摘要
提出一种使用混凝土破坏前的应力应变发展曲线,来推求混凝土抗压强度和峰值应变的方法.经过试验验证,该方法具有较高的精度,并可以得到疲劳试验时真实的应力水平.在MTS 810 TestStar材料试验系统上对C15水工混凝土开展了受压疲劳试验.通过试验数据分析,得到疲劳残余应变发展规律公式、疲劳失稳判据、疲劳寿命估算式及疲劳强度等,对水工建筑物的疲劳损伤分析与评定具有指导意义.
A method is proposed to obtain the compression strength and the peak strain of concrete by using the stress-strain curve before failure.The tests show that this method enjoys a good accuracy,and can be used to obtain the objective fatigue testing stress level.The compressive fatigue tests for hydro-concrete C15 were performed by using the MTS 810 TestStar material test system.By analyzing the results of this fatigue test, the evolution of the fatigue residual deformation,the criterion of fatigue failure,are obtained,together with an estimating formula for fatigue life and fatigue strength.
出处
《力学与实践》
CSCD
北大核心
2011年第4期29-32,共4页
Mechanics in Engineering
基金
国家自然科学基金(51009074)
云南省应用基础研究计划(2008ZC028M)资助项目
关键词
疲劳
水工混凝土
抗压强度推测
残余应变
疲劳强度
fatigue
hydraulic concrete
compression strength extrapolation
residual strain
fatigue strength
