多点地震激励下输电塔动力响应分析
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摘要
对于大跨度结构,分析时应考虑多点地震激励问题。本文考虑行波效应及部分相干效应生成人工地震波,对比分析了多点地震激励及一致地震激励下,输电塔-线体系与输电塔单塔结构动力响应的差别。并研究了跨距、弧垂等因素对输电塔动力响应的影响。结果表明,多点地震激励和导线可能会增大输电塔结构的动力响应,分析时应考虑其影响。
In earthquake analysis,multi-support excitation should be considered for long-span structures. In this paper,wave-traveling effect and partial coherence were considered to generate artificial wave. Multi-excitation and uniform excitation stochastic response analysis was performed for transmission tower and transmission tower-line system. The influence of circuit for tower structure earthquake response was also analyzed. As a result,multi-support excitation and circuit may increase the response of the tower; thus,they should be considered in analysis.
In earthquake analysis,multi-support excitation should be considered for long-span structures. In this paper,wave-traveling effect and partial coherence were considered to generate artificial wave. Multi-excitation and uniform excitation stochastic response analysis was performed for transmission tower and transmission tower-line system. The influence of circuit for tower structure earthquake response was also analyzed. As a result,multi-support excitation and circuit may increase the response of the tower; thus,they should be considered in analysis.
引文
[1]台湾地震工程研究中心.九二一集集大地震震灾调查报告[R].2001.Taiwan Center for Research on Earthquake.9.21 Chi-Chi Earthquake Earthquake Investigation Report[R].2001.(in Chinese)
[2]Dumanogluid A A,Soyluk K.A stochastic analysis of long span structures subjected to spatially varying ground motions including the site-response effect[J].Engineering Structures.2003,25(10):1301-1310.
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[4]江宜城,杨德喜,李黎,等.LRB隔震桥梁空间变异性地震随机响应分析[J].振动与冲击,2007,26(1):104-107.JIANG Yicheng,YANG Dexi,LI Li,et al.Stochastic analysis on LRB isolated bridge under spatial coherence earthquake[J].Journal of Vibration and Shock,2007,26(1):104-107.(in Chinese)
[5]虞终军,马人乐,徐荣璞.大跨度钢塔的多点地震输入反应[J].特种结构,1999(04):1-3.YU Zhongjun,MA Renle,et al.Response of long span steel tower under multi-excitation earthquake[J].Special Structures,1999(04):1-3.(in Chinese)
[6]Ghobarah A,Aziz T S,El-Attar M.Response of transmission lines to multiple support excitation[J].Engineering Structures.1996,18(12):936-946.
[7]全伟,李宏男,岳茂光.多点激励下输电塔-导线体系纵向地震反应分析[J].振动与冲击,2008(10):75-80.QUAN Wei,LI Hongnan,et al.Earthquake response analysis of transmission tower-line under multi-excitation input[J].Journal of Vibration and Shock,2008(10):75-80.(in Chinese)
[8]Deodatis G.Non-stationary stochastic vector processes:seismic ground motion applications[J].Probabilistic Engineering Mechanics,1996,11(3):149-167.
[2]Dumanogluid A A,Soyluk K.A stochastic analysis of long span structures subjected to spatially varying ground motions including the site-response effect[J].Engineering Structures.2003,25(10):1301-1310.
[3]Soyluk K,Dumanoglu A A.Spatial variability effects of ground motions on cable-stayed bridges[J].Soil Dynamics and Earthquake Engineering.2004,24(3):241-250.
[4]江宜城,杨德喜,李黎,等.LRB隔震桥梁空间变异性地震随机响应分析[J].振动与冲击,2007,26(1):104-107.JIANG Yicheng,YANG Dexi,LI Li,et al.Stochastic analysis on LRB isolated bridge under spatial coherence earthquake[J].Journal of Vibration and Shock,2007,26(1):104-107.(in Chinese)
[5]虞终军,马人乐,徐荣璞.大跨度钢塔的多点地震输入反应[J].特种结构,1999(04):1-3.YU Zhongjun,MA Renle,et al.Response of long span steel tower under multi-excitation earthquake[J].Special Structures,1999(04):1-3.(in Chinese)
[6]Ghobarah A,Aziz T S,El-Attar M.Response of transmission lines to multiple support excitation[J].Engineering Structures.1996,18(12):936-946.
[7]全伟,李宏男,岳茂光.多点激励下输电塔-导线体系纵向地震反应分析[J].振动与冲击,2008(10):75-80.QUAN Wei,LI Hongnan,et al.Earthquake response analysis of transmission tower-line under multi-excitation input[J].Journal of Vibration and Shock,2008(10):75-80.(in Chinese)
[8]Deodatis G.Non-stationary stochastic vector processes:seismic ground motion applications[J].Probabilistic Engineering Mechanics,1996,11(3):149-167.
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