西宁某体育馆钢屋盖卸载模拟分析及现场监测  

Unloading Simulation Analysis and the Field Monitoring for Xining Gymnasium Steel Roof

作　　者：王秀丽[1] 梁宝祥[1] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《施工技术》2013年第20期39-43,共5页Construction Technology

基　　金：国家自然科学基金项目(51068019);甘肃省建设科技攻关项目(JK-2012)

摘　　要：大跨度钢屋盖施工过程中受力情况与成型后是不同的,需考虑施工过程中结构体系的变化。结合西宁海湖体育中心体育馆屋盖支撑卸载工程的施工特点,给出其支撑卸载的总体方案,并对其结构位移及关键杆件的应力进行实时监测;同时,应用ANSYS有限元软件分析其卸载过程,确定卸载过程中关键杆件应力和结构变形的变化范围,并与实测数据对比分析。结果表明,结构屋盖支撑卸载后各测点的竖向高程均符合设计要求,其关键杆件的内力相对其卸载前的应力变化不大,且所有杆件的应力随卸载过程的进行变化都比较平缓,符合设计要求。The change of the structural system must be considered in the construction process as the force of the large-span steel roof is different in the construction process and when it is completed. The paper raises the overall plan and monitors the structural displacement and the stress of the key joints in real time combining with the characteristics of the unloading engineering of Xining Gymnasium roof support. At the same time, the variation of the key rods＇ stress and structural deformation is confirmed and compared with the measured data using the software of finite element software ANSYS. The results show that the vertical altitudes accord with the design demands after unloading the roof support, the change of the stress in key rods is small comparing with that before unloading, and the change of the stress of all rods is slow during unloading.

关 键 词：钢结构 屋盖 卸载 数值模拟 监测 

分 类 号：TU758.11[建筑科学—建筑技术科学] TU311.41