高压输电塔-线耦联体系的实用简化抗震计算方法
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摘要
在现阶段的输电塔线体系抗震设计计算中均不考虑导线对塔的影响,然而大量的研究表明,按照现行《电力设施抗震设施规范》设计的高压输电塔线体系在强震作用下是偏于不安全的。根据5个实际工程,分别建立了高压输电塔线体系的三维有限元模型,并且考虑导线的几何非线性,以模拟两者间振动耦联效应的模型,进而验证输电塔-线耦联体系的简化抗震计算方法。分析结果表明,在纵向振动下,塔线耦联体系有限元模型结果与简化方法计算结果吻合得比较好,最大平均误差在5%以内;在侧向振动下,塔线耦联体系有限元模型结果与简化方法计算结果相差稍大,但最大平均误差也仅约为8%,由于某个输电塔共振引起的,这样的误差在实际工程中是完全可以接受的。最后,这些结果可供编制有关输电塔体系的设计规范提供参考。
Now the aseismic calculation of a transmission tower system takes no account of effect of line,a lot of studies show that the limited span of transmission lines should be considered to be important in the seismic response of high voltage transimission tower.According to five real projects,three-dimensional finite element models of high voltage transmission tower-line systems are established respectively considering the geometric nonlinearity of transmission lines to simulate tower and lines coupled vibration effect and check the simplified aseismic calculation method presented by the authors for coupled systems of transmission tower-line.The results show that the results of the finite element models of high-voltage transmission tower-line systems and those from the simplified aseismic computation agree very well during longitudinal vibration,the maximum average error is within 5%;the results of the finite element models of high-voltage transmission tower-line systems and those from the simplified aseismic computation have a little difference during lateral vibration,but the maximum average error is only 8%,this error could be acceptable in practical engineering.At the end,these conclusions can be for reference to design transmission tower-line systems.
Now the aseismic calculation of a transmission tower system takes no account of effect of line,a lot of studies show that the limited span of transmission lines should be considered to be important in the seismic response of high voltage transimission tower.According to five real projects,three-dimensional finite element models of high voltage transmission tower-line systems are established respectively considering the geometric nonlinearity of transmission lines to simulate tower and lines coupled vibration effect and check the simplified aseismic calculation method presented by the authors for coupled systems of transmission tower-line.The results show that the results of the finite element models of high-voltage transmission tower-line systems and those from the simplified aseismic computation agree very well during longitudinal vibration,the maximum average error is within 5%;the results of the finite element models of high-voltage transmission tower-line systems and those from the simplified aseismic computation have a little difference during lateral vibration,but the maximum average error is only 8%,this error could be acceptable in practical engineering.At the end,these conclusions can be for reference to design transmission tower-line systems.
引文
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[3]American Society of Civil Engineers:Guideline for ElectricalTransmission Line Structural Loading,ASCE Manual and Re-ports on Engineering Practice,1991(74),New York.
[4]杨骊先,等.高压输电线路柔性腹杆铁塔的计算分析[J].工程力学,1996,13(增刊):46—51.
[5]Mozer J D,et al.Longitudinal Load Analysis of TransmissionLine Systems[J].IEEE Transactions on power Apparatus andSystems,1997,PAS-96(5):1657—1665.
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[13]李宏男,王苏岩,班文卓.大跨越输电塔体系的抗震计算模型[J].特种结构,1998,15(3):47—50.
[14]李宏男,石文龙,王苏岩.高压输电塔-导线耦联体系的简化抗震计算方法[J].特种结构,2002(3):58—61.
[15]李宏男,石文龙,等.考虑导线影响的输电塔侧向简化抗震计算方法[J].振动工程学报,2003,16(2):234—237.
[16]石文龙,贾连光,李宏男.竖向振动时导线对高压输电塔体系的影响[J].沈阳建筑工程学院学报,2001,17(4):262—264.
[17]李宏男,石文龙,贾连光.导线对输电塔体系纵向振动的影响界限及简化抗震计算方法[J].振动与冲击,2004,23(2):1—7.
[18]邓洪洲,陈晓明,屠海明,等.江阴大跨越输电塔模型实验研究[J].建筑结构学报,2001,22(6):31—35.
[19]沈世钊,徐崇宝,赵臣.悬索结构设计[M].北京:中国建筑工业出版社,1997.
[20]梁峰,李黎,尹鹏.大跨越输电塔-线体系数值分析模型的研究[J].振动与冲击,2007,26(2):61—65.
[2]American Society of Civil Engineers Committee on ElectricalTransmission Structures:Loadings for Electrical TransmissionStructures[J].ASCE Journal of Structural Division 1982,108(5):1088—1105.
[3]American Society of Civil Engineers:Guideline for ElectricalTransmission Line Structural Loading,ASCE Manual and Re-ports on Engineering Practice,1991(74),New York.
[4]杨骊先,等.高压输电线路柔性腹杆铁塔的计算分析[J].工程力学,1996,13(增刊):46—51.
[5]Mozer J D,et al.Longitudinal Load Analysis of TransmissionLine Systems[J].IEEE Transactions on power Apparatus andSystems,1997,PAS-96(5):1657—1665.
[6]周新华.高压输电铁塔结构强度分析[D]:[学位论文].保定:华北电力大学(保定),2002.
[7]中华人民共和国电力工业部.《电力设施抗震设计规范》(GB 50260-96).北京:中国计划出版社,1996.
[8]国家电力公司华东电力设计院.《110kV~500kV架空送电线路设计技术规程》(DL/5092-1999).北京:中国电力出版社,1999.
[9]西南电力设计院.《架空送电线路杆塔结构设计技术规定》(DL/5154-2002).北京:中国电力出版社,2002.
[10]王前信,陆鸣,李宏男.输电塔-电缆体系的合理抗震计算简图[J].地震工程与工程振动,1989,9(3):81—90.
[11]李宏男,陆鸣,王前信.高压自立式高压输电塔-电缆体系的简化抗震计算[J].地震工程与工程振动,1990,10(2):73———87.
[12]李宏男,王前信.大跨越自立式高压输电塔体系的动力特性[J].土木工程学报,1997,30(5):28—36.
[13]李宏男,王苏岩,班文卓.大跨越输电塔体系的抗震计算模型[J].特种结构,1998,15(3):47—50.
[14]李宏男,石文龙,王苏岩.高压输电塔-导线耦联体系的简化抗震计算方法[J].特种结构,2002(3):58—61.
[15]李宏男,石文龙,等.考虑导线影响的输电塔侧向简化抗震计算方法[J].振动工程学报,2003,16(2):234—237.
[16]石文龙,贾连光,李宏男.竖向振动时导线对高压输电塔体系的影响[J].沈阳建筑工程学院学报,2001,17(4):262—264.
[17]李宏男,石文龙,贾连光.导线对输电塔体系纵向振动的影响界限及简化抗震计算方法[J].振动与冲击,2004,23(2):1—7.
[18]邓洪洲,陈晓明,屠海明,等.江阴大跨越输电塔模型实验研究[J].建筑结构学报,2001,22(6):31—35.
[19]沈世钊,徐崇宝,赵臣.悬索结构设计[M].北京:中国建筑工业出版社,1997.
[20]梁峰,李黎,尹鹏.大跨越输电塔-线体系数值分析模型的研究[J].振动与冲击,2007,26(2):61—65.
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