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：
利用FLAC^3D初步分析了地震荷载作用下地震波振幅、频率及持续时间对地下岩体洞室位移特征的影响。分析结果表明，在地震荷载作用下，洞室位移随振幅以及持续时间的增大而增大，但随着频率的增大而减小，变化幅度随埋深和侧压系数的增加而减小。分析结果还表明，浅埋情况下，可能存在导致岩体洞室变形破坏的地震烈度门槛值，当地震烈度超过门槛值时，洞室位移值随振幅的增大呈陡变性增加趋势；同时，地震的长周期（低频率）特征对洞室的位移影响显著。低频地震波导致的洞室位移幅值明显高于高频地震波。
英文摘要：
The influences of earthquake amplitudes, frequency and duration time on the different rock cavern displacements are primarily studied by using FLAC^3D. It is found that the displacements of rock cavern clearly increase with the increasing earthquake amplitudes and duration time as well as the decreasing frequency. The changing rates of displacements with the above earthquake parameters decrease with the increasing overburden and in-situ lateral coefficient （2）. It is also indicated that under shallow overburden, the threshold earthquake intensity probably exists. When the earthquake intensity reaches up to the threshold value, the cavern displacements significantly increase with the increasing earthquake amplitudes. In addition, it is revealed that the low frequency properties of earthquake have clear influence on the cavern displacement, and the cavern displacement under earthquake with low frequency is obviously larger than that at high frequency.
位置：
同期刊论文项目
