基于PC集群的三维河谷场地长周期地震动响应并行计算
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摘要
利用编制的场地地震反应并行计算程序PSAP,分别选取基岩长周期地震波和普通地震波作为输入,采用等效线性化方法,对某河谷场地进行了不同类型地震波作用下的三维有限元并行计算,分析了三维河谷场地的长周期地震反应特点,探讨了不同视波速情形下河谷场地的行波效应。结果表明,行波作用下局部场地产生明显的竖向地震反应,长周期地震波的水平向加速度反应放大系数明显大于普通地震波的结果,利用PC集群并行求解技术可以有效提高大型有限元分析的计算效率。
Based on parallel simulating program PSAP,four long-period seismic waves and two common waves were selected in three dimensional long-period seismic responses equivalent-linear parallel analysis of a valley topography site under various seismic waves excitations,characteristics of long-period seismic response have been studied and traveling wave effect of valley topography site under different apparent wave velocity excitation has been discussed.The results show that traveling wave excitation will lead to significant vertical seismic responses in local site,the horizontal acceleration responses under long-period seismic waves excitation are greater than common waves excitation obviously,and the PC cluster parallel computation is also performed to raise the computational efficiency in solving the mass computing problem.
Based on parallel simulating program PSAP,four long-period seismic waves and two common waves were selected in three dimensional long-period seismic responses equivalent-linear parallel analysis of a valley topography site under various seismic waves excitations,characteristics of long-period seismic response have been studied and traveling wave effect of valley topography site under different apparent wave velocity excitation has been discussed.The results show that traveling wave excitation will lead to significant vertical seismic responses in local site,the horizontal acceleration responses under long-period seismic waves excitation are greater than common waves excitation obviously,and the PC cluster parallel computation is also performed to raise the computational efficiency in solving the mass computing problem.
引文
[1]潘旦光,楼梦麟.河谷地形对土层地震反应的影响[J].北京科技大学学报,2008,30(11):1217-1222.Pan D G,Lou M L.Effect of valley topography on theseismic responses of soil sites[J].Journal of Universi-ty of Science and Technology Beijing,2008,30(11):1217-1222.
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[7]付朝江,张武.结构有限元分析并行处理的研究进展[J].力学进展,2006,36(3):354-362.Fu Ch J,Zhang W.Progress in parallel processing infinite element structural analysis[J].Advances in Me-chanics,2006,36(3):354-362.
[8]上海市地震局,同济大学.上海市地震动参数区划[M].北京:地震出版社,2004.Shanghai Seismological Bureau,Tongji University.Seismic Ground Motion Parameter Zonation of Shang-hai[M].Beijing:Seismological Press,2004.
[9]楼梦麟,潘旦光,范立础.土层地震反应分析中侧向人工边界的影响[J].同济大学学报(自然科学版),2003,31(7):757-761.Lou M L,Pan D G,Fan L Ch.Effect of vertical arti-ficial boundary on seismic response of soil layer[J].Journal of Tongji University(Natural Science),2003,31(7):757-761.
[2]车伟,罗奇峰.复杂地形条件下地震波的传播研究[J].岩土工程学报,2008,30(9):1333-1337.Che W,Luo Q F.Seismic wave propagation in com-plex topography[J].Chinese Journal of GeotechnicalEngineering,2008,30(9):1333-1337.
[3]郭毅之,金先龙,丁俊宏,等.并行数值仿真技术在盾构隧道地震响应分析中的应用[J].应用基础与工程科学学报,2005,13(1):43-50.Guo Y Zh,Jin X L,Ding J H,et al.Parallel numeri-cal simulation techniques in seismic response analysisof shield tunnel[J].Journal of Basic Science and Engi-neering,2005,13(1):43-50.
[4]臧明明,陈清军.长周期地震动的场地效应与大跨桥梁结构的动力响应分析[J].结构工程师,2010,26(1):122-129.Zang M M,Chen Q J.Site effect of long-periodground motion and dynamic analysis of long-spanbridge structures[J].Structural Engineers,2010,26(1):122-129.
[5]夏江.基于PC集群系统的场地地震反应并行计算研究[D].上海:同济大学,2007.Xia J.Study on parrallel computing of site seismic re-sponse analysis based on PC cluster[D].Shanghai:Tongji University,2007.
[6]阮红河,袁勇,柳献.分布存储环境并行有限元研究进展[J].同济大学学报,2005,33(1):21-27.Ruan H H,Yuan Y,Liu X.Progress of parallel finiteelement method on distributed-memory parallel com-puter systems[J].Journal of Tongji University,2005,33(1):21-27.
[7]付朝江,张武.结构有限元分析并行处理的研究进展[J].力学进展,2006,36(3):354-362.Fu Ch J,Zhang W.Progress in parallel processing infinite element structural analysis[J].Advances in Me-chanics,2006,36(3):354-362.
[8]上海市地震局,同济大学.上海市地震动参数区划[M].北京:地震出版社,2004.Shanghai Seismological Bureau,Tongji University.Seismic Ground Motion Parameter Zonation of Shang-hai[M].Beijing:Seismological Press,2004.
[9]楼梦麟,潘旦光,范立础.土层地震反应分析中侧向人工边界的影响[J].同济大学学报(自然科学版),2003,31(7):757-761.Lou M L,Pan D G,Fan L Ch.Effect of vertical arti-ficial boundary on seismic response of soil layer[J].Journal of Tongji University(Natural Science),2003,31(7):757-761.
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