门式刚架柱间支撑设计风荷载计算分析

Analysis on design wind load calculation of portal rigid frame column support

门式刚架轻型房屋钢结构属于风荷载比较敏感建筑,在实际设计过程中,柱间支撑的设计往往会被忽视,给结构安全留下隐患。文章结合现行通用规范修正风荷载计算公式,简述柱间支撑风荷载计算过程中风荷载系数的理论计算方法,并与经验取值所计算的风荷载系数进行对比分析,最后以某项目柱间支撑风荷载计算的实际算例进行验证。结果表明:应在现行《门式刚架轻型房屋钢结构技术规范》中风荷载计算方法的基础上,按照《工程结构通用规范》中要求考虑风荷载放大系数的影响;风荷载系数经验取值与理论取值最终得到的风荷载相差不大,且前者更偏于保守,鉴于经验取值的便捷性,设计人员可按照经验取值用于实际项目设计。

The steel structure of light housing with portal rigid frame is sensitive to wind load.In the actual design process, the design of inter-column support is often ignored, leaving hidden dangers to the structural safety.In this paper, the wind load calculation formula is modified based on the current general norms, and the theoretical calculation method of the stroke load factor in the calculation process of the inter-column supported wind load is briefly described, and the wind load calculated by the empirical value is compared and analyzed.Finally, the actual calculation example of the inter-column supported wind load of a project is verified.The results show that the effect of wind load amplification factor should be considered according to the requirements of the General Code for Engineering Structures on the basis of the current method of calculating the stroke load in the Technical Code for Steel Structures of light houses with rigid frame.There is little difference between the empirical value of the wind load factor and the theoretical value of the wind load, and the former is more conservative.In view of the convenience of the empirical value, designers can use the empirical value for practical project design.