混凝土变形模量和泊松比的动态测试研究  

DYNAMIC TEST STUDY OF DEFORMATION MODULUS AND POISSON RATIO OF CONCRETE

作　　者：王正[1] 王韵璐 曹瑜[1] 李敏敏[1] 高子震[1] 

机构地区：[1]南京林业大学材料科学与工程学院,南京210037

出　　处：《工业建筑》2017年第1期84-88,共5页Industrial Construction

基　　金：江苏省高校优势学科建设工程项目资助(PAPD)

摘　　要：根据自由板一阶扭转振型,应用能量法导出了混凝土剪切模量与自由板一阶扭转频率的关系式。给出了混凝土弹性模量和自由板一阶弯曲频率关系式。说明了根据悬臂板一阶弯曲振型测试混凝土泊松比的原理和方法,并用稳态正弦激励测试了混凝土的泊松比。对于抗压强度为22.6 MPa的混凝土,用瞬态激励实测了混凝土变形模量、用稳态正弦激励测试了泊松比。结论表明:实测的混凝土E、G和μ之间近似满足E=2G(1+μ)关系;实测的剪切模量与弹性模量之比为0.405。In the work, energy method was used to derive correlation between concrete shear modulus and first-order torsional frequency of free board based on first-order torsional vibration modal. Then the relation between elastic modulus of concrete and first-order bend frequency of free board was got. The testing method of concrete Poisson ratio by first-order bend modal shape of cantilever board was described, and Poisson＇s ratio was tested by steady state sine excitation. For the concrete with compressive strength of 22.6 MPa, transient excitation was used to test elastic modulus and shear modulus of concrete; steady state sine excitation was used to test Poisson＇s ratio. The results showed that the measured E,G and μ of concrete accord with the relation E = 2G（ 1 ＋μ） ; the ratio of measured shear and elastic modulus was 0.405.

关 键 词：弹性模量 剪切模量 泊松比 测试 频率 振型 

分 类 号：TU528[建筑科学—建筑技术科学]