加卸载响应比理论在隧道结构抗震稳定性评价中的应用
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摘要
根据加卸载响应比可以定量刻划非线性系统偏离稳态程度这一特征,探讨了加卸载响应比理论在隧道结构抗震稳定性评价中的应用,确定了隧道地震响应比参数及响应区段;以隧道地震LURR值的发展形态和趋势为依据,将隧道周边位移的地震响应分为稳定变形、等速变形及加速变形3种稳定形态.
According to the characteristic which the loading-unloading response ratio(LURR) can quantitatively describe the degree of nonlinear systems deviating from the steady state,the application of the loading-unloading response ratio theory to the aseismic stability evaluation of tunnels was discussed,and the seismic response ratio parameters and response sections of the tunnel were determined.Based on the development patterns and trends of seismic LURR values,the seismic response of displacements around the tunnel was divided into three stable forms,namely stable deformation,constant velocity deformation and acceleration deformation.
According to the characteristic which the loading-unloading response ratio(LURR) can quantitatively describe the degree of nonlinear systems deviating from the steady state,the application of the loading-unloading response ratio theory to the aseismic stability evaluation of tunnels was discussed,and the seismic response ratio parameters and response sections of the tunnel were determined.Based on the development patterns and trends of seismic LURR values,the seismic response of displacements around the tunnel was divided into three stable forms,namely stable deformation,constant velocity deformation and acceleration deformation.
引文
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[2]尹祥础,尹灿.非线性系统失稳的前兆与地震预报-响应比理论及其应用[J].中国科学,1991,B(5):512-518.
[3]姜彤,马莎,许兵,等.边坡在地震作用下的加卸载响应规律研究[J].岩石力学与工程学报,2004,23(22):3803-3807.
[4]许强,黄润秋.用加卸载响应比理论探讨斜坡失稳前兆[J].中国地质灾害与防治学报,1995,6(2):25-30.
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