[1]朱海清,周 展,陈玉启.基于仿真分析的钢管混凝土T形节点冲击破坏模式研究[J].武汉工程大学学报,2022,44(04):455-461.[doi:10.19843/j.cnki.CN42-1779/TQ.202112005]
　ZHU Haiqing,ZHOU Zhan,CHEN Yuqi.Failure Modes of Concrete-Filled Steel Tube T-Joints Under Impact Loading Based on Numerical Analysis[J].Journal of Wuhan Institute of Technology,2022,44(04):455-461.[doi:10.19843/j.cnki.CN42-1779/TQ.202112005]

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基于仿真分析的钢管混凝土T形节点冲击破坏模式研究(/HTML)

分享到：

《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:

44

期数:

2022年04期

页码:

455-461

栏目:

资源与土木工程

出版日期:

2022-08-31

文章信息/Info

Title:

Failure Modes of Concrete-Filled Steel Tube T-Joints Under Impact Loading Based on Numerical Analysis

文章编号:

1674 - 2869（2022）04 - 0455 - 07

作者:

朱海清; 周 展; 陈玉启

武汉工程大学土木工程与建筑学院，湖北 武汉 4300074

Author(s):

ZHU Haiqing; ZHOU Zhan; CHEN Yuqi

School of Civil Engineering and Architecture，Wuhan Institute of Technology，Wuhan 430074，China

关键词:

钢管混凝土; T形节点; 冲击荷载; 破坏模式; 有限元分析

Keywords:

concrete-filled steel tube;  T-joint; impact loading;  failure mode;  finite element analysis

分类号:

U375

DOI:

10.19843/j.cnki.CN42-1779/TQ.202112005

文献标志码:

A

摘要:

基于Abaqus/Explicit平台建立了考虑应变率效应、材料损伤特性、接触特性的精细化有限元仿真模型，研究钢管混凝土T形节点在支管受冲击作用下结构的破坏模式。首先，通过已有试验验证了仿真模型的准确性；然后，根据汽车撞击、轮船撞击和爆炸冲击3种工况对节点进行了冲击响应分析。研究表明：受冲击物质量和速度影响，钢管混凝土T形节点主要表现为支管局部屈曲破坏、主管局部屈曲破坏和主管整体弯曲破坏。构件的等效刚度随构件壁厚增大而增大，但其塑性变形能从壁厚2 mm增大到4 mm时增幅明显，由4 mm增大到6 mm时增幅较小。因此，应根据T形构件所处的冲击环境合理选择壁厚，以牺牲局部构件的变形换取主体结构的安全。

Abstract:

A finite model of concrete-filled steel tube T-joints was proposed through Abaqus/Explicit platform. The strain rate effect，damage properties and contact properties are considered to improve the accuracy of the model. Firstly，the accuracy of the model was verified by experiments. Then the dynamic behaviors of T-joints were studied under different impact loadings，including vehicle impact，ship impact and blast impact. Research results can be drawn as follows：the failure modes of T-joints are local buckling at brace，local buckling at chord，and bending damage at chord，which are influenced by the mass and velocity of the impact conditions. The equivalent stiffness of T-joint increases with the increasing of the wall thickness of tube. The plastic energy increases sharply when the wall thickness increases from 2 mm to 4 mm，but it increases lightly when the wall thickness increases from 4 mm to 6 mm. Since it is necessary to sacrifice local member to protect the whole structure，the optimal wall thickness of tube should be designed carefully.

备注/Memo

备注/Memo:

收稿日期：2021-12-07

基金项目：湖北省自然科学基金（2019CFB185）；湖北省教育厅科技项目（Q20191501）

作者简介：朱海清，博士，讲师。E-mail：[email protected]

引文格式：朱海清，周展，陈玉启. 基于仿真分析的钢管混凝土T形节点冲击破坏模式研究［J］. 武汉工程大学学报，2022，44（4）：455-461.

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