直线输电塔横梁变化抗震性能反应分析
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摘要
输电塔结构性能比较高效,适用性很强,广泛地应用到电力工程中。采用SAP2000对横梁数量不同的三种输电塔结构在地震作用下进行动力时程分析,比较几种输电塔结构的抗震动力响应。计算结果表明,随着横梁数量变多,输电塔的整体刚度就变大,模态分析中的周期减小,同时结构的顶点位移和加速度也减小了,可是,结构的钢材料杆件的轴力和固定支座的反力却增大了,因此在地震中,横梁数量越多,结构抗震性能不一定越好。要合理布置横梁数量,优化结构抗震性能。
The transmission tower structure has good architectural applicability and potential efficient structure and properties so it is more and more widely used in power engineering.Article using the finite element software SAP2000 analyzes several transmission tower structure uniformly arranged with the increase in the number of transmission towers cross beams by linear time history analysis in the earthquake.The conclusion has been made as follow: Increasing the crossbeam increases the stiffness of the whole structure.When the quantity of cross beams increases and cross beams arrange symmetrically,period of the structure,speed,acceleration of the vertex decreases but rod axial force,the bearing reaction force increases.Therefore reasonable arrangement of the beams of the structure should be designed,enhancing the seismic performance.
The transmission tower structure has good architectural applicability and potential efficient structure and properties so it is more and more widely used in power engineering.Article using the finite element software SAP2000 analyzes several transmission tower structure uniformly arranged with the increase in the number of transmission towers cross beams by linear time history analysis in the earthquake.The conclusion has been made as follow: Increasing the crossbeam increases the stiffness of the whole structure.When the quantity of cross beams increases and cross beams arrange symmetrically,period of the structure,speed,acceleration of the vertex decreases but rod axial force,the bearing reaction force increases.Therefore reasonable arrangement of the beams of the structure should be designed,enhancing the seismic performance.
引文
1李宏男,石文龙.大跨越高压输电塔体系抗震分析几个关键问题研究[A].防震减灾工程研究与进展——全国首届防震减灾工程学术研讨会论文集[C].防震减灾工程研究与进展,2004:1-6.
2尹荣华,李东亮,刘戈林,等.高压输电塔震害及抗震研究[J].世界地震工程,2005,23(1):51-54.
3李宏男,白海峰.高压输电塔——线体系抗灾研究的现状与发展趋势[J].土木工程学报,2007,40(2):38-41.
4瞿伟廉,殷惠君,陈波.输电线路动力分析的多质点模型研究[J].华中科技大学学报,2003,20(2):1-5.
5沈国辉,孙炳楠,何运祥,等.大跨越输电塔线体系的地震响应研究[J].工程力学,2008,25(11):212-217.
6Harikrishna P,Shanmugasundaram J,eta.l Analytical and experi-mental studies on the gust response ofa 52mtall steel lattice tower underwind loading[J].Comput.&struct.,1999,70:149-160.
7付鹏程,邓洪洲,吴静.输电塔动力特性研究[J].特种结构,2005,22(1):47-49.
8GB50260-96,电力设施抗震设计规范[S].
9GB50011-2001,建筑抗震设计规范[S].
10GB50545-2010,110kV～750kV架空输电塔线路设计规范[S].
2尹荣华,李东亮,刘戈林,等.高压输电塔震害及抗震研究[J].世界地震工程,2005,23(1):51-54.
3李宏男,白海峰.高压输电塔——线体系抗灾研究的现状与发展趋势[J].土木工程学报,2007,40(2):38-41.
4瞿伟廉,殷惠君,陈波.输电线路动力分析的多质点模型研究[J].华中科技大学学报,2003,20(2):1-5.
5沈国辉,孙炳楠,何运祥,等.大跨越输电塔线体系的地震响应研究[J].工程力学,2008,25(11):212-217.
6Harikrishna P,Shanmugasundaram J,eta.l Analytical and experi-mental studies on the gust response ofa 52mtall steel lattice tower underwind loading[J].Comput.&struct.,1999,70:149-160.
7付鹏程,邓洪洲,吴静.输电塔动力特性研究[J].特种结构,2005,22(1):47-49.
8GB50260-96,电力设施抗震设计规范[S].
9GB50011-2001,建筑抗震设计规范[S].
10GB50545-2010,110kV～750kV架空输电塔线路设计规范[S].
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