摘要
为充分认识胶凝砂砾石(CSG)材料的动力学特性,更好地揭示其动态本构关系,基于经典Preisach-Mayergoyz(PM)细观滞回模型,结合CSG材料的非线性滞后特性,计入塑性残余应变和循环次数的影响,建立了CSG材料的细观滞回模型.将改进后的模型与试验滞回曲线进行对比分析后可知,该模型不仅可以反映CSG材料在循环荷载下的非线性滞后特征,还可以预测循环荷载下CSG材料的疲劳寿命.
In order to fully understand the dynamic characteristics of cemented sand and gravel(CSG)material and reveal its dynamic constitutive relationship better,based on the classical Preisach Mayergoyz(PM)mesoscopic hysteretic model,combined with the nonlinear hysteresis characteristic of CSG material,considering the influence of plastic residual strain and cycle number,the elastic-plastic mesoscopic hysteretic model of CSG material was obtained.By comparing the hysteretic curve of the improved mesoscopic model with the test curve,it can be seen that this model can reflect the hysteretic characteristics of the CSG material,and the fatigue life of CSG material under cyclic load can be predicted by the model.
作者
黄虎
李坡
张献才
HUANG Hu;LI Po;ZHANG Xiancai(College of Water Resources,North China University of Water Conservancy and Hydroelectric Power,Zhengzhou 450045,China;Henan Provincial Hydraulic Structure Safety Engineering Research Center,North China University of Water Conservancy and Hydroelectric Power,Zhengzhou 450045,China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2021年第2期254-259,共6页
Journal of Building Materials
基金
国家重点研发计划(2018YFC0406800)
河南省科技攻关项目(192102310224)
河南省高等学校重点科研项目(20B570001)。
关键词
胶凝砂砾石材料
滞回曲线
细观滞回模型
疲劳寿命
cemented sand and gravel material
hysteretic curve
mesoscopic hysteretic model
fatigue life
