摘要
基于风洞试验得到的格构式塔架的一阶广义荷载谱(fundamental mode generalized force spectrum,FMGFS),采用沿高度不变的风速谱,再选取Shiotami空间相干函数,由此推导出一种更为简单实用的格构塔架高阶广义荷载谱(higher mode generalized force spectrum,HMGFS)模型。明确给出不同于以往文献的求解共振分量的计算表达式,该表达式更加合理。以沈阳一输电塔工程为例,验证了本文导出模型的准确性,为进一步推导格构塔架的位移反应的实用计算表达式和建立等效静力风荷载计算公式奠定了基础。
A practical higher mode generalized force spectrum (HMGFS) model for lattice towers is proposed by adopting height-independent fluctuating wind spectrum density and selecting Shiotami-Type spatial coherence. The fundamental mode generalized force spectrum (FMGFS) obtained through a wind tunnel test is used. A more rational expression for the resonant component computed through the generalized force spectrum (GFS) is derived. A transmission tower structure in Shenyang is taken as an example to show the accuracy of the HMGFS model.
出处
《土木工程学报》
EI
CSCD
北大核心
2009年第2期53-57,共5页
China Civil Engineering Journal
基金
国家自然科学基金重点项目 (50638010)
教育部创新团队(IRT0518)
高等学校博士点基金 (20060141027)
关键词
风洞试验
高阶广义荷载谱
共振分量
输电塔
等效静力风荷载
wind tunnel test
higher generalized force spectrum
resonant component
transmission tower
equivalent static wind load