翁  赟，  赵国兴，  阚建忠，  余祖国，  干  钢，  金居高
    （浙江大学建筑设计研究院，杭州 310027）

[摘要] 金华体育中心体育场东西看台结构设计中采用了超长混凝土框架结构体系，为防止混凝土收缩及温度下降，在结构中出现有害的贯通裂缝，设计中采取沿环向隔跨布置诱导槽以及环向框架梁内设置预应力钢筋两项措施。本文主要介绍了诱导槽的工作原理，使温度应力重分布，降低了大部分看台区域内的拉应力；同时，通过有限元程序分析，论证了预应力钢筋的设置，能够有效降低结构梁、板内的拉应力，提高结构的抗裂性能。
[关键词] 超长混凝土结构；预应力；温度应力；诱导槽；有限元
中图分类号：TU375.4  文献标识码：A  文章编号：1002-848X(2011) S1-0632-04

FEM analysis of temperature stress for the stadium in Jinhua Sport Center
    Weng Yun, Zhao Guoxing, Kan Jianzhong, Yu Zuguo, Gan Gang, Jin Jugao
    ( Architectural Design and Research Institute of Zhejiang University, Hangzhou 310027, China)

Abstract: The super-long concrete frame structure was applied in the stadium grandstand of Jinhua Sport Center. In order to prevent the appearance of harmful cracks, caused by the shrinkage of concrete and fall of temperature, two technologies were applied, one is induction grooves which were set every other span along the direction of circumference, the other is post-tensioned pre-stressed design method set in beams along the direction of circumference. The effects of induction grooves which is redistributing the temperature stress and reducing the tensile stress in the most region of grandstand are discussed in this paper. Meanwhile, the FEM analysis proved that the tensile stress in beams and slabs can be effectively reduced and the appearance of cracks in the structure can be prevented by the applying of pre-stressed method.
Keywords: super-long concrete structure; pre-stressed; temperature stress; induction groove; FEM