混凝土收缩徐变参数影响分析

影响混凝土收缩徐变的因素很多,主要有环境湿度、混凝土强度、混凝土理论厚度、初始加载龄期等。本文以一钢筋混凝土柱为算例,采用ANSYS进行参数分析,研究以上主要因素对混凝土收缩徐变的影响。并采用正交试验设计方法,分析混凝土收缩徐变受各因素影响的敏感性。结果表明,环境湿度是影响混凝土收缩徐变的最主要因素,其次是加载龄期,然后是混凝土强度,最后是理论厚度。

Analysis of Parametric Influences on Concrete Shrinkage and Creep

Concrete shrinkage and creep can be affected by many factors, including environmental humidity, concrete strength, theoretical thickness, loading age, etc.This paper takes a reinforced concrete column as an example, and reports the parameter analysis using ANSYS on it.The effect of various factors on the concrete shrinkage and creep are discussed and studied.Also, an orthogonal experimental design method is used to analyze the sensitivity of different influencing factors on the concrete shrinkage and creep.The result shows that the environmental humidity is the most effective factor influencing the shrinkage and creep, followed by loading age, then concrete strength, the least effective factor is the theoretical thickness.