硫酸盐侵蚀环境下基于B3模型的混凝土抗压强度时效分析  

Time-effect Analysis of Concrete Compressive Strength Based on the B3 Model under Sulphate Attack

作　　者：贺志远[1] 滕海文[1,2] 赵卓[3] 李晖[1] 

机构地区：[1]北京工业大学土木工程系,北京100124 [2]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100124 [3]郑州大学土木工程系,郑州450001

出　　处：《结构工程师》2013年第3期44-48,共5页Structural Engineers

基　　金：国家自然科学基金资助项目(51078334);北京市自然科学基金重大项目(8100001)

摘　　要：基于B3模型,建立了持续荷载下混凝土抗压强度的时效模型。通过考虑持续荷载和硫酸盐共同作用对混凝土截面有效应力的影响,建立了持续荷载和硫酸盐共同作用下混凝土抗压强度的时效模型。经分析,持续荷载和环境因素是影响混凝土抗压强度时效水平主要的因素,而混凝土强度等级对强度时效水平的影响较小。Based on the B3 model of concrete creep and shrinkage, this paper established the time-effect model of concrete compressive strength under sustained load. By considering effects of sustained load and sul- phate attack on the section effective stress, the paper further developed the time-effect model of concrete com- pressive strength under sustained load and sulphate attack. Based on analysis, the sustained load and environ- ment are the main factors that affect the time-variation of concrete compressive strength ; and the strength grade of concrete has little influence on the time-variation of concrete compressive strength.

关 键 词：混凝土 硫酸盐侵蚀 抗压强度 时效分析 B3模型 

分 类 号：TU375[建筑科学—结构工程]