多腔体多边形钢管巨柱全过程试验研究
  • 作者: 翁邦正, 侯川川, 王文渊,等
论文摘要

多腔体多边形钢管巨柱全过程试验研究*

翁邦正1 侯川川2 王文渊1 乔稳超1 杨猛1

(1.中国建筑第二工程局有限公司,北京 100160; 2.北京航空航天大学交通科学与工程学院,北京 100191

[摘要]春之眼商业中心项目关键结构采用钢-混凝土组合结构,对于多腔体多边形钢管巨柱,型钢和混凝土的良好黏结对组合结构发挥力学性能至关重要。巨柱中采用了C65 自密实混凝土,工程经验表明高强混凝土早期的自收缩较大;高强混凝土中胶凝材料用量的增大,同样导致了混凝土水化放热增快、温升增高。对浇筑及养护过程中巨柱钢管侧壁承受的压力以及巨柱中混凝土的收缩应变进行试验测试和研究分析,结果表明,该项目多腔体多边形钢管巨柱钢管混凝土施工质量符合要求。

[关键词]高层建筑;钢-混凝土组合结构;多腔体;多边形;钢管巨柱;混凝土;应变;试验

[中图分类号]TU974     [文献标识码]A     [文章编号]1002-8498(2021)18-0125-04

Experimental Research on the Whole Process of Multi cavity Polygonal Steel Pipe Giant Column  

WENG Bangzheng1, HOU Chuanchuan2, WANG Wenyuan1, QIAO Wengchao1, YANG Meng1

(1. China Construction Second Engineering Bureau Ltd., Beijing 100160, China; 2. School of Transportation Science and Engineering, Beihang University, Beijing 100191, China)

Abstract:The key structures of Spring Eye Commercial Center Project are all steel concrete composite structures. For a multi cavity polygonal steel tube giant column, a good bonding of section steel and concrete is by no means essential for the mechanical properties of the composite structure. C65 self compacting concrete was adopted in the giant column. According to engineering practice, high strength concrete has a relatively large auto shrinkage in the early stage, and the increase in the amount of cementitious material in high strength concrete also leads to a faster hydration heat release and an increase in concrete temperature. Experimental tests and research analyses were conducted on the pressure of the sidewall and the shrinkage strain of the concrete in the giant column during the pouring and curing process. Results show that the construction quality of the projects multi cavity polygonal steel pipe giant column steel pipe concrete meet the requirements.

Keywords:tall buildings;steel concrete composite structure;multi cavity;polygon;steel tube giant column;concrete;strain;test

* 中建股份科技研发计划(CSCEC-2020-Z-32

[作者简介]翁邦正,高级工程师,Email:344372214@qq.com

 

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