国家体育场钢结构雪荷载效应实测及分析

摘要

应用自主开发的无线传感技术,获得了国家体育场钢结构在降雪过程中的温度与应力变化.基于实测数据,分析积雪对结构温度的影响,将温度应力剔除后得到雪荷载在结构中引起的应力,探讨应力随时间发展的规律及其在结构上的分布规律.结果表明积雪对结构温度有一定影响,雪荷载作用下各部位呈现出不同的受力特征.%By utilizing self-developed wireless sensors,the variation of temperature and stress on the steel structure of the National Stadium during a snowfall was captured.This paper analyzed the temperature distribution of the structure while the snow covered the roof,and calculated the stress caused by snow load by excluding the temperature stress.Then this paper discussed how stress changed over time,and the influence of the snow load to different parts of the structure.The results showed that the snow could affect the structure's temperature,and different parts responsed differently to the snow load.