土工格栅层式加筋风积沙的动力性状  

DYNAMIC CHARACTERISTICS OF REINFORCED AEOLIAN SANDS WITH GEOGRID

作　　者：包建强 邢永明[1] 刘霖[1] BAO Jianqiang;XING Yongming;LIU Lin(School of Civii Engineering,Inner Mongolian University of Technology,Hohhot 010051,China;Department of Civit Engineering and Architecture,Hohhot Vocctional College,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学土木工程学院,呼和浩特010051 [2]呼和浩特职业学院建筑工程学院,呼和浩特010051

出　　处：《工业建筑》2019年第11期77-81,107,共6页Industrial Construction

基　　金：国家自然科学基金项目(11362006);内蒙古自治区高等学校科学研究项目(NJZY16452)

摘　　要：:以内蒙古库布齐沙漠的风积沙为填充料,高强合成纤维土工格栅为加筋材料,在不同围压(100,200,300 kPa)下,对风积沙和不同加筋层(1、2、3)的加筋风积沙进行循环荷载作用的动三轴试验&在试验基础上,分析加筋风积沙的动应力-应变关系,探讨动荷载作用下加筋风积沙动模量和阻尼比的变化特征,计算得到不同加筋层数风积沙的最大动弹性模量和阻尼比;进一步分析得到加筋风积沙动弹性模量和阻尼比的拟合模型,并确定出其中的模型参数.Using the aeelian sand in theKubuqi Desest of Innes Mongolia as thefiOingmaterial,and thehighstrength synthetic fiber geogrid as the reinforced material,undec different confiningpressures,thecyclic loading dynamic triaxiai test was carried out on aeelian sand and reinforced aeelian sand with different layers(1,2 and 3 layers)(100,200 and 300 kPa,individually).On the basis of the test results,the relationship between dynamic stress and dynamic strain of reinforced aeelian sand was analyzed,the veriation characteristics of dynamic elastic modulus and damping ratic of reinforced aeelian sand undee cyclic loading were discussed,and the maximum dynamic eiastacmoduius and maiamum dampang eatao ofaeoiaan sand wath dafeeenteeanfoeced iayees weee caicuiated.Furthermore,the fitting modei of dynamic elastic modulus and damping ratic of reinforccd aeelian sand was obtained,and the modei parameters were determined.

关 键 词：加筋风积沙 动三轴试验 动弹性模量 动阻尼比 

分 类 号：TU4[建筑科学—土工工程]