内压作用下碳纤维增强复合材料内衬加固预应力钢筒混凝土管承载力分析

张霄杰; 吴嘉瑜; 陈建飞

doi:10.3724/j.gyjzG23071211

内压作用下碳纤维增强复合材料内衬加固预应力钢筒混凝土管承载力分析

doi: 10.3724/j.gyjzG23071211

1. 哈尔滨工业大学航天学院, 哈尔滨 150006;
2. 南方科技大学海洋科学与工程系, 广东深圳 518055

基金项目:

国家自然科学基金项目(52178218, 52150710542)。

详细信息

作者简介:
张霄杰,博士研究生,主要从事管道和FRP加固管道结构力学性能分析方面的研究工作。

通讯作者:
陈建飞,讲席教授, 博士生导师,主要从事FRP在土木和海洋工程中的应用研究,chenjf3@sustech.edu.cn。

计量
- 文章访问数: 84
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- 被引次数: 0
出版历程
- 收稿日期: 2023-07-12
- 网络出版日期: 2024-06-24

Bearing Capacity of CFRP-Lined PCCP Under Internal Pressure

1. School of Astronautics, Harbin Institute of Technology, Harbin 150006, China;
2. Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China

摘要

摘要: 在内压作用下,预应力钢筒混凝土管(PCCP)可能发生各结构层失效。在PCCP内壁粘贴碳纤维增强复合材料(CFRP)是常见的修复方法,然而修复PCCP在内压作用下的结构失效机理研究尚不成熟。鉴于此,建立了CFRP内衬加固PCCP在内压作用下的多层圆环模型(MRM)力学模型,推导得到了CFRP内衬加固PCCP在内压作用下管壁径向位移、应力和应变的表达式。该力学模型计算结果与已有试验结果吻合良好,验证了力学模型的正确性。参数分析结果表明:增加钢筒厚度和混凝土管芯厚度可提高PCCP的内压承载力,提升预应力水平可提高PCCP抗开裂能力,增加CFRP厚度可以提高CFRP内衬加固PCCP的内压承载力。
- 预应力钢筒混凝土管 /
- 碳纤维增强复合材料 /
- 多层圆环模型 /
- 内压 /
- 理论分析
Abstract: The prestressed concrete cylinder pipe (PCCP) may fail at each structural layer under internal pressure. Carbon fiber reinforced polymer (CFRP) lining is one of the most commonly used methods for repairing PCCPs. However, the failure mechanism of CFRP-lined PCCP under internal pressure remains to be fully understood. The paper presents a multilayer ring model of CFRP-lined PCCP under internal pressure. Analytical expressions for the radial displacement, stress and strain of CFRP-lined PCCP were obtained. The analytical results were in good agreement with existing experimental results, which verified the accuracy of the model. The parametric study results showed that the bearing capacity of PCCP under internal pressure increased with the increase of steel cylinder thickness and concrete core thickness. In addition, increasing the prestressing level could improve the cracking resistance capacity. The bearing capacity of CFRP-lined PCCP under internal pressure increased with the increase of CFRP thickness.
- prestressed concrete cylinder pipe /
- carbon fiber reinforced polymer /
- multilayer ring model /
- internal pressure /
- theoretical analysis

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参考文献(42)

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