PDF
Full
Outline
In order to understand the influence of thermodynamic coupling factors on the damage characteristics of hydraulic engineering concrete materials within 100 ℃, the temperature of concrete specimens is applied and stabilized by self-designed temperature control device, and non-destructive monitoring acoustic emission technology (AE) is used to monitor the uniaxial compression of concrete under different temperature environments. The AE ringing count and amplitude change during concrete failure at five different temperatures are explored, and the constitutive model of concrete damage under thermodynamic coupling is established according to the relationship between ringing count and stress. The results of the cumulative ringing count and amplitude show that the higher the temperature, the higher the number of damage events, the more severe the degree of damage, respectively, the cumulative ringing count increases by 5.25 times at 100 °C compared with 20 °C, and the amplitude can be increased by 20-40 dB in the late loading stage compared with the previous stage. The established damage constitutive model shows that the increase of temperature will increase the degree of damage of concrete, which provides a theoretical reference for understanding the influence of thermodynamic coupling on the damage of concrete materials.
PDF
65
8
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
