复合材料科学与工程 ›› 2026, Vol. 0 ›› Issue (2): 49-57.DOI: 10.19936/j.cnki.2096-8000.20260228.007

• 基础与力学性能研究 • 上一篇    下一篇

高温下CFRP筋横向压缩性能试验研究

王力晨1,2,3, 刘缘园3   

  1. 1.天津大学 中国地震局地震工程综合模拟与城乡抗震韧性重点实验室,天津 300350;
    2.天津大学 滨海土木工程结构与安全教育部重点实验室,天津 300350;
    3.天津大学 建筑工程学院,天津 300350
  • 收稿日期:2024-11-29 出版日期:2026-02-28 发布日期:2026-03-12
  • 作者简介:王力晨(1988—),男,博士,副研究员,研究方向为CFRP索屋盖结构应用,wanglc@tju.edu.cn。
  • 基金资助:
    国家自然科学基金(52008291)

Transverse compressive mechanical tests of CFRP tendons at elevated temperature

WANG Lichen1,2,3, LIU Yuanyuan3   

  1. 1. Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration, Tianjin University, Tianjin 300350, China;
    2. Key Laboratory of Coastal Civil Engineering Structure and Safety, Ministry of Education, Tianjin University, Tianjin 300350, China;
    3. School of Civil Engineering, Tianjin University, Tianjin 300350, China
  • Received:2024-11-29 Online:2026-02-28 Published:2026-03-12

摘要: 为提升使用碳纤维增强复合材料(Carbon Fiber Reinforced Polymer,CFRP)制作拉索的索屋盖结构节点处的耐高温性能,对CFRP筋夹片式锚固系统进行了研究。首先通过CFRP筋的玻璃化转变温度试验,得到了CFRP筋发生玻璃化转变的起始和终止温度(126 ℃、192 ℃),确定了高温下横向压缩力学试验的目标测试温度,然后采用A6061-T6铝合金制作带有半圆形凹槽的两块相同的铝板来模拟锚固系统中的夹片。通过开展试验得到了考虑铝板影响后的CFRP筋的高温下横向压缩力学性能和变形特征随温度的变化规律,这一结果可以为构建CFRP筋的高温下本构模型提供数据支撑。通过建立与试验相对应的有限元模型进行结果吻合度对比,计算得到的应变值与试验得到的应变值平均误差不超过5%,验证了有限元模型中热学参数、力学参数的有效性,可用于后续构建锚固系统的耐高温分析模型。

关键词: 碳纤维增强复合材料筋, 横向压缩, 高温力学性能, 锚固系统, 有限元模型, 折减系数

Abstract: To improve the high temperature resistance of joints in cable roof structures made of carbon fiber reinforced polymer (CFRP), the CFRP tendon wedge-type anchorage system was studied. Firstly, the glass transition temperature test of CFRP tendons was carried out to obtain the starting and ending temperatures of the glass transition of CFRP tendons (126 ℃, 192 ℃). Based on this, the target test temperature for the transverse compressive mechanical test at elevated temperature was further worked out. Then, the same two aluminum plates with semicircular grooving were made of A6061-T6 aluminum alloy to simulate the wedge in the anchoring system. By conducting experiments, the transverse compressive mechanical properties and deformation characteristics of CFRP tendons with the influence of aluminum plate are obtained under high temperature. The results can provide data support for the construction of the constitutive model of CFRP tendons under high temperature. By establishing the finite element model corresponding to the test, the average error between the calculated strain value and the strain value obtained by the test is less than 5%, the validity of thermal and mechanical parameters in the finite element model is demonstrated, and the anchorage system model can be further constructed for high-temperature analysis.

Key words: CFRP tendon, transverse compression, high-temperature mechanical properties, anchorage system, finite element model, reduction factor

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