自重对输电铁塔的风振响应和地震响应分析  

Dead weight's influence on seismic response and wind vibration response of transmission iron-tower

作　　者：马宏伟[1] 罗英[1] 彭福明[1] 郝际平[1] 默增录 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]国家电力公司,北京100000

出　　处：《长安大学学报（自然科学版）》2002年第6期58-60,共3页Journal of Chang’an University(Natural Science Edition)

摘　　要：通过 ANSYS对某 3 5 m高输电铁塔结构的振型及自振周期的分析 ,研究了自重对铁塔这类高柔结构振动特性的影响 ,并在此基础上分析了因振动特性的变化对铁塔地震响应和风振响应的影响。结果表明自重使铁塔的基本周期有显著的增大 ,更接近地震的卓越周期 ,铁塔的地震动响应比起风振动响应有显著的增大。Via the analysis of a 35 meter high transmission iron-tower's vibration mode and self-vibration period by ANSYS, the influence of dead weight on the vibration behavior of the high and flexible structure such as iron-tower is studied, and based on the result the variation of vibration behavior's influence on the seismic response and wind vibration response of the iron-tower are also analyzed. The result indicates that the dead weight remarkably increases the iron-tower's base period, and the base period is more close to the earthquake prominent period, the iron-tower seismic response is enlarged more than the wind vibration response.

关 键 词：自重 输电铁塔 风振响应 地震响应 单点反应谱 振动特性 

分 类 号：TU311.3[建筑科学—结构工程] TU24