Mechanical Behavior of Stirrup-enhanced Improved Welded Concrete Filled L-shaped Steel Tubular Stub Columns under Axial Compression

IF 1.9 4区工程技术 Q3 ENGINEERING, CIVIL

KSCE Journal of Civil Engineering Pub Date : 2024-09-12 DOI:10.1007/s12205-024-1571-9

En Wang, Fei Lyu, Faxing Ding, Jun Chen, Xuemei Liu

{"title":"Mechanical Behavior of Stirrup-enhanced Improved Welded Concrete Filled L-shaped Steel Tubular Stub Columns under Axial Compression","authors":"En Wang, Fei Lyu, Faxing Ding, Jun Chen, Xuemei Liu","doi":"10.1007/s12205-024-1571-9","DOIUrl":null,"url":null,"abstract":"<p>In this paper, we conducted the axial compression test on one improved welded concrete filled L-shaped steel tube (IWCFLST) stub column and two stirrup-enhanced IWCFLST stub columns. The experimental results indicate that the stirrup-enhanced IWCFLST stub columns exhibit better compressive mechanical properties. The stirrups can increase the axial compressive load-bearing capacity by up to 35% and the ductility coefficients by 77%. The impact of the equivalent stirrup ratio on the axial compression mechanical behavior was investigated. Three-dimensional (3D) solid finite element (FE) model of the specimens was constructed by ABAQUS. Parametric analysis was performed and the restriction action of IWCFLST stub column under axial compression was studied. The numerical study revealed the working mechanism of stirrups, steel tubes on concrete, while direct confinement of concrete elevates its axial stress level. Considering the shape and the stirrups, the axial compression ultimate load-bearing capacity design method of the IWCFLST stub column was proposed, providing data support for the promotion and application of special-shaped CFST columns.</p>","PeriodicalId":17897,"journal":{"name":"KSCE Journal of Civil Engineering","volume":"45 1","pages":""},"PeriodicalIF":1.9000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"KSCE Journal of Civil Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s12205-024-1571-9","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

In this paper, we conducted the axial compression test on one improved welded concrete filled L-shaped steel tube (IWCFLST) stub column and two stirrup-enhanced IWCFLST stub columns. The experimental results indicate that the stirrup-enhanced IWCFLST stub columns exhibit better compressive mechanical properties. The stirrups can increase the axial compressive load-bearing capacity by up to 35% and the ductility coefficients by 77%. The impact of the equivalent stirrup ratio on the axial compression mechanical behavior was investigated. Three-dimensional (3D) solid finite element (FE) model of the specimens was constructed by ABAQUS. Parametric analysis was performed and the restriction action of IWCFLST stub column under axial compression was studied. The numerical study revealed the working mechanism of stirrups, steel tubes on concrete, while direct confinement of concrete elevates its axial stress level. Considering the shape and the stirrups, the axial compression ultimate load-bearing capacity design method of the IWCFLST stub column was proposed, providing data support for the promotion and application of special-shaped CFST columns.

查看原文本刊更多论文

轴向压缩条件下箍筋增强改良焊接混凝土填充 L 型钢管支柱的力学行为

本文对一根改进型焊接混凝土填充 L 形钢管（IWCFLST）桩柱和两根箍筋增强型 IWCFLST 桩柱进行了轴向压缩试验。实验结果表明，箍筋增强型 IWCFLST 存根柱具有更好的抗压机械性能。箍筋可将轴向抗压承载力提高 35%，延性系数提高 77%。研究了等效箍筋比对轴向压缩力学性能的影响。试样的三维实体有限元（FE）模型由 ABAQUS 建立。进行了参数分析，并研究了 IWCFLST 存根柱在轴向压缩下的限制作用。数值研究揭示了箍筋和钢管对混凝土的作用机理，而对混凝土的直接约束则提高了其轴向应力水平。在考虑形状和箍筋的情况下，提出了 IWCFLST 短柱的轴压极限承载力设计方法，为异形 CFST 柱的推广应用提供了数据支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

KSCE Journal of Civil Engineering ENGINEERING, CIVIL-

CiteScore

4.00

自引率

9.10%

发文量

329

审稿时长

4.8 months

期刊介绍： The KSCE Journal of Civil Engineering is a technical bimonthly journal of the Korean Society of Civil Engineers. The journal reports original study results (both academic and practical) on past practices and present information in all civil engineering fields. The journal publishes original papers within the broad field of civil engineering, which includes, but are not limited to, the following: coastal and harbor engineering, construction management, environmental engineering, geotechnical engineering, highway engineering, hydraulic engineering, information technology, nuclear power engineering, railroad engineering, structural engineering, surveying and geo-spatial engineering, transportation engineering, tunnel engineering, and water resources and hydrologic engineering