(北京工业大学建筑工程学院，北京 100022)

［摘要］通过4个不同初始应力水平的芳纶纤维布应力松弛试验，研究了应力水平对芳纶纤维布应力松弛的影响，提出了芳纶纤维布应力松弛损失的计算公式。试验结果表明：应力持续1 000h后，芳纶纤维布应力松弛损失率约为13.5%；应力松弛主要取决于应力水平，且随应力水平增大而增大；1年后大部分应力松弛发展完成。

［关键词］芳纶纤维布；应力松弛；应力水平

Experimental study on stress relaxation of aramid fiber sheets

Deng Zongcai, Li Jianhui, Zhang Jianjun, Niu Kun, Liu Chunguo

(School of Civil Engineering, Beijing University of Technology, Beijing 100022, China)

Abstract:An experiment about stress relaxation properties of aramid fiber sheets with four different stress levels is conducted, the effects of different stress level on stress relaxation of aramid fiber sheets are researched, and the empirical formula for calculating stress relaxation loss is proposed. The experimental results show that, the stress relaxation loss is about 13.5%of initial tensile stress after 1000h; stress relaxation depends on stress level, the higher the stress level, the larger the stress relaxation loss; a large part of stress relaxation loss is developed after one year.

Keywords:aramid fiber sheets; stress relaxation; stress level

*北京市教委项目(KM200610005007)，北京市自然科学基金重点项目(8051001)。

作者简介：邓宗才，博士，教授，Email:dengzc@bjut.edu.cn。