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在ASTM D7205和CSA S806中对高温下CFRP杆的弹性模块计算的比较

Seung-Beom Kang¹, Dae-Hee Kang¹, Wonchang Choi¹

¹Department of Architectural Engineering, Gachon University, Seongnam 13120, Republic of Korea.

|August 14, 2025

概括

这项研究比较了在高温下测试碳纤维增强聚合物 (CFRP) 钢筋的弹性模量的两个标准. 在325°C以下,ASTM标准显示了更稳定的结果,校准模型可以预测CFRP钢筋模块在热下.

科学领域:

材料科学材料科学材料科学
土木工程土木工程是指土木工程.
结构工程结构工程

背景情况:

碳纤维增强聚合物 (CFRP) 钢筋越来越多地用于建筑,因为它们的耐腐蚀性和高强度.
了解CFRP钢筋在高温下的行为对于确保火灾或炎热环境中的结构完整性至关重要.
现有的评估材料属性的标准可能会产生不同的结果,需要进行比较分析.

研究的目的:

用ASTM D7205和CSA S806标准在高温条件下评估和比较CFRP钢筋的弹性模量.
分析两种标准在一系列温度范围内的弹性模量决定的差异.
为了确定可靠的预测模型,用于高温下CFRP钢筋的弹性模量.

主要方法:

在25°C至650°C的温度下,对CFRP铁杆 (直径10mm和13mm) 进行了拉力测试.
样品的准备和测试遵循了ASTM D7205和CSA S806标准中概述的程序.
使用扫描电子显微镜 (SEM) 检查骨折形态和微观结构变化.

主要成果:

ASTM标准从初始线性应力-应变区域计算弹性模量,而CSA标准包括过渡后的部分.
使用ASTM标准进行测试的CFRP铁杆在325°C以下表现出较低的变化系数 (COV),表明性能更稳定.
用实验确定的模量值来评估预测模型,确定平均误差最低的模型.

结论:

标准的选择 (ASTM D7205 vs. CSA S806) 显著影响了CFRP钢筋在高温下确定的弹性模量.
在中度升高的温度下,ASTM标准提供了更一致的结果.
校准的预测模型可以在高温条件下有效估计CFRP钢筋的弹性模量,有助于结构设计和安全评估.

关键词:

在CFRP rebar中,使用CFRP是非常重要的.弹性模块弹性的模块温度升高导致的温度升高.拉力强度拉力强度拉力强度

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