摘要
为了研究温度和加载速率对碳纤维沥青混凝土力学性能变化的影响,进行不同温度和速率下小梁弯曲和单轴压缩试验,揭示不同环境条件下碳纤维沥青混凝土的小梁弯曲和单轴压缩应力-应变关系。试验结果表明:当温度从20℃降低至-20℃且加载速率为1.67 mm/min时,抗弯拉强度变化区间为1.30~11.10 MPa;在速率为1 mm/min时,抗压强度从2.41 MPa增加到31.10 MPa。可以看出:速率相同时,温度对碳纤维沥青混凝土的抗弯拉强度和抗压强度影响较大。当温度为20℃,加载速率从1.67 mm/min增加至16.7 mm/min时,抗弯拉强度从1.03 MPa增加至2.5 MPa;速率从1 mm/min增加到10 mm/min时,抗压强度从2.41 MPa增加到3.81 MPa。在相同温度下,抗弯拉强度和抗压强度都随着速率增加,但其增长较缓慢。分析试验数据得到同一温度和速率下碳纤维沥青混凝土抗弯拉强度和抗压强度之间的关系式。
Trabecular bending and uniaxial compression tests of carbon fiber-reinforced asphalt concrete are carried out under different temperatures and different loading rates to study their effects on the mechanical properties,focusing on the stress-strain behavior of trabecular bending and uniaxial compression under different environmental conditions.The test results show that at a temperature as low as-20℃and a loading rate of 1.67 mm/min,flexural tensile strength varies between 1.30 and 11.10 MPa;at the rate of 1 mm/min,compressive strength increases from 2.41 to 31.10 MPa.We have observed that at the same loading rate,temperature has a great influence on flexural tensile strength and compressive strength.When the temperature is fixed at 20℃,flexural tensile strength increases from 1.03 to 2.50 MPa as the loading rate increases from 1.67 to 16.7 mm/min,and compressive strength increases from 2.41 to 3.81 MPa as the rate increases from 1 to 10 mm/min.Analysis on the test data of carbon fiber asphalt concrete gives its relationship between flexural tensile strength and compressive strength in the condition of the same temperature and same loading rate.
作者
寇佳亮
任玉婷
李豹
刘云贺
KOU Jiaiang;REN Yuting;LI Bao;LIU Yunhe(State Key Laboratory of Water Engineering Ecology and Environment in Arid Area,Xi'an University of Technology,Xi'an 710048,China;School of Civil and Architectural Engineering,Xi'an University of Technology,Xi'an 710048,China)
出处
《水力发电学报》
北大核心
2025年第8期44-56,共13页
Journal of Hydroelectric Engineering
基金
国家自然科学基金资助项目(52039008)
陕西省自然科学基础研究计划(2024JC-YBMS-425)。
关键词
碳纤维沥青混凝土
加载速率
低温硬化
弯曲性质
carbon fiber-reinforced asphalt concrete
loading rate
low temperature hardening
bending behavior
