中文摘要：

探讨自然环境中空气湿度变化和混凝土内湿度响应规律，基于饱和水汽压方程分析环境湿度采用相对湿度和水汽密度形式表达间的差异。通过理论推导建立自然环境湿度变化谱和混凝土内湿度响应谱模型，并采用试验验证模型的合理性；此外，还基于历年气象资料构筑出相应的湿度变化谱图，并探讨湿度变化与天气间的关联。试验结果表明：自然环境与混凝土内湿度采用相对湿度和水汽密度形式表达结果差别显著。自然环境湿度若采用相对湿度形式描述则表现为周期性波动，但其若采用水汽密度形式表征则其值基本恒定；混凝土内相对湿度若采用相对湿度形式表征则其值基本恒定，而其若采用水汽密度形式表征则表现为周期性波动。基于历年气象资料所构筑出的自然环境湿度作用谱可表征环境湿度变化规律，这为构筑典型环境湿度作用谱和混凝土内响应谱提供新途径。

英文摘要：

The changes of air humidity in the natural environment and the response laws of concrete humidity were studied. Based on the saturation vapor pressure equation, the differences of the environmental humidity expressed both with the relative humidity and the water vapor density were analyzed. The models of natural environment humidity variations and the concrete humidity response spectrums were established by theoretical derivation, and the rationality of the models was verified by the test. Furthermore, the humidity spectrum was framed based on the meteorological data in past years, and the relation between humidity variations and the water vapor density was investigated. The results show that the expressions of the environmental and concrete humidity expressed by the relative humidity and water vapor density are significantly different. The relative humidity of the natural environment periodically changes with time, however the water vapor density value is constant. On the contrary, the response spectrum of the concrete relative humidity is constant, but the water vapor density changes periodically with time. The humidity action spectrum obtained from the meteorological data can then be used to describe the law of the humidity variations, which provides a new way to frame the environment humidity action spectrum and response spectrum in concrete.