某超长地下室混凝土结构防裂分析及设计  

Analysis and design of cracks control on overlong basement concrete structure

作　　者：高骕 徐自国 颜锋 严开涛 Gao Su;Xu Ziguo;Yan Feng;Yan Kaitao(Beijing R&F Properties Development Co.Ltd,Beijing 100022,China)

机构地区：[1]北京富力通达房地产开发有限公司

出　　处：《建筑科学》2019年第9期134-141,共8页Building Science

摘　　要：近年来越来越多的超长混凝土工程采用了不设伸缩缝的结构设计策略,在适应现代建筑功能与使用需求的同时,也对超长混凝土结构的防裂分析与设计提出了更高要求。本文结合某商业综合体项目,介绍了针对其地下室进行的考虑建造施工过程的超长混凝土结构温度应力变化分析,并与不考虑施工过程的极端温差作用的应力简化分析方法进行了对比。结果表明,不考虑施工过程的极端温差作用简化分析方法给出的构件拉应力偏小,在抗裂设计应用中应仔细判断。本文给出了设计采取的配筋加强措施以及施工建议,可供结构设计人员参考。The strategy of without expansion and contraction joint is widely adopted for overlong concrete structure design for purpose of meeting the architectural function and usage requirements in recent years.In the meanwhile more refined analysis and strict anti-cracking design should be applied.By taking one commercial engineering project as case,the numerical analysis on the influence of concrete shrinkage,temperature variations and creep toward to overlong concrete structure with considering the construction procedure and sequence is described herein and compared with the results by simplified analysis of extreme value of temperature variation.The results show that the tension stresses of concrete members are underestimated by simplified analysis and needed to notice.The reinforcement design measures and suggestions for construction which are helpful for structural engineers are also proposed in the paper.

关 键 词：超长混凝土结构 温度应力 裂缝控制 

分 类 号：TU93[建筑科学—结构工程]