超长混凝土结构温度应力分析与设计措施

Temperature stress analysis and design measures for ultra-long concrete structure

温度变化对超长混凝土结构的变形和内力存在较大影响。某工程位于成都市新津区,设计为1层地下室(局部2层地下室)。该地下室采用混凝土结构,平面尺寸达到600 m×53 m。出于保证使用功能考虑,要求整体地下室方案不设温度伸缩缝。为解决这一问题,设计人员提出了一些结构设计分析方法,并引入应力释放带,利用YJK结构设计软件对地下室顶板的温度应力进行评估,通过分析结果提出了控制地下室温度裂缝的措施,与现场修建完成后的实际情况对比,验证了该措施的有效性。

Temperature change has a great influence on the deformation and internal force of ultra-long concrete structure.The project is located in Xinjin District,Chengdu City,and is designed as 1 basement(part 2 basement).The basement is made of concrete structure with a plane size of 600 m×53 m.In order to ensure the use function,the overall basement scheme does not set temperature expansion joint.To solve this problem,the designer put forward some structure design analysis method,and introduce the stress release belt,using YJK structure design software to evaluate the temperature stress of the basement roof,through the analysis of control basement temperature crack measures,through the completion of the actual situation,to verify the effectiveness of the measures.