欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
通过在RMT-150B多功能全自动刚性岩石伺服试验机对取白海南昌江核电厂一期工程常规岛的微风化和中风化黑云母花岗岩进行单轴压缩变形试验和循环加卸载试验，研究花岗岩动应力-动应变曲线滞回特性和动弹性模量与阻尼比同弹性模量之间的规律，并利用广义开尔文流变模型来描述循环荷载下花岗岩的滞回曲线和能量损耗情况。研究结果表明：花岗岩在循环荷载作用下的加卸应力-应变曲线形成滞回环，随着循环数的增加，滞回环向轴向应变增大的方向移动，且越来越密集；花岗岩的滞回环面积和最大弹性应变能都随弹性模量的增加而减少，而动弹性模量则相反，阻尼比先随弹性模量的增大而增大，达到一峰值后，随弹性模量的增大而减少；广义开尔文模型可以较好地描述花岗岩的滞回曲线和能量损耗情况。研究成果对海南昌江核电厂地基的地震反应分析和场地安全性评价有着重要的参考意义。
英文摘要：
The uniaxial compression-deformation test, cyclic loading and unloading tests on slightly weathered and middle differentiation biotite granite comes from the Changjiang of Hainan nuclear power first-stage construction conventional island are performed on the RMT - 150B multi-function automatic rigid rock servo controlled testing machine. The granite hysteretic characteristics of dynamic stress-dynamic strain curves and the law between elastic modulus and dynamic elastic modulus, damping ratio are researched. And the viscoelastic generalized Kelvin rheological model is used to describe granite hysteresis curve and energy loss. The results show that the curves of strain and stress for loading and tmloading are hysteresis loops. With the increase of cyclic number, hysteresis loops move to the direction of axial strain increasing, more and more dense. The areas of hysteresis loop and the maximum elastic strain energy decrease with increase of elastic modulus; however the dynamic elastic modulus is opposite. First, damping ratio increases with increase of elastic modulus; but after reaching its peak value, damping ratio decreases with increase of elastic modulus. The biotite granite hysteretic loop and energy loss can describe well by generalized Kelvin rheological model. The results offer great reference to seismic response analysis and site safety evaluation of the Changjiang nuclear power plant.
同期刊论文项目
同项目期刊论文
期刊信息
位置：