组合十字形钢管混凝土柱承压性能有限元分析及承载力计算

陈鹏; 孙舒

doi:10.13204/j.gyjzG21022307

组合十字形钢管混凝土柱承压性能有限元分析及承载力计算

doi: 10.13204/j.gyjzG21022307

陈鹏,
孙舒^,

泰州职业技术学院建筑工程学院, 江苏泰州 225300

基金项目:

江苏省自然科学基金项目(BK20150803)

江苏省博士后基金(101148B)。

详细信息

作者简介:
陈鹏,男,1972年出生,硕士,副教授,国家一级注册结构工程师,注册岩土工程师。

通讯作者:
孙舒,男,1983年出生,硕士,副教授,注册岩土工程师,116258624@qq.com。

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- 被引次数: 0
出版历程
- 收稿日期: 2021-02-23

Finite Element Analysis and Bearing Capacity Calculation of Combined Cruciform CFST Columns

CHEN Peng,
SUN Shu^,

Institute of Civil Engineering, Taizhou Polytechnic College, Taizhou 225300, China

摘要

摘要: 为研究组合十字形钢管混凝土柱承压性能(轴压、偏压)和承载力计算方法,以有限元软件ABAQUS分析为主要研究手段,结合已有的6个试件的实测数据,并以偏心距、长细比、截面含钢率、混凝土强度等级和钢材屈服强度为变化参数进行了26个试件的拓展分析,探讨了各影响参数对组合十字形钢管混凝土柱承压性能的影响,分别研究了组合十字形钢管混凝土柱轴心受压柱和偏心受压柱的极限承载力计算方法,并提出实用设计算式。研究结果表明:组合十字形钢管混凝土柱极限承载力随着偏心距和长细比的增加而降低,随着含钢率、混凝土强度和钢材屈服强度的提高而提高,其中偏心距和混凝土强度较小时承载力退化较快,承载力随含钢率的增加呈近线性增长,槽钢强度的提高更能提高试件的承载能力。基于约束混凝土理论提出的组合十字形钢管混凝土承压(轴压、偏压)极限承载力计算方法有较好的适用性。
- 组合十字形钢管混凝土 /
- 偏压 /
- 轴压 /
- 有限元 /
- 承载力计算
Abstract: In order to study the bearing performance (axial compression, eccentric compression) and bearing capacity calculation method of composite cross shaped concrete-filled steel tubular column, the expansion analysis of 26 specimens was carried out by using the finite element software ABAQUS, combined with the measured data of 6 specimens, and taking the eccentricity, slenderness ratio, section steel ratio, concrete strength grade and steel yield strength as changing parameters. The influence of various influencing parameters on the bearing capacity of composite cross shaped concrete-filled steel tubular columns was discussed. The calculation methods of ultimate bearing capacity of axial compression columns and eccentric compression columns of composite cross shaped concrete-filled steel tubular columns were studied respectively, and practical design formulas were put forward. The results showed that the ultimate bearing capacity of composite cross shaped concrete-filled steel tubular columns decreased with the increase of eccentricity and slenderness ratio, and cncreased with the increase of steel ratio, concrete strength and steel yield strength. When the eccentricity and concrete strength were small, the bearing capacity degenerated rapidly, the bearing capacity increased nearly linearly with the increase of steel content, and the improvement of channel steel strength could improve the bearing capacity of the specimen. The calculation method of ultimate bearing capacity of composite cross shaped concrete-filled steel tubular (axial pressure and eccentric pressure) based on confined concrete theory had good applicability.
- combined cruciform CFST column /
- eccentric compression /
- axial compression /
- finite element /
- bearing capacity calculation

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参考文献(5)

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