混凝土结构空间多尺度相对湿度值

针对环境作用具有空间分布特性,借鉴空间多尺度环境作用模型框架(包括全局环境、地区环境、工程环境、构件表面环境、内部环境)及其数学模型,对相对湿度进行了空间多尺度研究：在分析空间各尺度上相对湿度的不同影响因素的基础上,由全局环境尺度开始,通过地区环境尺度、工程环境尺度以及构件表面环境尺度上环境因素的逐步调整,最终计算得到混凝土内部的相对湿度值。研究结果表明,采用“常规统计模型+空间残差”的方法,可有效建立地区环境尺度上的相对湿度值与工程环境尺度上相对湿度值的定量关系;混凝土结构构件的表面相对湿度与表面温度有关;实际工程结构应考虑构件表面相对湿度与内部相对湿度之间的不同。

Spatial Multi-scale Relative Humidity Values for Concrete Structures

According to the spatial features of environmental actions, on the basis of the spatial multi-scale model framework (including the global environment, regional environment, engineering environment, surface environment and internal environment of concrete) and the mathematic model for environmental actions, the spatial multi-scale relative humidity values for concrete structures were studied. That is, based on the influential factors of relative humidity on the different spatial scales, the relative humidity values in concrete were deduced by adjustment step by step from the values on the global environment to the regional environment, the engineering environment and the surface environment of concrete. It was found that using the superposition method of conventional statistic model and spatial residual error, the quantitive relationship of relative humidity values in the regional environmental scale and the engineering environmental scale can be established effectively. Moreover, the relative humidity values on the surface of concrete structural elements are related with the temperature values on the surface of concrete structural elements, and the difference of relative humidity values between the surface and the inner part of concrete should be considered in the durability assessment of concrete structures.