（吉林省建苑设计集团有限公司第五设计研究院， 长春 130011）

［摘要］在温度荷载作用下，超长混凝土结构的地下室顶板会经常出现温度裂缝。本文采用MIDAS/Gen软件对吉林省长春市某超长混凝土结构进行了温度荷载模拟分析，按工程的实际情况施加温度荷载，获得了该结构在不利温度荷载工况下的温度应力分布特点，并依据分析结果对需要加强的部分进行了不同程度的加强。模拟结果表明在结构刚度突变位置的温度应力较大，刚度改变越大所分担的温度应力也就越大，同时该结果也证明了规范中对钢筋混凝土结构伸缩缝最大距离限制的必要性。

［关键词］MIDAS/Gen； 超长地下混凝土结构； 温度应力； 刚度突变

中图分类号： TU375 文献标识码： A文章编号：  1002-848X(2016)S1-0672-05

Study on the temperature stress influence of super-long concrete structure with MIDAS/Gen 

Jiang Haichuan, Sun Qifeng, Cheng Yingming, Huo Zhenxing， Bai Chunzhen

(Jilin Provincial Building Design & Research Institue Company, The Fifth Design and Research Institute, 

Changchun 130011, China)

Abstract: The super-long concrete structures′ roof often have some crack under the effect of temperature.  A concrete structure in Changchun City, Jilin Province, which is larger than the limit in Code for design of concrete structures was analyzed by the software of MIDAS/Gen. The structure was given the actual temperature load to get the distribution of stress, and use the result to enhance the structure. The simulation result indicates a phenomenon that the place where has the bigger stiffness change the bigger stress will be added, and the result can prove that the necessity to limit the size of concrete structure. 

Keywords: super-long concrete structures′ roof; temperature stress; stiffness change

作者简介：姜海川，硕士，工程师,Email：15844151907@163.com。