变截面脱硫塔风振效应及等效风荷载研究  

Research onWind Vibration Effect and EquivalentWind Load of a Desulphurization Tower with Variable Cross-sections

作　　者：李阳 张庆华 杨辉 汪志昊 赵金明 LI Yang;ZHANG Qinghua;YANG Hui;WANG Zhihao;ZHAO Jinming(School of Civil Engineering and Communication,North China University ofWater Resources and Electric Power,Zhengzhou 450000,China;China Construction Third Engineering Bureau Group Co.,Ltd.,Wuhan 430064,China)

机构地区：[1]华北水利水电大学土木与交通学院,郑州450000 [2]中建三局集团有限公司,武汉430064

出　　处：《噪声与振动控制》2024年第3期233-239,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51878274);中建股份科技研发课题资助项目(CSCEC-2021-Q-63);河南省高等学校重点科研资助项目(22A410003)。

摘　　要：变截面是工程设计中常见的结构类型,此类结构风效应在现行规范中受到的关注较少,规定仍较为粗糙。以某高耸脱硫塔为研究对象,综合时、频域数值仿真,详细研究圆柱形分段变截面高耸结构顺、横风向的风致动力响应特性,探讨了横风向涡激共振的判定及计算方法,对比分析变截面圆柱结构常见等效静力风荷载计算方法的差异及结果的可靠性。研究表明,结构第1阶模态是圆柱形变截面脱硫塔风效应的控制振型;应重点关注此类结构上部涡激振动对横风向响应的贡献;鉴于脱硫塔风致振动以共振响应为主,采用惯性力法或三分量(平均、背景和共振)法计算等效风荷载更符合实际分布规律。时、频域分析结果与我国现行规范《建筑结构荷载规范》(GB 50009-2012)计算结果吻合较好,可为分段式变截面高耸结构精细化风振效应研究提供工程参考和依据。Variable cross-section is a common type of structure in engineering design.Wind effect of this structure has received less attention in the current codes,and the regulation is still rough.In this paper,a high-rise desulfurization tower is taken as an object.With integrating the time domain and frequency domain numerical simulations,the wind-induced dynamic response characteristics of its cylindrical high-rise structure with multistage variable cross-sections in along-wind and across-wind directions are studied in detail.The judgement and calculation methods of vortex-induced resonance are discussed.The difference and reliability of the common calculation methods of equivalent static wind load applied to such a structure are analyzed.The results show that the first mode of the structure is the dominant mode of the wind effect of this kind of desulfurization tower,and the contribution of the upper vortex-induced vibration of this kind of structure to the across-wind response should be paid more attention.Since the wind-induced vibration of the desulphurization tower is mainly resonance response,equivalent wind load calculated by methods of Inertia Wind Load or three components(mean,background and resonant)is more consistent with the actual distribution law.In addition,the results of the time domain and frequency domain analyses agree well with the results of Chinese current code(GB 50009-2012).This work may provide an engineering reference and basis for the study of fine wind vibration effect of high-rise structures with multistage variable cross-sections.

关 键 词：振动与波 变截面脱硫塔 横风向风振 涡激共振 荷载规范 等效静力风荷载 

分 类 号：TU312.1[建筑科学—结构工程] TU333