拉萨体育场温差效应分析及技术措施研究
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(中国航天建筑集团有限公司, 北京 100071)[摘要]拉萨体育场下部看台及上部钢桁架均采用无缝设计方案，超长结构所致的温差效应显著，采用有限元方法对混凝土的收缩和徐变以及整体结构的温度作用效应进行了详细的分析，得到温度应力分布的规律及数值。在分析结果的基础上，对不同部位采取不同的技术措施，有效地解决了温差收缩效应带来的不利影响，对类似超长结构设计有一定的参考价值。[关键词]拉萨体育场; 温差效应; 温度应力; 技术措施中图分类号：P426.62+1 文献标识码：A 文章编号：1002-848X(2013)s1-0658-04Analysis of temperature effect and technique measures on LASA StadiumTian Ruijun(China Aerospace Construction Group Co. , Ltd. , Beijing 100071, China)Abstract: The seamless designation was adopted by the grandstand and the upper steel truss of LASA Stadium. Temperature effect caused by the super-long structure is significant. The temperature variation and shrinkage effects of the structure were analyzed in details by using FEM, and the distribution of temperature stress was obtained. Based on the analysis results, different technique measures were taken, which effectively reduced the negative results caused by temperature variation and shrinkage effects. The experience in the project could be a useful reference for similar structure.Keywords: LASA Stadium; Temperature effect; temperature stress; technique measures作者简介：田瑞俊，硕士，工程师，一级注册结构工程师, Email:Tianruijun521@yahoo.com.cn。
