钢管混凝土柱抗爆性能数值模拟与实验验证

赵均海; 孙珊珊; 党会学; 李新忠

doi:10.21656/1000-0887.400207

钢管混凝土柱抗爆性能数值模拟与实验验证

doi: 10.21656/1000-0887.400207

长安大学建筑工程学院, 西安 710061

基金项目: 国家自然科学基金（51878056）；陕西省科技计划(社会发展领域项目)（2019SF-256）；陕西省自然科学基金（2018JQ5119;2018JQ5023）

详细信息

作者简介:
赵均海（1960—），男，教授，博士（通讯作者. E-mail: zhaojh@chd.edu.cn）.

中图分类号: TU398.9
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- 文章访问数: 857
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- 被引次数: 0
出版历程
- 收稿日期: 2019-07-10
- 修回日期: 2019-12-12
- 刊出日期: 2020-09-01

Numerical Simulation and Test Validation for Concreted Filled Steel Tube Columns Under Blast Loading

School of Civil Engineering, Chang’an University, Xi’an 710061, P.R.China

Funds: The National Natural Science Foundation of China（51878056）

摘要

摘要: 利用LS-DYNA非线性有限元程序，基于多物质流固耦合方法，建立了爆炸荷载作用下钢管混凝土柱的动态响应数值模型.对比分析了模拟结果与足尺构件的爆炸破坏实验结果，验证了数值模型和计算方法的有效性，并运用参数化分析方法，研究了截面形式、比例距离、混凝土强度及钢材等级、截面形状特性等关键参数对钢管混凝土柱抗爆性能的影响.研究结果表明：钢管混凝土柱具有优越的抗爆性能，所建立的数值模型能够有效地分析钢管混凝土柱在爆炸荷载作用下的动态影响及破坏形态；圆形截面钢管混凝土柱的抗爆性能优于方形截面；提高材料等级、减小圆形截面钢管混凝土柱的径厚比、增大矩形截面钢管混凝土柱的长宽比，均有利于提升钢管混凝土柱的抗爆特性.
- 结构工程 /
- 钢管混凝土柱 /
- 爆炸荷载 /
- 动力响应
Abstract: Based on the LS-DYNA nonlinear finite element program and multi-material fluid-solid coupling method, the finite element model was developed to analyze dynamic responses and damage mechanisms of concreted filled steel tube (CFST) columns under blast loading, which were validated through comparison between simulated results and tested ones of the full-scale specimens. The effects of main parameters including the section form, the scale distance, the concrete strength, the steel strength and the section shape characteristics on the blast-resistant performance of the CFST columns were investigated with the finite element model. The results indicate that, the CFST columns have excellent anti-blast performances, and the proposed finite element model predicts the dynamic responses of the CFST columns under blast loading efficiently; the anti-blast performance of circular CFST columns is better than that of square ones; increasing the material strength and the length-width ratio of a rectangular CFST column can improve the blast-resistant performance, and decreasing the radius-thickness ratio of a circular CFST column also can promote that resistance.
- structural engineering /
- concrete-filled steel tube column /
- blast loading /
- dynamic response

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