混凝土结构时间多尺度环境作用研究

Temporal Multi scale Environmental Actions for Concrete Structures

摘要:

不考虑环境作用在时间和空间上的相关性，以确定环境作用代表值的“时间计算尺度”和环境作用的时变规律为特征，以引起混凝土碳化的环境作用为例，对环境作用（主要为大气温度、相对湿度）的时间特性进行了详细分析.结果表明，可以采用“年均”计算尺度或修正后的“年均”计算尺度计算引起混凝土结构碳化的环境作用代表值；采用HoltWinters模型可以较准确地描述环境作用的时变规律.确定了合适的时间计算尺度和环境作用的时变规律，可以更加方便地预测混凝土结构的碳化深度.

Abstract:

Without considering the correlation in time and space for environmental actions, the features of time of environmental actions such as temperature and relative humidity were analyzed in detail on the basis of the characteristics of the “time calculation scale” for the representative value of environmental actions and the variation of environmental actions with time as well as an example about the carbonation of concrete due to the main environmental actions. It was found that the mean annual value and the adjusted mean annual value can be regarded as the representative value of environmental actions for the calculation of carbonation of concrete, and the Holt Winters method can be used to describe the variation of the environmental actions well. Determining the appropriate “time calculation scale” and the variation of environmental actions with time, the carbonation depth of concrete structures can be predicted easily and precisely.