大跨度张弦梁结构的地震响应分析
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摘要
本文分析了预张力的大小、撑杆的数目、地震的行波效应和结构约束条件对大跨度张弦梁结构地震响应的影响。结果表明:结构的初始地震响应随着索内预张力的增大而增大,然后逐渐趋于接近,与预张力大小无关;撑杆的数目和位置对结构的地震响应影响很小;与地震波的一致输入相比,考虑行波效应的索应力响应峰值增大62.9%,竖向位移响应峰值增大36.2%;张弦梁结构的地震响应对支座约束条件很敏感,约束条件改变,地震响应改变很大。
In this paper, the analysis of the influence of different brace bars arrangements, different prestresses, different restrictions and travelingwave effect on the seismic response of longspan beam string structure is performed. The numerical results shows that the preliminary seismic response of structure increases with the prestress enhancement, then,the seismic response of structure approaches to the same value gradually. The number and position of brace bars have faint influence on the seismic response peak value of stress of tightwire (increasing 62.9%), and the peak value of vertical displacement increases 36.2% when considering travelingwave effect.Compared to the consistent excitations of earthquake,the different restrictions have remarkable influence on the seismic responses of longspan beam string structure.
In this paper, the analysis of the influence of different brace bars arrangements, different prestresses, different restrictions and travelingwave effect on the seismic response of longspan beam string structure is performed. The numerical results shows that the preliminary seismic response of structure increases with the prestress enhancement, then,the seismic response of structure approaches to the same value gradually. The number and position of brace bars have faint influence on the seismic response peak value of stress of tightwire (increasing 62.9%), and the peak value of vertical displacement increases 36.2% when considering travelingwave effect.Compared to the consistent excitations of earthquake,the different restrictions have remarkable influence on the seismic responses of longspan beam string structure.
引文
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[3] 陈以一,汪大绥,等.上海浦东国际机场候机楼R2钢屋架足尺试验研究[J].建筑结构学报,1999,20(2):9-17.
[4] 白正仙.张弦梁结构的理论分析与试验研究[D].天津大学,1998.
[5] 唐建民,卓家寿.拉索穹顶结构非线性分析的混合有限元增量法[J].计算力学学报,2000,17(1):81-88.
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[8] 李国强,沈祖炎,等.上海浦东国际机场R2钢屋盖模型模拟三向地震震动台试验研究[J].建筑结构学报,1999,20(2):18-27.
[9] 董石麟.我国大跨度空间钢结构的发展与展望[J].空间结构,2000,6(2):3-13.
[2] 胡学仁,陈剑南,等.梁弦式预应力轻钢结构的开发应用[A].第四届空间钢结构文集[C],706-711.
[3] 陈以一,汪大绥,等.上海浦东国际机场候机楼R2钢屋架足尺试验研究[J].建筑结构学报,1999,20(2):9-17.
[4] 白正仙.张弦梁结构的理论分析与试验研究[D].天津大学,1998.
[5] 唐建民,卓家寿.拉索穹顶结构非线性分析的混合有限元增量法[J].计算力学学报,2000,17(1):81-88.
[6] SaitohM.StudyonMechanicalCharacteristicsofALight-WightComplexStructureComposedofAMembraneandABeamStringStructures[A].IASSSymposiumonSpatial,LatticeandTensionStructure[C],1994,633-641.
[7] ShiroKato,etc.ActiveControlofAxialForcesinBeamStringSpaceFrames,Spatial,LatticeandTensionStructure[A].Pro.oftheIASS-ASCEInt.Symposium[C],1994,.664-673.
[8] 李国强,沈祖炎,等.上海浦东国际机场R2钢屋盖模型模拟三向地震震动台试验研究[J].建筑结构学报,1999,20(2):18-27.
[9] 董石麟.我国大跨度空间钢结构的发展与展望[J].空间结构,2000,6(2):3-13.
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