大跨度钢混组合桥梁结构地震响应分析
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摘要
某在建的公铁两用斜拉桥为双塔三索面漂浮体系,建立了该桥的动力计算模型,并获得了此桥的动力特性。在求得了该桥的等效阻尼比,并对反应谱进行了长周期段和阻尼影响修正的前提下,进行了该漂浮体系钢-混凝土组合结构斜拉桥的地震反应谱响应分析。分析结果表明,对于钢-混凝土组合结构,必须求出其整体结构的等效阻尼比,以此阻尼比为依据,对反应谱进行阻尼影响的修正,同时应考虑反应谱长周期段取值对长周期结构地震反应谱响应的影响。
The building highway-railway cable stayed bridge is a float system with twin towers and three cable plane,and the dynamic calculation model was established for getting the dynamic property of the bridge.In the premise of getting the bridge's equivalent modal damping ratios and modifying the long period sector and the damping effect of the spectrum,a seismic spectrum response analysis was done.All the results show that,to the composite structure of steel-reinforced concrete,it is necessary to calculate the equivalent damping ratio of the overall structure and modify the damping effect of the spectrum.Simultaneously,the long period response spectrum value for the effect of the seismic spectrum response of the long period structure should be considered.
The building highway-railway cable stayed bridge is a float system with twin towers and three cable plane,and the dynamic calculation model was established for getting the dynamic property of the bridge.In the premise of getting the bridge's equivalent modal damping ratios and modifying the long period sector and the damping effect of the spectrum,a seismic spectrum response analysis was done.All the results show that,to the composite structure of steel-reinforced concrete,it is necessary to calculate the equivalent damping ratio of the overall structure and modify the damping effect of the spectrum.Simultaneously,the long period response spectrum value for the effect of the seismic spectrum response of the long period structure should be considered.
引文
[1]范立础.桥梁抗震[M].上海:同济大学出版社,1996.
[2]黄本才.组合结构振动的等效阻尼比[J].上海力学,1998,19(2):141-145.
[3]韦晓,王君杰,袁万城,等.桥梁抗震设计规范实用功率谱[J].同济大学学报,2000,28(1):98-102.
[4]项海帆,陈国强.规范化的人工地震波[J].同济大学学报,1985,(4):1-12.
[5]王小平,李孝钰,黄定如.阻尼对加层房屋地震反应的影响和修正[J].武汉工业大学学报,1996,18(3):98-100.
[6]王君杰,范立础.规范反应谱长周期部分修正方法的探讨[J].土木工程学报,1998,31(6):49-55.
[7]申爱国,李乔,朱敏.芜湖长江大桥斜拉桥地震反应分析[J].世界地震工程,2000,16(3):90-94.
[8]JTJ—89,公路工程抗震设计规范[S].
[9]马东辉,李虹,苏经宇,等.阻尼比对设计反应谱的影响分析[J].工程抗震,1995,12(4):35-40.
[2]黄本才.组合结构振动的等效阻尼比[J].上海力学,1998,19(2):141-145.
[3]韦晓,王君杰,袁万城,等.桥梁抗震设计规范实用功率谱[J].同济大学学报,2000,28(1):98-102.
[4]项海帆,陈国强.规范化的人工地震波[J].同济大学学报,1985,(4):1-12.
[5]王小平,李孝钰,黄定如.阻尼对加层房屋地震反应的影响和修正[J].武汉工业大学学报,1996,18(3):98-100.
[6]王君杰,范立础.规范反应谱长周期部分修正方法的探讨[J].土木工程学报,1998,31(6):49-55.
[7]申爱国,李乔,朱敏.芜湖长江大桥斜拉桥地震反应分析[J].世界地震工程,2000,16(3):90-94.
[8]JTJ—89,公路工程抗震设计规范[S].
[9]马东辉,李虹,苏经宇,等.阻尼比对设计反应谱的影响分析[J].工程抗震,1995,12(4):35-40.
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