[1]陈庆胜,庞亚红,孔 龙,等.高强锥形中空夹层薄壁钢管混凝土轴压短柱试验研究[J].西安建筑科技大学学报(自然科学版),2022,(02):306-316.[doi:10.15986/j.1006-7930.2022.02.019]
 CHEN Qingsheng,PANG Yahong,KONG Long,et al.Experimental study on high strength tapered thin walled concrete-filled double skin steel tubular stub columns under axial compression[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2022,(02):306-316.[doi:10.15986/j.1006-7930.2022.02.019]
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高强锥形中空夹层薄壁钢管混凝土轴压短柱试验研究()
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西安建筑科技大学学报(自然科学版)[ISSN:1006-7930/CN:61-1295/TU]

卷:
期数:
2022年02期
页码:
306-316
栏目:
出版日期:
2022-04-28

文章信息/Info

Title:
Experimental study on high strength tapered thin walled concrete-filled double skin steel tubular stub columns under axial compression
文章编号:
1006-7930(2022)02-0306-11
作者:
陈庆胜1庞亚红2孔 龙1李博凡2安 宁3王先铁2
(1.国网甘肃省经济技术研究院,甘肃 兰州 730000; 2.西安建筑科技大学 土木工程学院,陕西 西安 710055; 3.国网甘肃省电力公司,甘肃 兰州 730000)
Author(s):
CHEN Qingsheng1 PANG Yahong2 KONG Long1 LI Bofan2 AN Ning3 WANG Xiantie2
(1.State Grid Gansu Economic Research Institute, Lanzhou, China; 2.School of Civil Engineering,Xi’an Univ. of Arch. & Tech.,Xi’an 710055,China; 3.State Grid Gansu Electric Power Co., Lanzhou 730000, China)
关键词:
锥形 中空夹层薄壁钢管混凝土 轴压短柱 试验研究 名义约束效应系数 承载力计算公式
Keywords:
tapered thin walled concrete-filled double skin steel tube stub columns under axial compression experimental research nominal confinement factor calculation formula of bearing capacity
分类号:
TU398+.9
DOI:
10.15986/j.1006-7930.2022.02.019
文献标志码:
A
摘要:
对5组共10个采用Q690钢材和C120混凝土的高强锥形中空夹层薄壁钢管混凝土(THSTW-CFDS)轴压短柱进行试验研究,试验参数为内、外钢管径厚比、空心率以及是否配置纵向加劲肋.结果表明:随着空心率和内、外钢管径厚比增加,试件极限承载力降低; 带肋试件和无肋试件相比,空心率为0.72时,极限承载力提高约7.2%; 空心率为0.82时,极限承载力提高约7.5%; 空心率为0.85时,极限承载力提高约10.9%.利用有限元软件ABAQUS对THSTW-CFDST轴压短柱进行数值模拟,并对其进行轴心受压全过程分析.THSTW-CFDS轴压短柱的受力全过程包括弹性阶段、弹塑性阶段和塑性下降阶段.提出了适用于带纵向加劲肋THSTW-CDFS轴压短柱的承载力计算公式,公式计算结果与试验结果吻合较好.
Abstract:
A total of 10 high strength tapered thin walled concrete-filled double skin steel tubular(THSTW-CFDST)stub columns under axial compression with Q690 steel and C120 concrete were tested in five groups, and the test parameters were the diameter-to-thickness ratio of internal and external steel pipes, the hollow ratio and longitudinal stiffeners. The results showed that with the increase of the hollow ratio and the diameter-to-thickness ratio of the inner and outer steel pipes, the ultimate load bearing capacity of the specimen decreased. Compared with the ribbed specimens, when the hollow ratio was 0.72, the ultimate load bearing capacity of the specimens without ribs increased by about 7.2%, when the hollow ratio was 0.82, the ultimate load bearing capacity increased by about 7.5%, and when the hollow ratio was 0.85, the ultimate load bearing capacity increased by about 10.9%. The finite element software ABAQUS was used to numerically simulate THSTW-CFDST stub columns under axial compression, and the whole process of axial compression was analyzed. The results showed that the whole process of this component under axial compression included the elastic stage, the elasto-plastic stage and the plastic descending stage. Finally, the formula for calculating the axial bearing capacity of the longitudinal stiffeners reinforced THSTW-CFDST stub columns member was proposed, and the calculation results of the formula were in good agreement with the test results.

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备注/Memo

备注/Memo:
收稿日期:2021-09-23修改稿日期:2021-04-22
基金项目:国家自然科学基金资助项目(51678474)
第一作者:陈庆胜(1971—),男,学士,高级工程师,主要从事输电线路设计与研究.E-mail:544149121@qq.com 通信作者:王先铁(1979—),男,博士,教授,主要从事钢结构与钢管混凝土结构研究.E-mail:wangxiantie@163.com
更新日期/Last Update: 2022-04-28