超高层建筑施工期温度效应监测与分析  

Research on thermal effects of supertall structures during construction stage

作　　者：朱宏平[1] 高珂 翁顺[1] 高飞[1] 夏勇[2] Zhu Hongping;Gao ke;Weng Shun;Gao Fei;Xia Yong(Huazhong University of Science and Technology,Wuhan 430074,China;The Hong Kong Polytechnic University,Hong Kong 999077,China)

机构地区：[1]华中科技大学,湖北武汉430074 [2]香港理工大学,中国香港999077

出　　处：《土木工程学报》2020年第11期1-8,共8页China Civil Engineering Journal

基　　金：国家自然科学基金(51629801,51922046,51838006)。

摘　　要：超高层建筑施工期受日照等环境因素影响,温度场分布不均匀,使结构产生不均匀变形和应力,进而影响施工质量和结构安全。文章基于一座335m超高层实际监测数据,研究了其施工期结构温度分布特点及其应力应变演化规律。结果表明,超高层建筑的外框与核心筒之间,以及结构的不同方位之间,均存在明显的不均匀温度分布,其不均匀程度随着季节而变化。结构在不均匀温度影响下产生不均匀应力变化,外框架竖向应力与季节性温度呈负相关性,主梁在季节温差影响下存在受拉开裂风险。研究成果对提高超高层施工质量、增强其运营期安全性和耐久性具有指导意义。The nonuniform distribution of temperature on supertall structures during construction stage leads to nonuniform deformation and stress, which influence the construction quality and safety of supertall structures.This paper investigates the temperature distribution and stress development of in-construction supertall structures by analyzing the monitoring data of a 335 m-high supertall building.The results show that nonuniform temperature distribution and nonuniform temperature variation existed between the outer frame and the inner walls and that between different facades of the supertall structure.The extent of the nonuniformity varies with seasons.Nonuniform temperature distribution results in different stress variation.The vertical stress of the outer column varies with the seasonal change of the temperature.The girder suffers cracking risk under the influence of seasonal temperature variation.The results are advantageous to improve the construction quality and safety of supertall structures.

关 键 词：超高层 温度效应 施工监测 

分 类 号：TU973[建筑科学—结构工程]