索参数对斜拉结构固有频率的影响分析
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摘要
结构固有频率是表征结构动力特性、评价结构舒适度的重要指标。本文以深圳市大梅沙万科中心为背景,通过参数敏感性分析研究了索的截面面积、索位置、索倾角以及索张力等参数对结构固有频率的影响规律,其研究结果对斜拉结构动力特性受结构参数影响方面的研究具有一定的参考意义。
Natural frequency of a cable-stayed structure is an important paramter which can reflect structural dynamic characteristics and evaluate the comfort degree of a structure.Based on the Shenzhen Dameisha Vanke Center,a finite element model is established.The sensitivity of the natural frequency of a cable-stayed structure to the change of main cable-parameters such as cross-sectional areas,the positions of cables,declining angles,and tensions of cables is studied.The rules given in this paper will give a reference value on effects of the main cable-parameters upon the natural frequency of a cable-stayed structure.
Natural frequency of a cable-stayed structure is an important paramter which can reflect structural dynamic characteristics and evaluate the comfort degree of a structure.Based on the Shenzhen Dameisha Vanke Center,a finite element model is established.The sensitivity of the natural frequency of a cable-stayed structure to the change of main cable-parameters such as cross-sectional areas,the positions of cables,declining angles,and tensions of cables is studied.The rules given in this paper will give a reference value on effects of the main cable-parameters upon the natural frequency of a cable-stayed structure.
引文
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[5]蔺鹏臻,刘凤奎.拉索对斜拉桥体系面内弯曲频率的影响分析[J].城市道桥与防洪,2005,3(2):41～43Lin Peng-zhen,Liu Feng-kui.The Analysis of Influencefrom Cablkes of Cable-stayed Bridge System to Its In-plane Curl-frequency[J].Urban Roads Bridges&FloodControl,2005,3(2):41～43(in Chinese)
[6]沈祖炎,周岱,龚铭.斜拉网壳结构构件单元分析及结构动力性能[J].同济大学学报.2004,28(2):127～133Shen Zu-yan,Zhou Dai,Gong Ming.Analysis of theTower-column Element and Cable Element as well as theDynamic Properties for Cable-stayed Reticulated ShellStructures[J].Journal of Tongji Universuty,2004,28(2):127～133(in Chinese)
[7]赵翔.拉索损伤对斜拉桥结构性能影响的研究[D].南京:东南大学,2005:13～14Zhao Xiang.The Study of the Influence of CablesDamage to Cable-stayed Bridge Performance[D].Southeast University,2005:13～14(in Chinese)
[8]杨佑发,白文轩,魏建东.采用Ernst公式计算斜拉桥拉索振动特性的精度分析[J].世界地震工程,2008,24(2):50～53Yang You-fa,Bai Wen-xuan,Wei Jian-dong.Precisionanalysis of dynamic characteristic of cable using Ernst'smodified formula in cable-stayed bridge[J].WorldEarthquake Engineering,2008,24(2):50～53(in Chinese)
[2]郝文秀,徐晓,刘京红,等.斜拉局部3层网架结构静力及动力特性分析[J].四川建筑科学研究,2007,33(3):113～115Hao Wen-xiu,Xu Xiao,Liu Jing-hong,et al.Analysis ofstatic and dynamic characteristic about cable-stayedpartial three-layer spatial grid structure[J].SichuanBuilding Science,2007,33(3):113～115(in Chinese)
[3]刘凤奎,蔺鹏臻,等.矮塔斜拉桥特征参数研究[J].工程力学,2004,21(2):199～203Liu Feng-kui,Lin Peng-zhen,et al.Investigation ofCharac-Teristic Parameters of Cable-stayed Bridge withLow Towers[J].Engineering Mechanics,2004,21(2):199～203(in Chinese)
[4]上官萍,蔡鹏程,卓卫东,房贞政.部分斜桥体系参数对动力特性的影响分析[J].福州大学学报(自然科学版),2007,35(6):888～892Shangguan Ping,Cai Peng-cheng,Zhuo Wei-dong,Fang Zhen-zheng.Parameter infiuencing analysis ondynamic characteristic of extradosed PC bridge[J].Journal of Fuzhou University(Natural Science),2007,35(6):888～892(in Chinese)
[5]蔺鹏臻,刘凤奎.拉索对斜拉桥体系面内弯曲频率的影响分析[J].城市道桥与防洪,2005,3(2):41～43Lin Peng-zhen,Liu Feng-kui.The Analysis of Influencefrom Cablkes of Cable-stayed Bridge System to Its In-plane Curl-frequency[J].Urban Roads Bridges&FloodControl,2005,3(2):41～43(in Chinese)
[6]沈祖炎,周岱,龚铭.斜拉网壳结构构件单元分析及结构动力性能[J].同济大学学报.2004,28(2):127～133Shen Zu-yan,Zhou Dai,Gong Ming.Analysis of theTower-column Element and Cable Element as well as theDynamic Properties for Cable-stayed Reticulated ShellStructures[J].Journal of Tongji Universuty,2004,28(2):127～133(in Chinese)
[7]赵翔.拉索损伤对斜拉桥结构性能影响的研究[D].南京:东南大学,2005:13～14Zhao Xiang.The Study of the Influence of CablesDamage to Cable-stayed Bridge Performance[D].Southeast University,2005:13～14(in Chinese)
[8]杨佑发,白文轩,魏建东.采用Ernst公式计算斜拉桥拉索振动特性的精度分析[J].世界地震工程,2008,24(2):50～53Yang You-fa,Bai Wen-xuan,Wei Jian-dong.Precisionanalysis of dynamic characteristic of cable using Ernst'smodified formula in cable-stayed bridge[J].WorldEarthquake Engineering,2008,24(2):50～53(in Chinese)
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