近断层地震作用下平面不规则基础隔震结构的倒塌模拟
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摘要
分析了平面不规则基础隔震结构在近断层地震作用下的抗震性能,并对其进行了倒塌过程模拟。基础隔震结构目前在国内外都比较常见,其安全性也得到了广泛的关注。由于基础隔震结构的自振周期较长,所以近断层地震动对基础隔震结构的抗震性能有不利的影响。通过建立倒塌分析动力方程,使非线性仿真分析的解答精度得以保证,以此建立平面不规则基础隔震结构和非隔震结构模型,选择不同的近断层地震动作为输入进行非线性仿真分析。研究表明:近断层地震作用下平面不规则基础隔震结构的扭转效应相对于非隔震结构的扭转效应明显减小。同时,倒塌模拟表明,平面不规则的非隔震结构较基础隔震结构容易倒塌。
In this paper,the seismic performance of plane irregular base-isolated structures subjected to near-fault seismic motion is analyzed.And the collapse simulation of plane irregular base-isolated structures subjected to near-fault seismic motion is also analyzed.These kinds of base-isolated structures are now more common at home and abroad.Its safety has also been widespread concern.As the natural period of the base-isolated structures is long,so the near-fault seismic motion have an adverse effect on the seismic performance of base-isolated structures.The simulation analysis of nonlinear solution accuracy can be guaranteed through the establishment of collapse analysis of dynamic equation.Plane irregular base-isolated structure model and non-isolated structure model are established based on the dynamic equation,and the different near-fault seismic motions are chose as input analyze non-linear simulation of these two structures.The results show that plane irregular base-isolated structure's torsion effect subjected to near-fault seismic motion relative to the non-isolated structure's torsion effect obvious decrease.Meanwhile,the collapse simulation shows that plane irregular non-isolated structure is easier to collapse than plane irregular base-isolated structure.
In this paper,the seismic performance of plane irregular base-isolated structures subjected to near-fault seismic motion is analyzed.And the collapse simulation of plane irregular base-isolated structures subjected to near-fault seismic motion is also analyzed.These kinds of base-isolated structures are now more common at home and abroad.Its safety has also been widespread concern.As the natural period of the base-isolated structures is long,so the near-fault seismic motion have an adverse effect on the seismic performance of base-isolated structures.The simulation analysis of nonlinear solution accuracy can be guaranteed through the establishment of collapse analysis of dynamic equation.Plane irregular base-isolated structure model and non-isolated structure model are established based on the dynamic equation,and the different near-fault seismic motions are chose as input analyze non-linear simulation of these two structures.The results show that plane irregular base-isolated structure's torsion effect subjected to near-fault seismic motion relative to the non-isolated structure's torsion effect obvious decrease.Meanwhile,the collapse simulation shows that plane irregular non-isolated structure is easier to collapse than plane irregular base-isolated structure.
引文
[1]杨迪雄,李刚,程耿东.近断层脉冲型地震动作用下隔震结构地震反应分析[J].地震工程与工程振动,2005,25(2):119～124Yang Di-xiong,Li Gang,Cheng Geng-dong.SeismicAnalysis of Base-isolated Structures Subjected to Near-fault Pulse-like Ground Motions[J].Journal ofEarthquake Engineering and Engineering Vibration,2005,25(2):119～124(in Chinese)
[2]Nagarajaiah S,Reinhorn A M,Constantinou M C.Torsional-coupling in Sliding Base Isolated Structures[J].Journal of Structural Engineering,1993,119(1):130～149
[3]赵建东,王曙光,刘伟庆.L形高层隔震结构扭转影响参数分析[J].世界地震工程,2010,26(3):74～79Zhao Jian-dong,Wang Shu-guang,Liu Wei-qing.Analysis on the Torsion Parameters of L-shaped High-rise Isolation Buildings[J].World EarthqukeEngineering,2010,26(3):74～79(in Chinese)
[4]顾祥林,印小晶,林峰,王英.建筑结构倒塌过程模拟与防倒塌设计[J].建筑结构学报,2010,31(6):179～187Gu Xiang-lin,Yin Xiao-jing,Lin Feng,Wang Ying.Simulation of Collapse Process and Design Method toResist Collapse for Building Structures[J]Journal ofBuilding Structures,2010,31(6):179～187(inChinese)
[5]Huang Q H,Gu X L,Zhang Q.Simulation System forCollapse Responses of Reinforced Concrete FrameStructures[A]//Proceedings of the 9th InternationalConference on Inspection Appraisal Repairs&Maintenance of Structures Singapore CI-PremierConference Organization[C],2006:223～230
[6]Cundall P A.A Computer Method for SimulatingProgressive Large Scale Movements in Blocky RockSystems[A]//Proceedings of the Symposium of theInternational Society of Rock Mechanics[C].Nancy,France International Society of rock mechanics,1971:151～169
[7]Luccioni B M,Ambrosini R D,Danesi R E.Analysis ofBuilding Collapse under Blast Loads[J].EngineeringStructures,2004,26(1):63～71
[8]梁益,陆新征,李易,叶列平.国外RC框架抗连续倒塌设计方法的检验与分析[J].建筑结构,2010,40(2):8～12Liang Yi,Lu Xin-zheng,Li Yi,Ye Lie-ping.Verification and Analysis on Foreign Progressive-collapse-resistance Design Methods of RC FrameStructures[J]Journal of Building Structures,40(2):8～12(in Chinese)
[2]Nagarajaiah S,Reinhorn A M,Constantinou M C.Torsional-coupling in Sliding Base Isolated Structures[J].Journal of Structural Engineering,1993,119(1):130～149
[3]赵建东,王曙光,刘伟庆.L形高层隔震结构扭转影响参数分析[J].世界地震工程,2010,26(3):74～79Zhao Jian-dong,Wang Shu-guang,Liu Wei-qing.Analysis on the Torsion Parameters of L-shaped High-rise Isolation Buildings[J].World EarthqukeEngineering,2010,26(3):74～79(in Chinese)
[4]顾祥林,印小晶,林峰,王英.建筑结构倒塌过程模拟与防倒塌设计[J].建筑结构学报,2010,31(6):179～187Gu Xiang-lin,Yin Xiao-jing,Lin Feng,Wang Ying.Simulation of Collapse Process and Design Method toResist Collapse for Building Structures[J]Journal ofBuilding Structures,2010,31(6):179～187(inChinese)
[5]Huang Q H,Gu X L,Zhang Q.Simulation System forCollapse Responses of Reinforced Concrete FrameStructures[A]//Proceedings of the 9th InternationalConference on Inspection Appraisal Repairs&Maintenance of Structures Singapore CI-PremierConference Organization[C],2006:223～230
[6]Cundall P A.A Computer Method for SimulatingProgressive Large Scale Movements in Blocky RockSystems[A]//Proceedings of the Symposium of theInternational Society of Rock Mechanics[C].Nancy,France International Society of rock mechanics,1971:151～169
[7]Luccioni B M,Ambrosini R D,Danesi R E.Analysis ofBuilding Collapse under Blast Loads[J].EngineeringStructures,2004,26(1):63～71
[8]梁益,陆新征,李易,叶列平.国外RC框架抗连续倒塌设计方法的检验与分析[J].建筑结构,2010,40(2):8～12Liang Yi,Lu Xin-zheng,Li Yi,Ye Lie-ping.Verification and Analysis on Foreign Progressive-collapse-resistance Design Methods of RC FrameStructures[J]Journal of Building Structures,40(2):8～12(in Chinese)
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