地下管网地震反应分析模型
|
摘要
建立了多点地震动激励作用下的地下管网地震反应拟静力分析模型。首先建立基于有限单元模型的地下管网系统刚度方程,接着给出考虑地震动空间相关性及场地条件等诸多因素的地震动场模拟思路及管网系统地震动施加策略,最后通过解析法验证了模型的正确性。采用本文方法对一"十"字形管网进行了地震反应分析,结果表明:①管线轴向应力沿着管线长度从管线端部向管线交叉点逐步增大,在管线交叉点处应力达到最大值;②与轴向应力相比,尽管管线的弯曲应力不是控制应力,但在管线端部及管线交叉点处弯曲应力值将会有较大突变。因此,对于地下管网而言,在受到地震作用时,不同布置方向的管线之间的相互影响是不容忽视的。
Pseudo-static analysis model of buried pipeline network under multiple-support seismic excitations is presented.Based on FEM model,the stiffness equation of buried pipeline network is established. Considering the spatial correlation of different ground motions and the non-uniformity of soil conditions, the simulation of ground motion field is introduced and the method of motion input on pipeline network is proposed.The validity of this model is proved then by theoretical solutions.Finally,a cross type pipeline network under seismic excitations is analyzed by this method,the result shows that:1)axial stress increases gradually along pipeline from the end to intersection of the two pipelines,and reaches peak value at intersection point;2)compared with axial stress,bending stress is much smaller,but abrupt changes appear at the end and intersection of the pipeline network.Therefore,it is necessary to analyze the pipeline network as a system under seismic excitations.
Pseudo-static analysis model of buried pipeline network under multiple-support seismic excitations is presented.Based on FEM model,the stiffness equation of buried pipeline network is established. Considering the spatial correlation of different ground motions and the non-uniformity of soil conditions, the simulation of ground motion field is introduced and the method of motion input on pipeline network is proposed.The validity of this model is proved then by theoretical solutions.Finally,a cross type pipeline network under seismic excitations is analyzed by this method,the result shows that:1)axial stress increases gradually along pipeline from the end to intersection of the two pipelines,and reaches peak value at intersection point;2)compared with axial stress,bending stress is much smaller,but abrupt changes appear at the end and intersection of the pipeline network.Therefore,it is necessary to analyze the pipeline network as a system under seismic excitations.
引文
[1]Ariman T,Muleski G E.A review of the response of buried pipelines under seismic excitations[J].Journal of Earthquake Engineering and Structural Dynamics, 1981,(9):133-151.
[2]Shah H H,Chu S C.Seismic analysis of under ground structural elements[J].Journal of the Power Division, ASCE,1974,(100):53-62.
[3]Singhal A C,Meng C L.Junction stresses in buried jointed pipelines[J].Journal of Transportation Engineering, ASCE,1983,(109):450-461.
[4]Takada S,Tanabe K.Three dimensional seismic response analysis of buried continuous or jointed pipelines[J].Journal of Pressure Vessel Technology, ASME.1987,(109):80-87.
[5]Wang R L,Lau Y C.Elasto-plastic seismic analysis of buried pipeline systems under ground shaking [M]//王汝梁.地下管线的震害、抗震验算、设计与措施.北京:地震出版社,2007.185-195. Wang R L,Lau Y C.Elasto-plastic seismic analysis of buried pipeline systems under ground shaking [M]//Wang R L.Buried Lifeline Earthquake Engineering and Related Research.Beijing:Seismological Press,2007.185-195.
[6]Wang R L,Wu M Z.Nonlinear dynamic seismic analysis of buried pipelines[M]//王汝梁.地下管线的震害、抗震验算、设计与措施.北京:地震出版社,2007. 196-204.
[7]Wang R L,Wu M Z.Nonlinear dynamic seismic analysis of buried pipelines[M]// Wang R L.Buried Lifeline Earthquake Engineering and Related Research. Beijing:Seismological Press,2007.196-204. [7]Wang R L,Zhang H Z.Buried pipeline system in a liquefaction environment[M]//王汝梁.地下管线的震害、抗震验算、设计与措施.北京:地震出版社,2007. 174-182. Wang R L,Zhang H Z.Buried pipeline system in a liquefaction environment[M]// Wang R L.Buried Lifeline Earthquake Engineering and Related Research. Beijing:Seismological Press,2007.174-182.
[8]He Y A.Liang J W.3-D responses of buried pipeline systems under earthquake wave propagation[C]// Proceedings of 10th World Conference of Earthquake Engineering.Madrid:[s.n.],1992.5529-5534.
[9]Kuwata Y,Takada S,Yamasaki S.Seismic performance of complicated pipeline network[C]//Proceedings of 14~(th) World Conference of Earthquake Engineering. Beijing:[s.n.],2008.
[10]王勖成.有限单元法[M].北京:清华大学出版社, 2003.310. Wang X C.Finite Element Method[M].Beijing:Tsinghua University Press,2003.310.
[11]Wang R L.Vibration frequencies of buried pipelines [M]//王汝梁.地下管线的震害、抗震验算、设计与措施.北京:地震出版社,2007.23-36. Wang R L.Vibration frequencies of buried pipelines [M]//Wang R L.Buried Lifeline Earthquake Engineering and Related Research.Beijing:Seismological Press,2007.23-36.
[12]Deodatis G.Non-stationary stochastic vector processes: seismic ground motion applications[J].Probabilistic Engineering Mechanics,1996,(11):149-168.
[2]Shah H H,Chu S C.Seismic analysis of under ground structural elements[J].Journal of the Power Division, ASCE,1974,(100):53-62.
[3]Singhal A C,Meng C L.Junction stresses in buried jointed pipelines[J].Journal of Transportation Engineering, ASCE,1983,(109):450-461.
[4]Takada S,Tanabe K.Three dimensional seismic response analysis of buried continuous or jointed pipelines[J].Journal of Pressure Vessel Technology, ASME.1987,(109):80-87.
[5]Wang R L,Lau Y C.Elasto-plastic seismic analysis of buried pipeline systems under ground shaking [M]//王汝梁.地下管线的震害、抗震验算、设计与措施.北京:地震出版社,2007.185-195. Wang R L,Lau Y C.Elasto-plastic seismic analysis of buried pipeline systems under ground shaking [M]//Wang R L.Buried Lifeline Earthquake Engineering and Related Research.Beijing:Seismological Press,2007.185-195.
[6]Wang R L,Wu M Z.Nonlinear dynamic seismic analysis of buried pipelines[M]//王汝梁.地下管线的震害、抗震验算、设计与措施.北京:地震出版社,2007. 196-204.
[7]Wang R L,Wu M Z.Nonlinear dynamic seismic analysis of buried pipelines[M]// Wang R L.Buried Lifeline Earthquake Engineering and Related Research. Beijing:Seismological Press,2007.196-204. [7]Wang R L,Zhang H Z.Buried pipeline system in a liquefaction environment[M]//王汝梁.地下管线的震害、抗震验算、设计与措施.北京:地震出版社,2007. 174-182. Wang R L,Zhang H Z.Buried pipeline system in a liquefaction environment[M]// Wang R L.Buried Lifeline Earthquake Engineering and Related Research. Beijing:Seismological Press,2007.174-182.
[8]He Y A.Liang J W.3-D responses of buried pipeline systems under earthquake wave propagation[C]// Proceedings of 10th World Conference of Earthquake Engineering.Madrid:[s.n.],1992.5529-5534.
[9]Kuwata Y,Takada S,Yamasaki S.Seismic performance of complicated pipeline network[C]//Proceedings of 14~(th) World Conference of Earthquake Engineering. Beijing:[s.n.],2008.
[10]王勖成.有限单元法[M].北京:清华大学出版社, 2003.310. Wang X C.Finite Element Method[M].Beijing:Tsinghua University Press,2003.310.
[11]Wang R L.Vibration frequencies of buried pipelines [M]//王汝梁.地下管线的震害、抗震验算、设计与措施.北京:地震出版社,2007.23-36. Wang R L.Vibration frequencies of buried pipelines [M]//Wang R L.Buried Lifeline Earthquake Engineering and Related Research.Beijing:Seismological Press,2007.23-36.
[12]Deodatis G.Non-stationary stochastic vector processes: seismic ground motion applications[J].Probabilistic Engineering Mechanics,1996,(11):149-168.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心