(1 浙大城市学院土木工程系, 杭州 310015; 2 浙江省建筑设计研究院, 杭州 310006;3 浙江大学空间结构研究中心, 杭州 310058)

摘要: 钢管混凝土斜柱体系内部浇灌混凝土的密实度质量是保证整体结构承载性能的重要因素. 以 X 形平面斜柱节点、K 形空间斜柱节点为例,建立钢管混凝土斜柱的足尺试验模型,通过超声 CT 技术检测其内部浇灌混凝土的密实度,以获得合理有效的浇灌工艺并应用于工程;进而针对斜柱网格体系的混凝土密实度检测布置进行了研究. 结果表明:试验模型钢板较厚时,采用 CT 成像检测可获得精确结果;试验模型浇灌工艺满足密实度要求时,实际施工应采用相同工艺以保证质量;对于混凝土密实度不足之处,可采用钻孔压浆法补强,而后补焊封回;钢管混凝土斜柱内部混凝土密实度检测布置包括斜柱构件检测数量、横截面检测位置两方面.

关键词: 钢管混凝土斜柱; 足尺模型试验; CT 成像检测; 混凝土密实度; 浇灌工艺; 检测布置方案

中图分类号:TU355,TU973 文献标志码:A 文章编号:1002-848X(2023)06-0124-07

DOI:10. 19701 / j. jzjg. 20201157

Experimental study on solid model and detection of the internal pouring concrete for the inclined column grid system

WANG Zhen1,2, YANG Xuelin2, ZHAO Yang1,3, WU Xiaoping2, QU Haochuan2

(1 Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China; 2 Zhejiang ProvinceInstitute of Architectural Design and Research, Hangzhou 310006, China; 3 Space Structures Research Center,Zhejiang University, Hangzhou 310058, China)

Abstract: The compactness quality of the internal pouring concrete for the concrete-filled steel tube inclined column systemis an important factor to ensure the bearing capacity of the whole structure. Taking X-type plane inclined column joint andK-type space inclined column joint as examples, a full-scale test model for the concrete-filled steel tube inclined columnwas established. Ultrasonic CT technology was used to detect the compactness of the internal pouring concrete, so as toobtain a reasonable and effective pouring technology and apply it to engineering. Furthermore, the detection arrangement ofthe concrete compactness for the inclined column grid system was studied. The results show that: when the steel plate of thetest model is relatively thick, the CT imaging detection can be used to obtain accurate results; when the pouring techniqueof the test model meets the requirement of compactness, the same technique should be adopted in the actual construction toensure the quality; for the position of insuffient concrete compactness, the drilling grouting method can be used to strength,and then repair welding sealing; the detection arrangement of the internal pouring concrete compactness for concrete-filledsteel tube inclined column includes two aspects: the detection quantity of the inclined column components and the detectionposition of the cross sections.

Keywords:concrete-filled steel tube inclined column; full-scale model test; CT imaging detection; concrete compactness;pouring technique; detection arragement scheme

∗浙江省基础公益研究计划项目( LGG22E080005),浙江省教育厅科研项目(Y202146072),浙江省水利厅重点科技项目(RB1909).

第一作者:王震,博士,副教授,主要从事超高层、大跨空间和复杂钢结构的设计和科研工作,Email:wzjggc@ 163. com.

[引用本文] 王震,杨学林,赵阳,等. 斜柱网格体系内部混凝土浇灌实体模型及检测试验研究[ J]. 建筑结构,2023,53(6):124-130. WANG Zhen,YANG Xuelin,ZHAO Yang,et al. Experimental study on solid model and detectionof the internal pouring concrete for the inclined column grid system[J]. Building Structure,2023,53(6):124-130.