大跨越钢管混凝土输电塔顺风向分区风荷载谱识别方法
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摘要
为了从风洞试验测量的位移响应中较好地识别出钢管混凝土输电塔的风荷载,对荷载识别过程进行了模拟。首先选择了3种类型的风荷载谱并将它们分区施加于输电塔的多质点模型上,利用随机振动理论计算出结构的位移功率谱;然后,推导出了从几个测点的位移功率谱识别分区风荷载谱的方法,并定义了评价识别效果的误差指标;最后,分析了测量精度、测点数量及位置、模态数及风荷载系数等对荷载识别精度的影响,得到一些对实际风洞试验具有重要指导价值的结论。
In order to better identify several wind load spectra of a long-span concrete-filled steel-tube transmission tower from displacements measured with wind tunnel tests,wind load identificaton processes were simulated with computer.Firstly,selecting three kinds of wind load spectra and exerting them on a model of transmission tower,the structure displacement power spectra were computed with random vibration method.Then,a method was introduced to identify several dynamic wind load spectra from the displacement power spectra of several measured points and error index was defined to evaluate identificaton effectiveness.Finally,effects of some factors,such as,measurement accuracy,number and position of measured points,modes taken and wind load coefficient,et al on accuracy of wind load identification were analyzed and some important conclusions were drawn so as to guide actual wind tunnel tests.
In order to better identify several wind load spectra of a long-span concrete-filled steel-tube transmission tower from displacements measured with wind tunnel tests,wind load identificaton processes were simulated with computer.Firstly,selecting three kinds of wind load spectra and exerting them on a model of transmission tower,the structure displacement power spectra were computed with random vibration method.Then,a method was introduced to identify several dynamic wind load spectra from the displacement power spectra of several measured points and error index was defined to evaluate identificaton effectiveness.Finally,effects of some factors,such as,measurement accuracy,number and position of measured points,modes taken and wind load coefficient,et al on accuracy of wind load identification were analyzed and some important conclusions were drawn so as to guide actual wind tunnel tests.
引文
[1]Zou L H,Liang S G,Li Q S,et al.Investigation of 3-Ddynamic wind loads on Lattice towers[J].Wind andStructures,2008,11(4):323-340.
[2]梁枢果,邹良浩,赵林,等.格构式塔架动力风荷载解析模型[J].同济大学学报(自然科学版),2008,36(2):166-171.LIANG Shu-guo,ZOU Liang-hao,ZHAO Lin,et al.Analytical model of dynamic wind loads on lattice towers[J].Journal of Tongji University:Natural Science,2008,36(2):166-171.
[3]梁枢果,朱继华,王力争.大跨越输电塔-线体系动力特性分析[J].地震工程与工程振动,2003,23(6):63-69.LIANG Shu-guo,ZHU Ji-hua,WANG Li-zheng.Analysis ofdynamic characters of electrical transmission tower-line systemwith a big span[J].Earthquake Engineering andEngineering Vbration,2003,23(6):63-69.
[4]梁波,徐建良.架空输电铁塔动力风响应的数值模拟[J].同济大学学报(自然科学版),2002,30(5):583-587.LIANG Bo,XU Jian-liang.Numerical simulation of along-wind response of transmission towers[J].Journal of TongjiUniversity:Natural Science,2002,30(5):583-587.
[5]梁枢果.输电塔-导线体系风振响应计算与气弹模型风洞试验研究报告[R].上海:同济大学土木工程防灾国家重点实验室访问学者基金资助项目,2002.
[6]楼文娟,孙炳楠,叶尹.高耸塔架横风向动力风效应[J].土木工程学报,1999,32(6):67-71.LOU Wen-juan,SUN Bing-nan,YE Yin.Across-winddynamic response of latticed towers[J].China civilEngineering Journal,1999,32(6):67-71.
[7]梁枢果,邹良浩,赵林,等.输电塔-线体系完全气弹模型风洞试验研究[J].土木工程学报,2010,43(5):70-78.LIANG Shu-guo,ZOU Liang-hao,ZHAO Lin,et al.Study ofwind tunnel tests of a full aero-elastic model of electricaltransmission tower-line systems[J].China Civil EngineeringJournal,2010,43(5):70-78.
[8]邓洪洲,朱松晔,陈晓明,等.大跨越输电塔线体系气弹模型风洞试验[J].同济大学学报(自然科学版),2003,31(2):132-137.DENG Hong-zhou,ZHU Song-ye,CHEN Xiao-ming,et al.Wind tunnel investigation on model of long span transmissionline system[J].Journal of Tongji University:NaturalScience,2003,31(2):132-137.
[9]熊铁华,梁枢果,邹良浩.风荷载下输电铁塔的失效模式及其极限荷载[J].工程力学,2009,26(12):100-104.XIONG Tie-hua,LIANG Shu-guo,ZOU Liang-hao.Dominant failure modes of a transmission tower and itsultimate capacity under wind load[J].Engeering Mechanics,2009,26(12):100-104.
[10]熊铁华,梁枢果,邹良浩.考虑断线时输电铁塔的失效模式及其极限荷载[J],土木工程学报,2009,42(11):86-90.XIONG Tie-hua,LIANG Shu-guo,ZOU Liang-hao.Dominant failure modes of transmission towers and the limitloads with wire breakoff[J].China Civil EngineeringJournal,2009,42(11):86-90.
[11]熊铁华,梁枢果,邹良浩.基于完全气弹模型风洞试验输电塔风荷载识别[J].建筑结构学报,2010,31(10):48-54.XIONG Tie-hua,LIANG Shu-guo,ZOU Liang-hao.Windloading identification of transmission towers based-on windtunnel tests of full aero-elastic model[J].Journal of BuildingStructures,2010,31(10):48-54.
[12]熊铁华,梁枢果,邹良浩,等.大跨越钢管混凝土输电塔线体系的地震响应分析[J].土木工程学报,2010,43(12):7-12.XIONG Tie-hua,LIANG Shu-guo,ZOU Liang-hao,et al.Seismic responses of a long-span concrete filled steel-tubetransmission tower-line system[J].China Civil EngineeringJournal,2010,43(12):7-12.
[13]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.
[2]梁枢果,邹良浩,赵林,等.格构式塔架动力风荷载解析模型[J].同济大学学报(自然科学版),2008,36(2):166-171.LIANG Shu-guo,ZOU Liang-hao,ZHAO Lin,et al.Analytical model of dynamic wind loads on lattice towers[J].Journal of Tongji University:Natural Science,2008,36(2):166-171.
[3]梁枢果,朱继华,王力争.大跨越输电塔-线体系动力特性分析[J].地震工程与工程振动,2003,23(6):63-69.LIANG Shu-guo,ZHU Ji-hua,WANG Li-zheng.Analysis ofdynamic characters of electrical transmission tower-line systemwith a big span[J].Earthquake Engineering andEngineering Vbration,2003,23(6):63-69.
[4]梁波,徐建良.架空输电铁塔动力风响应的数值模拟[J].同济大学学报(自然科学版),2002,30(5):583-587.LIANG Bo,XU Jian-liang.Numerical simulation of along-wind response of transmission towers[J].Journal of TongjiUniversity:Natural Science,2002,30(5):583-587.
[5]梁枢果.输电塔-导线体系风振响应计算与气弹模型风洞试验研究报告[R].上海:同济大学土木工程防灾国家重点实验室访问学者基金资助项目,2002.
[6]楼文娟,孙炳楠,叶尹.高耸塔架横风向动力风效应[J].土木工程学报,1999,32(6):67-71.LOU Wen-juan,SUN Bing-nan,YE Yin.Across-winddynamic response of latticed towers[J].China civilEngineering Journal,1999,32(6):67-71.
[7]梁枢果,邹良浩,赵林,等.输电塔-线体系完全气弹模型风洞试验研究[J].土木工程学报,2010,43(5):70-78.LIANG Shu-guo,ZOU Liang-hao,ZHAO Lin,et al.Study ofwind tunnel tests of a full aero-elastic model of electricaltransmission tower-line systems[J].China Civil EngineeringJournal,2010,43(5):70-78.
[8]邓洪洲,朱松晔,陈晓明,等.大跨越输电塔线体系气弹模型风洞试验[J].同济大学学报(自然科学版),2003,31(2):132-137.DENG Hong-zhou,ZHU Song-ye,CHEN Xiao-ming,et al.Wind tunnel investigation on model of long span transmissionline system[J].Journal of Tongji University:NaturalScience,2003,31(2):132-137.
[9]熊铁华,梁枢果,邹良浩.风荷载下输电铁塔的失效模式及其极限荷载[J].工程力学,2009,26(12):100-104.XIONG Tie-hua,LIANG Shu-guo,ZOU Liang-hao.Dominant failure modes of a transmission tower and itsultimate capacity under wind load[J].Engeering Mechanics,2009,26(12):100-104.
[10]熊铁华,梁枢果,邹良浩.考虑断线时输电铁塔的失效模式及其极限荷载[J],土木工程学报,2009,42(11):86-90.XIONG Tie-hua,LIANG Shu-guo,ZOU Liang-hao.Dominant failure modes of transmission towers and the limitloads with wire breakoff[J].China Civil EngineeringJournal,2009,42(11):86-90.
[11]熊铁华,梁枢果,邹良浩.基于完全气弹模型风洞试验输电塔风荷载识别[J].建筑结构学报,2010,31(10):48-54.XIONG Tie-hua,LIANG Shu-guo,ZOU Liang-hao.Windloading identification of transmission towers based-on windtunnel tests of full aero-elastic model[J].Journal of BuildingStructures,2010,31(10):48-54.
[12]熊铁华,梁枢果,邹良浩,等.大跨越钢管混凝土输电塔线体系的地震响应分析[J].土木工程学报,2010,43(12):7-12.XIONG Tie-hua,LIANG Shu-guo,ZOU Liang-hao,et al.Seismic responses of a long-span concrete filled steel-tubetransmission tower-line system[J].China Civil EngineeringJournal,2010,43(12):7-12.
[13]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.
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