摘要
基于预应力混凝土受弯构件冻融与疲劳交替试验,建立考虑冻融影响的混凝土抗压疲劳剩余强度概率密度模型。通过试验数据进行参数估计与假设检验,验证得出冻融循环后的混凝土抗压疲劳剩余强度仍然服从三参数Weibull分布。研究发现,冻融循环加剧了混凝土抗压疲劳剩余强度的离散性,引入冻融影响因子可表征冻融循环对混凝土抗压疲劳剩余强度分布参数的影响。
The probability density function model of concrete fatigue residual strength which considering frost damage is established based on fatigue and freeze-thaw alternative experiment of PC beams. By hypothesis testing, it is justified that the fatigue residual strength of concrete which subjected to fatigue loading and freeze-thaw cyeles（FTCs） is still subjected to 3-parameter Weibull distribution. The study results show that FTCs will aggravate the discreteness of fatigue residual strength. So FTCs factors must be introduced into the parameters to represent the influence of FTCs.
出处
《混凝土与水泥制品》
2017年第5期30-35,共6页
China Concrete and Cement Products
基金
住建部科技计划资助项目(2003-k4-26)
