考虑行波效应的实时耦联动力试验
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摘要
大型空间结构的地震响应分析须要考虑多点多维地震动输入,常规动力试验方法在研究相关问题时存在一定困难。本文将实时耦联动力试验方法引入这一问题的试验研究,以两个固支于半无限地基的单层刚架模型为例,进行了考虑行波效应的实时耦联动力试验。在试验中,两个单层刚架作为试验子结构分别在两个振动台上进行加载,半无限地基作为数值子结构用有限元法进行数值模拟,两个子结构之间实时进行数据交互,模拟地震波的传播和整体结构的动力响应。试验结果与有限元数值模拟吻合良好,该试验方法具有理想的精度,是一个研究行波效应的可靠试验方法。对不同剪切波速地基的试验结果对比分析表明,软土地基中行波效应的影响更为明显。
Multi-dimensional and multi-support excitation should be employed for seismic analysis of large space structures,but its study is difficult if using traditional dynamic testing.This paper presents a real-time dynamic hybrid testing method for traveling wave effect testing on a model of two shear frames mounted on semi-infinite soil foundation.In this test method,the steel frames as experimental substructure were loaded on two shaking tables,respectively,while the semi-infinite foundation as numerical substructure was numerically modeled by finite element method.Real-time data interaction between these substructures was maintained,so seismic wave propagation and dynamic responses of the coupled system can be simulated.Comparison of the present results with FEM analysis shows that this new testing method can achieve a good accuracy,a reliable method for traveling wave effect study.Application to different soils shows greater influence of soft soil on traveling wave effect.
Multi-dimensional and multi-support excitation should be employed for seismic analysis of large space structures,but its study is difficult if using traditional dynamic testing.This paper presents a real-time dynamic hybrid testing method for traveling wave effect testing on a model of two shear frames mounted on semi-infinite soil foundation.In this test method,the steel frames as experimental substructure were loaded on two shaking tables,respectively,while the semi-infinite foundation as numerical substructure was numerically modeled by finite element method.Real-time data interaction between these substructures was maintained,so seismic wave propagation and dynamic responses of the coupled system can be simulated.Comparison of the present results with FEM analysis shows that this new testing method can achieve a good accuracy,a reliable method for traveling wave effect study.Application to different soils shows greater influence of soft soil on traveling wave effect.
引文
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[11]WANG Qiang,WANG Jinting,JIN Feng,et al.Real-time dynamic hybrid testing for soil-structure interaction analysis[J].SoilDynamics and Earthquake Engineering,2011,31:1690-1702.
[12]迟福东,王进廷,金峰,等.土-结构-流体动力相互作用的实时耦联动力试验[J].岩土力学,2010,31(12):3765-3770.CHI Fudong,WANG Jinting,JIN Feng,et al.Real-time dynamic hybrid testing for soil-structure-fluid interaction analysis[J].Rock and Soil Mechanics,2010,31(12):3765-3770.(in Chinese)
[13]Chen C,Ricles J M.Large scale real-time hybrid simulation involving multiple experimental substructures and adaptive actuatordelay compensation[J].Earthquake Engineering and Structural Dynamics,2012,41(3):549-569.
[14]Saouma V,Kang D H,Haussmann G.A computational finite-element program for hybrid simulation[J].Earthquake Engineeringand Structural Dynamics,2012,41(3):375-389.
[15]LIU Jingbo,LI Bin.A unified viscous-spring artificial boundary for 3-D static and dynamic applications[J].Science in ChinaSeries E:Engineering&Materials Science,2005,48(5):570-584.
[2]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 Danguang,LOU Menglin,FAN Lichu.Status of seismic response analysis of long-span structures under multiple supportexcitations[J].Journal of Tongji University,2001,29(10):1213-1219.(in Chinese)
[3]陈厚群,侯顺载,张力飞,等.拱坝多点输入动力反应的试验研究[J].水利学报,1995,(8):12-20.CHEN Houqun,HOU Shunzai,ZHANG Lifei,et al.Experimental study on multiple excitation technique of arch dams[J].Journalof Hydraulic Engineering,1995,(8):12-20.(in Chinese)
[4]白凤龙,李宏男.地震动空间变化效应对大跨度桁架拱反应的影响[J].工程力学,2011,28(10):111-117,123.BAI Fenglong,LI Hongnan.The influence of ground motion spatial variation effect on seismic response of long span trussed arch[J].Engineering Mechanics,2011,28(10):111-117,123.(in Chinese)
[5]史晓军,岳庆霞,李杰.土-结构动力相互作用振动台试验中模型地基影响因素分析[J].建筑科学与工程学报,2007,24(4):50-53,59.SHI Xiaojun,YUE Qingxia,LI Jie.Influence factor analysis of foundation model in shaking table test considering soil-structuredynamic interaction[J].Journal of Architecture and Civil Engineering,2007,24(4):50-53,59.(in Chinese)
[6]闫维明,许广,任晓强,等.多点激励下拱桥模型振动台试验及数值模拟研究[J].震灾防御技术,2009,4(2):150-157.YAN Weiming,XU Guang,REN Xiaoqiang,et al.An arch bridge model under multi-support excitations from shaking table test andnumerical simulations[J].Technology for Earthquake Disaster Prevention,2009,4(2):150-157.(in Chinese)
[7]陈寅,邱法维,侯杰,等.单层连续梁桥多点地震输入拟动力实验研究[J].工程抗震与加固改造,2010,32(1):63-69.CHEN Yin,QIU Fawei,HOU Jie,et al.Research on pseudo-dynamic test control of single continuous bridge under multi-supportseismic excitation[J].Earthquake Resistant Engineering and Retrofitting,2010,32(1):63-69.(in Chinese)
[8]Nakashima M,Kato H,Takaoka E.Development of real-time pseudo dynamic testing[J].Earthquake Engineering and StructuralDynamics,1992,21(1):79-92.
[9]Bonnet P A,Lim C N,Williams M S.Real-time hybrid experiments with Newmark integration,MCSmd outer-loop control and multi-tasking strategies[J].Earthquake Engineering and Structural Dynamics,2007,36(1):119-141.
[10]Mosqueda1 G,Ahmadizadeh M.Iterative implicit integration procedure for hybrid simulation of large nonlinear structures[J].Earthquake Engineering and Structural Dynamics,2010,40(9):945-960.
[11]WANG Qiang,WANG Jinting,JIN Feng,et al.Real-time dynamic hybrid testing for soil-structure interaction analysis[J].SoilDynamics and Earthquake Engineering,2011,31:1690-1702.
[12]迟福东,王进廷,金峰,等.土-结构-流体动力相互作用的实时耦联动力试验[J].岩土力学,2010,31(12):3765-3770.CHI Fudong,WANG Jinting,JIN Feng,et al.Real-time dynamic hybrid testing for soil-structure-fluid interaction analysis[J].Rock and Soil Mechanics,2010,31(12):3765-3770.(in Chinese)
[13]Chen C,Ricles J M.Large scale real-time hybrid simulation involving multiple experimental substructures and adaptive actuatordelay compensation[J].Earthquake Engineering and Structural Dynamics,2012,41(3):549-569.
[14]Saouma V,Kang D H,Haussmann G.A computational finite-element program for hybrid simulation[J].Earthquake Engineeringand Structural Dynamics,2012,41(3):375-389.
[15]LIU Jingbo,LI Bin.A unified viscous-spring artificial boundary for 3-D static and dynamic applications[J].Science in ChinaSeries E:Engineering&Materials Science,2005,48(5):570-584.
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