摘要
大跨屋盖边缘区域风荷载表现出明显的非高斯特性,为确定非高斯风压时程的极值风压,并与传统的风荷载理论所采用的峰值因子法相衔接,采用Hermite矩模型将非高斯风压时程变换为高斯时程,计算高斯时程的峰值因子,然后通过逆变换得到非高斯时程的峰值因子.通过对大跨鞍型屋盖的风洞实验数据进行处理,得到不同工况下屋面各测点的峰值因子,并对其特性进行系统分析.实测负向峰值因子与计算峰值因子的对比结果表明,计算峰值因子具有较好的计算效果.
The wind load on the edge region of the large span roof shows obvious non-Gaussian characteristics. In order to determine the extreme wind pressure of non-Gaussian time history of pressure and converge the peak factor method of tradition calculation methods of wind load, this paper uses moment-based Hermite model to transform non-Gaussian wind pressure time history to Gaussian time history, then calculates the peak factor of Gaussian time history, the peak factor of non-Gaussian time history calculated by the inverse transformation. Based on the wind tunnel experiment data of large span saddle roof, this paper obtains the peak factor of each measuring point of the roof under different conditions, and analyses the characteristics systematically.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2013年第4期128-133,共6页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
高等学校博士学科点专项科研基金资助项目(20120009110037)
中央高校基本科研业务费专项资金资助(2012JBM007
2010JBZ011)
关键词
风效应
非高斯风压
峰值因子
软化过程
硬化过程
wind effects
non-Gaussian wind pressure, peak factor, softening process, hardening process
