%0 Journal Article
%T 活性粉末混凝土力学特性及疲劳寿命研究<br>Study on mechanical properties and fatigue life of reactive powder concrete
%A 姚志雄
%A &lt
%A br&gt
%A YAO Zhixiong
%J 铁道科学与工程学报
%D 2016
%X 根据活性粉末混凝土密实配合比设计原理,结合福建当地材料制备3个系列混凝土试件,研究不同纤维品种、掺量对RPC基本力学性能的影响规律,并采用Instron电液伺服式疲劳试验得到纤维增强RPC疲劳寿命发展情况及分布规律。掺入聚丙烯纤维对RPC抗压强度、劈裂强度、弯折强度及延性具有一定程度提升,但效果不明显。钢纤维掺量对RPC强度具有较明显增强效果,抗压强度随掺量呈抛物线增长规律;劈裂、弯折强度随钢纤维掺量呈线性及指数增长趋势。RPC平均疲劳寿命随聚丙烯纤维掺量呈抛物线增长规律,随钢纤维掺量呈明显递增趋势。分析给出各力学指标随2种纤维掺量的回归关系式。统计分析各系列试件的疲劳试验数据,RPC弯曲疲劳寿命与对应的概率函数线性相关显著,服从两参数威布尔分布,计算给出存活率-疲劳寿命曲线。<br>According to the dense proportion principle of RPC, three series of concrete specimens were prepared with Fujian local materials. The influence law of different fiber types on basic mechanical properties of RPC was studied. The bending fatigue tests were performed using the Instron electro-hydraulic servo fatigue testing machine to get the development and distribution law of fatigue life of fiber reinforced RPC. Results show the incorporation of polypropylene fiber for RPC has a certain degree of improvement on compressive strength, splitting strength, bending strength and ductility, but the promoting effect is not so obvious. Steel fiber content has obvious enhancement on RPC strength. Compressive strength with the steel fiber content is the parabola growth law, splitting tensile strength and bending strength with the content are linear growth and exponential growth trend respectively. The average fatigue life with the polypropylene fiber is the parabola law, with the steel fiber content is significantly increasing trend. The regression relations of mechanical indexes with two kinds of fiber content are given。Statistical analysis on fatigue test data of each serials of specimen indicates that bending fatigue life of RPC is in linear correlation with the corresponding probability significantly, and obeys the two-parameter weibull distribution. The survival-fatigue life curve was also given
%K 活性粉末混凝土
%K 纤维增强
%K 基本力学性能
%K 弯曲疲劳寿命
%K 威布尔分布&lt
%K br&gt
%K reactive powder concrete
%K fiber reinforced
%K basic mechanical properties
%K bending fatigue life
%K weibull distribution
%U http://www.jrse.cn/paper/paperView.aspx?id=paper_311922