基于短期试验的桥梁混凝土长期徐变预测研究

Prediction Research of Long-term Creep for Bridge Concrete Based on Short-term Test

结合BP-KX模型徐变思想,给出了从混凝土短期试验值推算相应素混凝土在该桥梁工作环境下长期徐变系数的方法,通过对短期试验数据的线性回归得出桥梁素混凝土徐变系数的BP-KX模型修正公式。回归分析结果及试验数据与各国规范预测模型比较表明,回归曲线预测理论值与实测值吻合良好。

With the concept of BP-KX model for creep,a modified formula for computing creep coefficient of concrete bridge was obtained form short-term test data through linear regression approach.Comparisons among the regression analysis,test results and commonly-used prediction models for concrete creep in specifications showed that the predicted value by regression fitted in well with the test results.