摘要
大跨空间钢屋盖结构在正常使用过程中活荷载多变、结构应力复杂,为准确评价结构在正常使用过程中的安全性需要对结构关键杆件的应力进行持续监测.本文以西宁体育场为例,对其在正常使用过程中的关键杆件应力进行了实时在线监测,得到了结构关键杆件应力随时间变化曲线,并通过有限元软件ANSYS模拟了温度荷载的变化对结构杆件应力的影响.研究结果表明:现场实测数据与模拟值数据吻合较好;关键杆件应力稳中有变;温度荷载对结构杆件应力影响大.
The live load of large-span steel structure is changeable and the stress is complex. In order to accurately evaluate the safety of the structure under the normal conditions, the stress of the key members should be monitored sustainably. Taking Xining Stadium as an example, real-time and on-line monitoring of the stress of the key members in the stage of using is carried out, the stress of the key member variation with time is obtained. At the same time, the finite element software ANSYS is used on simulate the effect of temperature on the stress of the key members. The results show that the theoretical values and the measured data are in good agreement. The stress of key members is in a steady state with some small changes. The temperature has a great effect on the stress of structural elements.
出处
《空间结构》
CSCD
北大核心
2013年第4期81-87,共7页
Spatial Structures
基金
国家自然科学基金资助项目(51068019)
甘肃省建设科技攻关项目(JK-2012)
关键词
空间管桁架结构
西宁体育场
健康监测
温度荷载
space pipe truss structure
Xining Stadium
health monitoring system
temperature load
