再生混凝土的CEB-FIP 90徐变预测模型修正  

Modification of CEB-FIP 90 Creep Prediction Model Based on Recycled Aggregate Concrete

作　　者：黄海生 崔亚辉 吴智明 HUANG Haisheng;CUI Yahui;WU Zhiming(School of Civil Engineering, Putian University, Putian Fujian 351100, China;Fujian Ju＇an Construction Engineering Co. , Ltd. , Putian Fujian 351100, China)

机构地区：[1]莆田学院土木工程学院,福建莆田351100 [2]福建巨岸建设工程有限公司,福建莆田351100

出　　处：《莆田学院学报》2018年第2期83-88,93,共7页Journal of putian University

基　　金：福建省教育厅科技项目(JAT170508);东南沿海工程结构防灾减灾福建省高校研究中心项目(JDGC03)

摘　　要：从国内外收集再生混凝土徐变试验数据,建立包含42条实测曲线共775个数据点的再生混凝土徐变试验数据库。使用残差法和CEB变异系数法评估CEB-FIP 90模型计算再生混凝土徐变试验数据的准确度。在对再生混凝土徐变试验数据进行统计回归分析的基础上,通过修改混凝土强度影响系数和徐变随持荷时间发展指数对CEB-FIP 90模型进行了修正,采用残差法和CEB变异系数法对修正后的模型进行了评价和验证。经统计分析表明,修正后的CEB-FIP 90模型预测再生混凝土徐变的准确度优于原有的CEB-FIP 90模型。Through collecting recycled concrete creep test data from domestic and abroad, a database of recycled concrete creep test with 42 measured curves and 775 data points is established. The accuracy of the CEB-FIP 90 model which is used to calculate the creep test of recycled aggregate concrete is evaluated by the residual method and the CEB coefficient of variation method. Based on statistical regression analysis of the creep test data of recycled aggregate concrete, the CEB-FIP 90 model is revised by modifying the influencing coefficients of the concrete strength and the time development exponentials of creep. The modified model is evaluated and verified by the residual method and the CEB coefficient of variation method. The statistical analysis shows that the modified CEB-FIP 90 model performs better than the original CEB-FIP 90 model in predicting the creep accuracy of recycled concrete.

关 键 词：再生混凝土 徐变 预测模型 残差法 CEB变异系数法 

分 类 号：TU528.0[建筑科学—建筑技术科学]