摘要
混凝土疲劳损伤的计算方法比较复杂,本文经推导及实验验证得出了混凝土的割线模量损伤与塑性应变呈直线关系,同时证明了使用切线模量与割线模量计算得到的损伤是相同的,由此定义了随塑性应变而变化的混凝土弹性模量的疲劳损伤指标为简单的直线方程。将此损伤指标应用于混凝土梁,推导了疲劳荷载下弯曲损伤指标。
The existing computational methods for concrete fatigue damage are generally complex.Summarizing research results,a linear relation between damage of concrete secant modulus and plastic strain is obtained.And the damage gets identical by either tangent modulus or secant modulus.A damage index for concrete elastic modulus varying with plastic strain is established to derive a damage index expression for concrete beam.
出处
《应用力学学报》
CAS
CSCD
北大核心
2009年第1期71-75,共5页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(50478077)
关键词
损伤指标
疲劳荷载
混凝土
damage index,fatigue loading,concrete
