CAJ | 학술논문

采用理论分析、数值模拟和实验室测试对不同锚固质量锚杆中的应力波在锚固段的传播速度进行分析.模拟试验中采用不同龄期的混凝土模拟不同锚固强度,数值模拟中通过改变弹性模量和泊松比实现改变锚固强度.数值模拟和试验模拟结果定性吻合;都显示锚杆中锚固段的应力波波速(固结波速)和锚固介质的强度直接相关,固结波速和锚固介质强度之间成抛物线关系.起初固结波速随锚固介质强度的增加而减少,到达最底点后随着锚固介质强度的增加而增加.用数值模拟结果对产生这种现象的本质原因进行分析讨论.模拟显示固结波速随锚固介质强度的变化是由锚杆中的P波以及锚杆和锚固介质界面处产生的界面波此消彼长而引起的.
채용이론분석、수치모의화실험실측시대불동묘고질량묘간중적응력파재묘고단적전파속도진행분석.모의시험중채용불동령기적혼응토모의불동묘고강도,수치모의중통과개변탄성모량화박송비실현개변묘고강도.수치모의화시험모의결과정성문합;도현시묘간중묘고단적응력파파속(고결파속)화묘고개질적강도직접상관,고결파속화묘고개질강도지간성포물선관계.기초고결파속수묘고개질강도적증가이감소,도체최저점후수착묘고개질강도적증가이증가.용수치모의결과대산생저충현상적본질원인진행분석토론.모의현시고결파속수묘고개질강도적변화시유묘간중적P파이급묘간화묘고개질계면처산생적계면파차소피장이인기적.
Theoretical analysis,numerical simulation and experimental testing are used to study the velocity of consolidation wave in grouted rock bolt with different anchoring qualities. Fresh concrete with different ages is used to simulate different anchoring strengths in experimental testing. In the numerical simulation,various values of elastic modulus and Poisson ratio are used to simulate different anchoring qualities. Numerical simulation results agree with experimental results,both of which show that velocity of consolidation wave in grouted rock bolt are related to the anchoring strength of fresh concrete. At lower strength of fresh concrete,the velocity of consolidation wave decreases with the increase of strength;at higher strength,the velocity of consolidation wave increases with the increase of the strength. The essence of the phenomena is explained with numerical simulation,which shows that the changes are brought by the P wave and fluctuation of interfacial wave <http://dict.cnki.net/dict_result.aspx?searchword=%e7%95%8c%e9%9d%a2%e6%b3%a2&tjType=sentence&style=&t=interfacial+wave> of the bolt and grouted medium.