基于灰色理论模型的综合管廊分支口管道震动响应数值模拟

Numerical Simulation of the Vibration Response of the Branch Pipe of the Comprehensive Pipe Gallery based on the Grey Theory Model

综合管廊分支口管道容易受到地震等外来作用力影响,形成管道泄漏,引发安全事故,为此基于灰色理论模型数值模拟综合管廊分支口管道震动响应。根据综合管廊分支口的结构形式及分支口管道震害特性,建立基于灰色理论的GM(1,1)等维新信息模型,通过在GM(1,1)模型中增添最新数据,使自身具备较高预测精准度,实现综合管廊分支口管道变形预测。模拟结果显示:该模型可以有效预测综合管廊分支口管道顶底板位移变形,具备较高预测精准度;不同方向的输入地震波对管道有效应力的影响大小顺序为Z轴>X轴>Y轴;当地震烈度上升到Ⅸ等级时,对综合管廊分支口管道的破坏性特别大。表明该模型可有效模拟不同输入方向地震波、不同地震烈度等级对综合管廊分支口管道的震动响应。

The pipeline at the branch of the comprehensive pipe gallery is easy to be affected by external forces such as earthquake, resulting in pipeline leakage and safety accidents. Therefore, the vibration response of the pipeline at the branch of the comprehensive pipe gallery is simulated based on the grey theory model. According to the structural form and seismic damage characteristics of the branch of the comprehensive pipe gallery, a GM(1,1) and other new information model based on the grey theory is established. By adding the latest data to the GM(1,1) model, the prediction accuracy of the branch of the comprehensive pipe gallery is high, and the deformation prediction of the branch of the comprehensive pipe gallery is realized. The simulation results show that the model can effectively predict the displacement deformation of the top and bottom plate of the branch pipe of the comprehensive pipe gallery, with high prediction accuracy;the order of the influence of the input seismic wave in different directions on the effective stress of the pipeline is Z axis > X axis > Y axis;when the seismic intensity rises to IX level, the damage to the branch pipe of the comprehensive pipe gallery is particularly large. The results show that the model can effectively simulate the response of seismic waves in different input directions and different seismic intensity levels to the pipeline at the branch of the comprehensive pipe gallery.