The temperature and shrinkage stress of concrete are influenced by various factors,and sensitive parameters will undergo transformation with changes in component size and pouring age.In the theoretical calculation,numerical analysis,and crack control technology of concrete temperature and shrinkage cracks,if the sensitive parameters are not judged properly,the analysis results obtained will have a large deviation,and the formulated crack control technology is difficult to be targeted.The concept of dominant constraint is put forward in this paper.When two or more constraints exist at the same time,the maximum tensile stress is basically determined by the dominant constraint,and the sensitive parameter exists in the relevant parameters of the dominant constraint.A concrete component model was established based on three different constraint forms:material composition,temperature gradient,and external constraints.The sensitive characteristics of each parameter value under different constraints were analyzed through finite element numerical calculation,and the sensitive parameters of temperature shrinkage stress in common concrete components were obtained.On this basis,combined with parameter values and range of variation,a screening method for the sensitive parameters affecting the temperature shrinkage stress of common concrete components was formed.
concrete componenttemperature and shrinkage stresscalculationconstraintsensitive parameters
万方数据
维普
