柱进行了轴向压缩试验,研究了钢管厚度和CFRP管层数对于其轴压性能的影响。试验结果表明,内部的CFRP管可以有效提高结构的承载力和延性,增强结构的抗压性能和变形能力。内置CFRP管的双管海水海沙混凝土柱的破坏往往伴随着其中1根CFRP管破坏,其余的CFRP管仍然可以提供约束,并在加载过程中依次破坏。基于面积等效和区域分割的理念,提出了内置CFRP管的双管海水海沙混凝土柱的轴压承载力计算式,并对预测精度和离散度进行了评估。
- 内置CFRP管 /
- 海水海沙混凝土 /
- 钢管 /
- 轴压性能 /
- 计算模型
Abstract: In order to solve the corrosion problems caused by seawater and sea sand concrete in the engineering practice and enhance the seismic performance of structure, a novel structure called double-tube seawater and sea sand concrete columns with built-in CFRP tubes was proposed. Axial compression test was performed on 12 double-tube seawater and sea sand concrete columns with built-in CFRP tubes and 4 concrete-filled steel tube columns. The effect of the thickness of steel tube and the layers of CFRP tube was investigated. Test results indicated that the built-in CFRP tube could improve the bearing capacity and deformation capacity of the structure. The failure of double-tube seawater and sea sand concrete columns with built-in CFRP tubes was usually accompanied by the failure of one of built-in CFRP tubes, while the rest of CFRP tubes could still provide confinement and broke in turn during loading. Based on the theory of area equivalence and area segmentation, a model for ultimate load of double-tube seawater and sea sand concrete columns with built-in CFRP tubes was proposed. Finally, the prediction accuracy and dispersion of the formula were evaluated.
- built-in CFRP tube /
- seawater and sea sand concrete /
- steel tube /
- mechanical properties under axial compression /
- calculation model

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