考虑带宽修正的大跨屋盖结构非高斯风压极值估计方法  

Non-Gaussian wind pressure extreme value estimation method for long-span roof structure considering bandwidth modification

作　　者：闫渤文 魏民 刘敏[1] 刘堃 李正良[1] 周绪红[1,3] YAN Bowen;WEI Min;LIU Min;LIU Kun;LI Zhengliang;ZHOU Xuhong(Chongqing Key Laboratory of Wind Engineering and Wind Energy Utilization,School of Civil Engineering,Chongqing University,Chongqing 400045,China;Central Southern China Electric Power Design Institute Co.,Ltd.,China Power Engineering Advisor Group,Wuhan 430000,China;School of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]重庆大学风工程与风资源利用重庆市重点实验室土木工程学院,重庆400045 [2]中国电力工程顾问集团中南电力设计院有限公司,武汉430000 [3]湖南大学土木工程学院,长沙410082

出　　处：《振动与冲击》2022年第19期30-36,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51878104);高等学校学科创新引智计划资助项目(B18062);中国博士后科学基金(2018M631063)。

摘　　要：针对大跨屋盖结构表面风压宽频谱特性与极值风压估计方法问题。提出一种基于带宽修正的高斯转化法求解非高斯风压峰值因子,结合大跨屋盖结构风洞试验,采用该方法和现有极值风压评估方法对大跨屋盖结构表面极值风压开展了系统的对比验证研究。结果表明:高斯峰值因子法估算的大跨屋盖结构表面风压峰值因子明显偏离了非高斯风压的峰值因子;忽略带宽参数的Hermite矩模型高估了非高斯风压的峰值因子;相对于修正带宽的Hermite矩模型和目标概率法,提出的修正带宽高斯转化法与Sadek-Simiu法估计的大跨屋盖结构风压峰值因子更为准确,与试验观测值整体上最接近,且提出的修正带宽高斯转化法得到的结果误差及离散性均较小,能够高效合理地提供大跨屋盖结构表面非高斯风压峰值因子。Here,aiming at wide spectral characteristics of wind pressure on surface of long-span roof structure and estimation method of extreme wind pressure,a Gaussian transformation method based on bandwidth modification was proposed to solve non-Gaussian wind pressure peak factor.Combined with wind tunnel tests of long-span roof structure,the proposed method and the existing extreme wind pressure evaluation method were used to perform a systematic contrastive verification study on extreme wind pressure on surface of long-span roof structure.The results showed that the wind pressure peak factor of long-span roof structure estimated using Gaussian peak factor method obviously deviates from the peak factor of non-Gaussian wind pressure;Hermite moment model ignoring bandwidth parameters overestimates the peak factor of non-Gaussian wind pressure;compared with the modified bandwidth Hermite moment model and the target probability method,the wind pressure peak factor of long-span roof structure estimated with the modified bandwidth Gauss transformation method proposed here or Sadek-Simiu method is more accurate,it is the closest to the test observation value on the whole;the result error and discreteness obtained with the modified bandwidth Gauss transformation method proposed here are smaller,so the proposed method can effectively and reasonably provide non-Gaussian wind pressure peak factor on surface of long-span roof structure.

关 键 词：大跨屋盖结构 非高斯风压 带宽参数 峰值因子 风洞试验 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3