土桩结构非线性相互作用体系行波效应的并行计算分析
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摘要
采用并行计算方法,分别选取长周期地震波和普通地震波作为输入,以某典型桥梁工程为背景建立土桩桥梁结构非线性相互作用分析模型,对在不同类型地震波作用下的土桩结构非线性相互作用体系进行了行波效应分析,探讨了桩土接触效应和并行计算加速比等问题.分析结果表明:接触面效应对群桩水平向地震反应的影响较小,在竖直向则会产生明显的不协调现象.考虑接触面效应时,行波输入下的结构水平向加速度反应略小于一致输入,竖向加速度反应则远大于一致输入,水平向和竖向的位移反应也较大.长周期地震动行波输入下的水平向加速度和位移反应结果均大于普通地震波.对于此类大计算量三维有限元分析,采用并行计算方法可以有效提高计算效率.
For Buguzi River Bridge on Wulumuqi-Kash Railway,a three dimensional soil-pile-structure nonlinear interaction system model was built.Long-period and normal seismic waves were selected for three dimensional seismic response parallel computation of soil-pile-structure nonlinear interaction system,and the interface effect of pile-soil and speedup ratio of parallel computation were discussed.The results have shown that the interface effect of pile-soil leads to considerable vertical in-coordination.When considering the interface effect of pile-soil,the horizontal acceleration response of piles is decreased little and the vertical acceleration response of piles is increased greatly when compared with uniform excitation.Meanwhile,the horizontal and vertical displacement responses of piles are increased.The horizontal acceleration responses of lateral pile caps are smaller than that of medial pile caps,and that of vertical acceleration responses are opposite.Parallel computing was also performed to raise computational efficiency.
For Buguzi River Bridge on Wulumuqi-Kash Railway,a three dimensional soil-pile-structure nonlinear interaction system model was built.Long-period and normal seismic waves were selected for three dimensional seismic response parallel computation of soil-pile-structure nonlinear interaction system,and the interface effect of pile-soil and speedup ratio of parallel computation were discussed.The results have shown that the interface effect of pile-soil leads to considerable vertical in-coordination.When considering the interface effect of pile-soil,the horizontal acceleration response of piles is decreased little and the vertical acceleration response of piles is increased greatly when compared with uniform excitation.Meanwhile,the horizontal and vertical displacement responses of piles are increased.The horizontal acceleration responses of lateral pile caps are smaller than that of medial pile caps,and that of vertical acceleration responses are opposite.Parallel computing was also performed to raise computational efficiency.
引文
[1]潘旦光,楼梦麟,范立础.多点输入下大跨度结构地震反应分析研究现状[J].同济大学学报,2001,29(10):1213-1219.PAN Dan-guang,LOU Meng-lin,FAN Li-chu.Status of seis-mic response analysis of long-span structures under multiplesupport excitations[J].Journal of Tongji University,2001,29(10):1213-1219.(In Chinese)
[2]李正农,楼梦麟.大跨度桥梁结构地震动输入问题的研究现状[J].同济大学学报,1999,27(5):592-597.LI Zheng-nong,LOU Meng-lin.Research status in earthquakeinput of long-span bridges[J].Journal of Tongji University,1999,27(5):592-597.(In Chinese)
[3]熊辉,邹银生,尚守平.桩承上部结构的地震动力相互作用设计探讨[J].湖南大学学报:自然科学版,2007,34(11):1-5.XIONG Hui,ZOU Yin-sheng,SHANG Shou-ping.On thedynamic interaction designing of pile-supported structure underseismic load[J].Journal of Hunan University:Natural Sci-ences,2007,34(11):1-5.(In Chinese)
[4]陈清军,姜文辉,李哲明.桩土接触效应及对桥梁结构地震反应的影响[J].力学季刊,2005,26(4):609-613.CHEN Qing-jun,JIANG Wen-hui,LI Zhe-ming.Effect ofpile contact and its influence on seismic response of bridgestructure[J].Chinese Quarterly of Mechanics,2005,26(4):609-613.(In Chinese)
[5]ANSYS Inc.ANSYS Release 11.0-ANSYS Theory Refer-ence[M].Cononsburg,Pennsylvania:ANSYS Inc,2007.
[6]刘海笑,周锡礽.结构地震反应分析中接触面问题的处理[J].天津大学学报:自然科学与工程技术版,2000,33(1):41-43.LIU Hai-xiao,ZHOU Xi-reng.Treatment of interface behav-ior in earthquake response analysis of structure[J].Journal ofTianjin University:Science and Technology,2000,33(1):41-43.(In Chinese)
[7]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 Meng-lin,PAN Dan-guang,FAN Li-chu.Effect of ver-tical artificial boundary on seismic response of soil layer[J].Journal of Tongji University:Natural Science,2003,31(7):757-761.(In Chinese)
[8]钱伟平,刘义.布谷孜大桥特殊条件下的地基勘察及处理[J].岩土工程界,2000,3(7):36-40.QIAN Wei-ping,LIU Yi.The soil investigation in special con-ditions and its treatment of Buguzi River Major Bridge site[J].Geotechnical Engineering World,2000,3(7):36-40.(In Chi-nese)
[9]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 Yi-zhi,JIN Xian-long,DING Jun-hong,et al.Parallelnumerical simulation techniques in seismic response analysis ofshield tunnel[J].Journal of Basic Science and Engineering,2005,13(1):43-50.(In Chinese)
[2]李正农,楼梦麟.大跨度桥梁结构地震动输入问题的研究现状[J].同济大学学报,1999,27(5):592-597.LI Zheng-nong,LOU Meng-lin.Research status in earthquakeinput of long-span bridges[J].Journal of Tongji University,1999,27(5):592-597.(In Chinese)
[3]熊辉,邹银生,尚守平.桩承上部结构的地震动力相互作用设计探讨[J].湖南大学学报:自然科学版,2007,34(11):1-5.XIONG Hui,ZOU Yin-sheng,SHANG Shou-ping.On thedynamic interaction designing of pile-supported structure underseismic load[J].Journal of Hunan University:Natural Sci-ences,2007,34(11):1-5.(In Chinese)
[4]陈清军,姜文辉,李哲明.桩土接触效应及对桥梁结构地震反应的影响[J].力学季刊,2005,26(4):609-613.CHEN Qing-jun,JIANG Wen-hui,LI Zhe-ming.Effect ofpile contact and its influence on seismic response of bridgestructure[J].Chinese Quarterly of Mechanics,2005,26(4):609-613.(In Chinese)
[5]ANSYS Inc.ANSYS Release 11.0-ANSYS Theory Refer-ence[M].Cononsburg,Pennsylvania:ANSYS Inc,2007.
[6]刘海笑,周锡礽.结构地震反应分析中接触面问题的处理[J].天津大学学报:自然科学与工程技术版,2000,33(1):41-43.LIU Hai-xiao,ZHOU Xi-reng.Treatment of interface behav-ior in earthquake response analysis of structure[J].Journal ofTianjin University:Science and Technology,2000,33(1):41-43.(In Chinese)
[7]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 Meng-lin,PAN Dan-guang,FAN Li-chu.Effect of ver-tical artificial boundary on seismic response of soil layer[J].Journal of Tongji University:Natural Science,2003,31(7):757-761.(In Chinese)
[8]钱伟平,刘义.布谷孜大桥特殊条件下的地基勘察及处理[J].岩土工程界,2000,3(7):36-40.QIAN Wei-ping,LIU Yi.The soil investigation in special con-ditions and its treatment of Buguzi River Major Bridge site[J].Geotechnical Engineering World,2000,3(7):36-40.(In Chi-nese)
[9]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 Yi-zhi,JIN Xian-long,DING Jun-hong,et al.Parallelnumerical simulation techniques in seismic response analysis ofshield tunnel[J].Journal of Basic Science and Engineering,2005,13(1):43-50.(In Chinese)
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