大跨空间结构温度效应分析与合拢温度研究  

Analysis of temperature effect and determination of temperature upon healing of large-span spatial structures

作　　者：田黎敏[1] 郝际平[1] 王媛 郑江[1] 

机构地区：[1]西安建筑科技大学,陕西西安710055 [2]中国建筑西北设计研究院,陕西西安710003

出　　处：《土木工程学报》2012年第5期1-7,共7页China Civil Engineering Journal

基　　金：国家自然科学基金(50878181);高等学校博士学科点专项科研基金(20096120110004)

摘　　要：温度对建筑结构的影响主要体现在应力和变形两方面。对于大跨度空间钢结构,由于结构形式复杂,合拢过程周期较长,结构共同受力、协调变形的过程要比其他结构复杂得多,所以在设计和施工中应予以重视。结合世界大学生运动会主体育场结构工程,对温度作用进行理论计算和模拟分析,明确提出计算大跨度空间结构合拢的温度差值,并将部分理论计算结果同实际监测结果进行对比,验证了温度应力有限元模拟方法的正确性。利用有限单元法计算合拢杆件在不同时段的温度应力,从而确定体育场结构适宜的合拢时段,并在此基础上给出一些关于合拢施工的建议和意见,为大跨度空间钢结构的合拢施工提供参考。Temperature affects the deformation and stress of structure. Because large-span spatial steel structures are complex, the process of healing is more complicated than other structures and the influence of temperature is greater. For this reason, temperature action should be taken into account in structure design and construction. With the project of main stadium for the Universidad Sports Centre, theoretical analysis and research of temperature action is discussed in the paper. The difference in the temperature of healing for large-span spatial structures is proposed and the results from theory and practice are compared. It is feasible to simulate temperature stress by using the finite element method for the largespan structure. Finally, temperature stresses of healing members at different times are calculated using the finite element method. In addition, the optimal time of healing is obtained. On this basis, the paper also gives some suggestions and comments about the healing construction. These results provide a reasonable basis for the healing construction.

关 键 词：大跨度空间结构 温度作用 温度应力 合拢 有限元分析 

分 类 号：TU393.3[建筑科学—结构工程]