格构塔架顺风位移响应实用计算模型与求解内力位移加载法  

A practical calculation model and approach for along-wind displacement responses of lattice towers

作　　者：柳国环[1] 李宏男[1] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116024

出　　处：《振动工程学报》2009年第1期1-5,共5页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目资助(50638010);教育部创新团队基金资助项目(IRT0518);高等学校博士点基金助项目(20060141027)

摘　　要：基于风洞试验得到的格构式塔架顺风向一阶广义荷载谱,利用导出的实用高阶广义荷载谱,进一步导出了位移反应的实用计算公式,提出了"位移加载"求解格构塔架内力的方法,并以一输电塔为例描述了该方法的实现过程。与已有方法相比,计算公式可考虑高阶模态的贡献且推导过程更加合理,建议的内力求解方法可避免传统方法中需要建立等效静力风荷载的这一步骤。针对格构式高耸结构,文中位移计算公式实用,内力求解方法合理、操作简单,可进一步推广应用。A practical calculation model, based on the fundamental mode generalized force spectrum obtained in a wind tunnel test and practical higher mode generalized force spectrum model in along-wind direction of lattice tower, is further deduced and proposed to calculate along-wind displacement responses of lattice tower. In the proposed model, the contributions of higher vibration modes can be taken into account. Then, a new approach, by applying load with displacement instead of force, is presented and recommended to calculate internal forces of lattice towers. Moreover, a transmission tower structure is taken as an example to describe specific implementation process of the approach. Comparing with conventional method, the recommended approach, not requiring getting equivalent static wind loads （ESWLs）, is reasonable, simple and of value to be popularized.

关 键 词：风洞试验 广义荷载谱 输电塔 等效静力风荷载 

分 类 号：P315.9[天文地球—地震学] U442[天文地球—固体地球物理学]