高烟囱横风向荷载规范条文的修正建议  

Suggestions on Amendments to Code Clauses for Across-wind Loads of Tall Chimneys

作　　者：黄楠 王峥 刘佳 璩华云 王磊[2] Huang Nan;Wang Zheng;Liu Jia;Qu Huayun;Wang Lei(Central Southern China Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Wuhan 430071,China;School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]中国电力工程顾问集团中南电力设计院有限公司,武汉430071 [2]河南理工大学土木工程学院,焦作454000

出　　处：《特种结构》2023年第1期1-7,14,共8页Special Structures

基　　金：国家自然科学基金(51708186);建筑安全与环境国家重点实验室暨国家建筑工程技术研究中心开放课题基金(BSBE2020-5)。

摘　　要：高烟囱因涡激共振而发生破坏的案例屡见不鲜,大量研究表明,规范计算结果与现场实测结果有显著差异,在一定程度上反映了相关规范的不足。针对这一问题,本文对比分析不同国家规范在计算高烟囱横风向等效风荷载过程中对关键参数的取值差异,并基于大量现场实测结果的统计分析,对中国规范等效风荷载计算方法中一些关键参数的取值给出了初步修正建议。最后将修正算法的计算结果与大量实测结果进行对比,证实了修正后的计算结果与实测结果更为吻合。本研究可为相关规范条文的完善和修订提供参考。It is not uncommon for tall chimneys to be damaged by vortex-induced vibrations.Many studies have shown that there are significant differences between the calculation results of wind load code and the measured results,which reflects the insufficiency of the relevant codes to a certain extent.In this paper,difference values of key parameters in the calculation of the equivalent wind load of tall chimneys in across-wind direction according to different national codes are compared and analyzed.Based on the statistical analysis of many on-site measured results,preliminary revision suggestions are proposed for some key parameters in the calculation of equivalent wind load in Chinese codes.Finally,the calculated results of the revised method are compared with many measured results,which proves that the revised calculated results are more consistent with the measured results.This study provides a reference for the revision of relevant code.

关 键 词：烟囱 等效风荷载 风荷载规范 涡激振动 

分 类 号：TU973.213[建筑科学—结构工程]