摘要
首次对混凝土在侧压分别为0.25fc和0.50fc作用下进行了受拉疲劳试验,得到了S-N方程,应力应变曲线,应变、疲劳变形模量比与循环次数关系曲线.应变、疲劳变形模量比与循环次数关系曲线表现为三阶段规律,通过定义的对数线性变换把上述三阶段曲线转换为直线,并利用了应变与循环次数关系第二阶段稳定变化的规律,对疲劳寿命进行了预测.
The tensile fatigue of concrete under a lateral pressure of 0.25f_c and 0.50f_c is achieved respectively, and some S-N equations, curves of stress-strain, relation between strain, the ratios of deformation modulus and the number of cycles which obeys three-stage rules are got accordingly. The three-stage curves are transformed beelines by defined logarithmic linear transformation ε_t, e_(tm) respectively. The fatigue life of concrete with the strain increasing rate of the second stage curves is forecasted in the end.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2004年第1期91-95,共5页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(50078010).
关键词
侧压
混凝土
受拉
疲劳试验
二轴应力
对数线性变换
concrete
fatigue
biaxial stress
lateral pressure
tension
logarithmic linear transformation
