Performance of (1) concrete-filled double-skin steel tube with and without core concrete, and (2) concrete-filled steel tubular axially loaded composite columns under close-in blast

IF 2.1 Q2 ENGINEERING, CIVIL International Journal of Protective Structures Pub Date : 2023-09-01 DOI:10.1177/20414196221104143
S. Anas, Meraj Alam, M. Umair
{"title":"Performance of (1) concrete-filled double-skin steel tube with and without core concrete, and (2) concrete-filled steel tubular axially loaded composite columns under close-in blast","authors":"S. Anas, Meraj Alam, M. Umair","doi":"10.1177/20414196221104143","DOIUrl":null,"url":null,"abstract":"Composite structural members such as concrete-filled double-skin steel tube (CFDSST) and concrete-filled double steel tubular (CFDST) columns are increasingly being utilized in modern structures owing to their capability to integrate the beneficial properties of constituent materials to carry heavy loads as compared to conventional reinforced concrete columns. Axial compression performance of such composite columns has been extensively investigated and available in the open literature. However, their response under impulsive loadings such as those induced by explosions is not very well studied because not many investigations have been conducted on these columns. Performance of composite compression members under short-duration/high-magnitude blast loading is of considerable interest under the prevailing environment of hi-tech wars, subversive activities, and accidental explosions. The recent devastating accidental Ammonium Nitrate explosion at Beirut port (Lebanon), and the ongoing invasion of Ukraine by Russia raise the concern of researchers and engineers for the safety of structural elements/components. In this study, a 3-D finite element model of axially loaded 2500 mm long CFDSST column of ultra-high-strength concrete (170 MPa) is developed in ABAQUS/Explicit-v.6.15 computer code equipped with Concrete Damage Plasticity (CDP) model, and investigation has been carried out for its blast performance under the 50kg-TNT explosive load at a standoff distance of 1.50 m in free-air. The effects of strain rate on the compressive strength of the concrete are considered as per fib Model Code 2010 (R2010) and UFC-3-340-02 (2008). The non-linear behavior of the steel is also taken into account. Damages in the form of (1) a - concrete crushing on the explosion side of the column and b - concrete cracking on the tension side and their spread over the column length, and (2) yielding of tubes are observed. Computational results are validated with the available experimental observations. To improve the column response, the analysis has been extended to investigate the blast performance of axially loaded CFDSST columns with and without core concrete having an inner steel tube of circular/square cross-section and their response have been compared with the equivalent single skin concrete-filled steel tubular circular/square columns of same axial load capacity.","PeriodicalId":46272,"journal":{"name":"International Journal of Protective Structures","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"15","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Protective Structures","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1177/20414196221104143","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 15

Abstract

Composite structural members such as concrete-filled double-skin steel tube (CFDSST) and concrete-filled double steel tubular (CFDST) columns are increasingly being utilized in modern structures owing to their capability to integrate the beneficial properties of constituent materials to carry heavy loads as compared to conventional reinforced concrete columns. Axial compression performance of such composite columns has been extensively investigated and available in the open literature. However, their response under impulsive loadings such as those induced by explosions is not very well studied because not many investigations have been conducted on these columns. Performance of composite compression members under short-duration/high-magnitude blast loading is of considerable interest under the prevailing environment of hi-tech wars, subversive activities, and accidental explosions. The recent devastating accidental Ammonium Nitrate explosion at Beirut port (Lebanon), and the ongoing invasion of Ukraine by Russia raise the concern of researchers and engineers for the safety of structural elements/components. In this study, a 3-D finite element model of axially loaded 2500 mm long CFDSST column of ultra-high-strength concrete (170 MPa) is developed in ABAQUS/Explicit-v.6.15 computer code equipped with Concrete Damage Plasticity (CDP) model, and investigation has been carried out for its blast performance under the 50kg-TNT explosive load at a standoff distance of 1.50 m in free-air. The effects of strain rate on the compressive strength of the concrete are considered as per fib Model Code 2010 (R2010) and UFC-3-340-02 (2008). The non-linear behavior of the steel is also taken into account. Damages in the form of (1) a - concrete crushing on the explosion side of the column and b - concrete cracking on the tension side and their spread over the column length, and (2) yielding of tubes are observed. Computational results are validated with the available experimental observations. To improve the column response, the analysis has been extended to investigate the blast performance of axially loaded CFDSST columns with and without core concrete having an inner steel tube of circular/square cross-section and their response have been compared with the equivalent single skin concrete-filled steel tubular circular/square columns of same axial load capacity.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
(1)带和不带核心混凝土的双皮钢管混凝土和(2)近距离爆破作用下钢管混凝土轴向荷载组合柱的性能
与传统的钢筋混凝土柱相比,双皮钢管混凝土(CFDSST)和双钢管混凝土(CFDST)柱等复合结构构件能够整合组成材料的有益特性,从而承受较大的荷载,因此在现代结构中越来越多地使用。这种复合柱的轴向压缩性能已被广泛研究,并在开放文献中可用。然而,由于对这些柱进行的调查不多,因此对它们在脉冲载荷(如爆炸引起的脉冲载荷)下的响应研究得不是很好。在高技术战争、颠覆活动和意外爆炸的环境下,复合材料压缩构件在短持续时间/高震级爆炸载荷下的性能具有重要意义。最近在贝鲁特港(黎巴嫩)发生的毁灭性的意外硝酸铵爆炸,以及俄罗斯对乌克兰的持续入侵,引起了研究人员和工程师对结构元件/部件安全的关注。本研究在ABAQUS/Explicit-v.6.15计算机代码中建立了轴向加载2500mm长(170mpa)超高强度混凝土CFDSST柱的三维有限元模型,并配以混凝土损伤塑性(concrete Damage Plasticity, CDP)模型,研究了其在自由空气中50kg-TNT炸药荷载作用下1.50 m距离处的爆炸性能。应变率对混凝土抗压强度的影响按fib模型规范2010 (R2010)和UFC-3-340-02(2008)考虑。钢的非线性行为也被考虑在内。观察到柱的破坏形式为(1)a -爆炸侧混凝土破碎,b -受拉侧混凝土开裂并沿柱长扩散,(2)筒体屈服。计算结果与现有的实验观测结果相吻合。为了改善柱的响应,扩展了分析,研究了轴向载荷下带和不带核心混凝土的圆形/方形截面内钢管CFDSST柱的爆炸性能,并将其响应与具有相同轴向载荷能力的等效单层钢管混凝土圆形/方形柱进行了比较。
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 去求助
来源期刊
CiteScore
4.30
自引率
25.00%
发文量
48
期刊最新文献
Investigating the significance of non-ideal effects in large-scale blast propagation A high explosive blast simulator Pounding response of concrete rods with rough impacting surfaces Airblast observations and near-field modeling of the large surface explosion coupling experiment Development of a fast-running method for prediction of blast propagation in partially confined spaces
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1