后浇带设置问题的深入探讨  

Deep investigation on post-cast strip setting

作　　者：李国胜 Li Guosheng(Tongling Construction Engineering Drawing Design Review Co.,Ltd.,Tongling 244000,China;Tongling Construction Engineering Quality Supervision and Monitoring Co.,Ltd.,Tongling 244000,China)

机构地区：[1]铜陵市建筑工程施工图设计文件审查有限公司,铜陵244000 [2]铜陵市建设工程质量监督监测有限公司,铜陵244000

出　　处：《建筑结构》2019年第3期38-45,37,共9页Building Structure

摘　　要：由于国家规范、规程和有关手册对收缩后浇带和沉降后浇带的设置、构造、配筋和沉降计算无统一规定,对于有些内容,不同规范的规定要求又不一样,甚至互相矛盾,致使在设计中使用比较混乱、关键问题交代不清,设计存在安全隐患。通过对收缩后浇带和沉降后浇带的深入探讨,较全面地回答了如下关键问题:后浇带的设置要求及相关构造;后浇带浇筑时间;结构长度超规范时是否必须设收缩后浇带;高层和裙房之间是否必须设沉降后浇带;设沉降后浇带如何控制沉降差、基础和上部结构内力如何计算等。There is no uniform regulation for the setting,construction,reinforcement and settlement calculation of shrinkage post-cast strip and settlement post-cast strip in national codes,regulations and relative manuals.For some content,the requirements of different codes are different,or even contradictory.As a result,these codes would not been very clearly understood by many designers and are used in disorder in design;the key problems are not clear in design as well,resulting in potential safety hazard in later design.Through the deep investigation of the shrinkage post-cast strip and settlement post-cast strip,some key questions were answered in a relatively comprehensive way,such as setting requirements and related construction of post-cast strip;the casting time of post-cast strip;whether must shrinkage post-cast strip be designed when structural length exceeds the code;whether must settlement post-cast strip be designed between high-rise buildings and podiums;how to control differential settlement and how to calculate the internal force of foundation and superstructure for the settlement post-cast strip designed etc.

关 键 词：收缩后浇带 沉降后浇带 断开模型 整体模型 补偿收缩混凝土 膨胀剂 后期沉降差 附加内力 

分 类 号：TU318[建筑科学—结构工程] TU755