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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

39卷

期数:

2022年05期

页码:

53-62

栏目:

结构工程

出版日期:

2022-09-30

文章信息/Info

Title:

Numerical Analysis of Axial Compression Behavior of Partially-encased Lightweight Aggregate Concrete Composite Stub Columns

文章编号:

1673-2049(2022)05-0053-10

作者:

张慧洁¹,胡 晨¹,王静峰^2,3,钱正昊²,刘 用^2,3

(1. 国网安徽省电力有限公司经济技术研究院,安徽 合肥 230061; 2. 合肥工业大学 土木与水利工程学院,安徽 合肥 230009; 3. 合肥工业大学 先进钢结构技术与产业化安徽省协同创新中心,安徽 合肥 230009)

Author(s):

ZHANG Hui-jie¹, HU Chen¹, WANG Jing-feng^2,3, QIAN Zheng-hao², LIU Yong^2,3

(1. Economic Technical Research Institute, State Grid Anhui Electric Power Co., Ltd.,Hefei 230061, Anhui, China; 2. College of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui, China; 3. Advanced Steel Structure Technology and Industrialization Collaborative Innovation Center of Anhui, Hefei University of Technology, Hefei 230009, Anhui, China)

关键词:

部分包覆钢-混凝土组合柱;  轻骨料混凝土;  轴压性能;  数值分析;  承载力

Keywords:

partially-encased concrete composite column;  lightweight aggregate concrete;  axial compression behavior;  numerical analysis;  bearing capacity

分类号:

TU375.3

DOI:

10.19815/j.jace.2021.08085

文献标志码:

A

摘要:

为研究部分包覆钢-轻骨料混凝土组合(PELC)短柱的轴压性能,采用ABAQUS软件建立了轴压作用下部分包裹钢-轻骨料混凝土组合短柱的有限元模型。通过典型构件揭示了部分包覆钢-轻骨料混凝土组合短柱在轴压荷载作用下的全过程受力机理与破坏模式; 分析了轻骨料混凝土强度、系杆间距、含钢率以及翼缘宽厚比等参数对部分包覆钢-轻骨料混凝土组合短柱轴压性能的影响规律; 基于规范AISC 360并考虑轻骨料混凝土约束效应,提出了一种部分包覆钢-轻骨料混凝土组合短柱轴压承载力的计算公式。结果表明:部分包覆钢-轻骨料混凝土组合短柱在轴压荷载作用下的主要破坏模式为轻骨料混凝土压溃、H型钢正弦半波状鼓曲以及系杆屈服; 部分包覆钢-轻骨料混凝土组合短柱的极限承载力将随着轻骨料混凝土强度与含钢率的增加而提高,延性将随着含钢率的增加而提高,随着系杆间距和轻骨料混凝土强度的增加而降低; 研究结果将为轻骨料混凝土组合柱在实际工程中的设计与应用提供理论依据。

Abstract:

In order to investigate the axial compression behavior of partially-encased lightweight aggregate concrete composite(PELC)stub columns, the finite element analysis model of PELC stub column under axial compression load was established by the software ABAQUS. Through the analysis of typical members, the whole process stress mechanism and failure mode of PELC stub columns under axial compression were revealed. The effects of parameters such as lightweight concrete strength, tie bar spacing, steel ratio and flange width-thickness ratio on the axial compression behavior of PELC stub columns were analyzed. Based on AISC 360 and considering the restraint effect of lightweight aggregate concrete, a calculation method of axial compressive capacity of PELC stub column was proposed. The results show that the main failure modes of PELC stub column under axial compression are lightweight aggregate concrete crushing, H-shaped steel sinusoidal half wave bulging and tie bar yielding. The ultimate bearing capacity of PELC stub columns increase with the rise of the lightweight aggregate concrete strength and steel ratio, and the ductility increase with the improvement of steel ratio, and decrease with the rise of tie bar spacing and lightweight aggregate concrete strength. The research results will provide a theoretical basis for the design and application of lightweight aggregate concrete composite columns in practical engineering.

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相似文献/References:

[1]肖海兵,赵均海,孙珊珊,等.方形薄壁钢管轻骨料混凝土短柱的承载力[J].建筑科学与工程学报,2010,27(02):83.
　XIAO Hai-bing,ZHAO Jun-hai,SUN Shan-shan,et al.Bearing Capacity of Short Column of Lightweight Aggregate Concrete-filled Square Thin-walled Steel Tube[J].Journal of Architecture and Civil Engineering,2010,27(05):83.

备注/Memo

备注/Memo:

收稿日期:2021-08-21
基金项目:教育部新世纪优秀人才支持计划资助项目(NCET-12-0838); 安徽高校协同创新项目(GXXT-2019-005); 安徽省自然科学基金项目(2108085QW248); 国家电网科研资助项目(W2020JSKF0559)
作者简介:张慧洁(1992-),女,安徽合肥人,工程师,工学硕士,E-mail:844697045@qq.com。
通信作者:王静峰(1976-),男,安徽合肥人,教授,博士研究生导师,工学博士,E-mail:jfwang008@163.com。

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更新日期/Last Update: 2022-09-30