摘要
通过对混凝土冻融损伤特性的分析,混凝土冻融破坏可以用与疲劳问题相类似的方法来分析.混凝土材料特性的离散性,导致在给定损伤量状态下的冻融循环次数是一个随机变量,分析发现它较好地服从三参数Weibull分布.基于三参数Weibull分布模型,在已有试验数据的基础上,建立了冻融环境下混凝土损伤量与冻融循环次数的概率关系曲线,并回归得到不同保证率下冻融循环累积损伤模型.为冻融环境下混凝土寿命预测以及健康诊断提供了参考依据.
An analysis of the cumulative damage characteristics for concrete in freezing-thawing circumstance is found to be analogous to fatigue question.The freezing-thawing cycle number is a random variable for the dispersion of concrete materialis.It obeys 3-parameter Weibull distribution preferably.Based on the 3-parameter Weibull distribution and testing data,curves of concrete in freezing-thawing circumstance are defined to describe probabilistic relationships between damage and freezing-thawing cycle number.And its in various specified survival probabilities could be used to evaluate the damage degree and life prediction of concrete structure.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2010年第3期319-322,328,共5页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金重点项目(50538060)
关键词
混凝土
损伤分析
寿命预测
concrete
analysis damage characteristics
prediction durability life
