摘要
在人工气候和自然气候环境下,开展环境温度与混凝土内温度的监测试验,得到自然气候环境下混凝土内温度的响应规律。基于混凝土内温度响应的滞后规律,并采用极差分割的数学方法,提出对波动变化的自然环境温度的处理方法,进而构筑成自然环境的温度作用谱;最后,基于温度作用谱,并利用混凝土微环境温度响应预计模型,得到混凝土内温度响应谱。试验结果表明:与人工气候环境相比,自然环境温度随时间发生周期性和非周期性波动,混凝土内温度响应与气候环境温度之间存在时间上和数值上的滞后效应;混凝土内温度响应谱与自然环境下实测的混凝土内温度响应具有较好的一致性。
The temperature both in environment and concrete was monitored in the artificial climate and natural climate conditions,and the response laws of temperature in concrete in the climate environments were obtained.A simplified processing method for fluctuating natural environment temperature data was presented based on the hysteretic laws of the temperature response in concrete and using mathematical method of extreme difference dividing;and then action spectrum of the temperature in natural climate environment was built.Finally,the temperature response spectrum in concrete was obtained based on the action spectrum of temperature and using the prediction model for temperature response in concrete microenvironment.The results show that,compared with the artificial climate environment,the temperature in natural environment fluctuates periodically and non-periodically with time,and there are hysteresis effects both in time and numerical values between the temperature response in concrete and the ambient temperature.The temperature response spectrum in concrete and the measured temperature response in concrete in natural environment show some consistency.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第5期1923-1930,共8页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(50538070
50878207)
关键词
自然环境
混凝土
温度
作用谱
响应谱
natural environment
concrete
temperature
action spectrum
response spectrum
