Tests and finite element analysis for dynamic response of hollow box concrete-encased CFST columns under lateral impact

被引：0
|
作者：
Jia Z. [1 ]
Wang R. [1 ]
机构：
[1] College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 09期
关键词：
Concrete-encased CFST columns; Dynamic response; Finite element analysis; Hollow box-section; Impact performance;
D O I：
10.13465/j.cnki.jvs.2019.09.022
中图分类号：
学科分类号：
摘要：
A hollow box concrete-encased CFST (concrete-filled steel tube) column consists of reinforced concrete and concrete-filled steel tube. Here, to study its anti-impact performance, a drop hammer test machine was used to conduct the column's anti-impact tests and study effects of boundary conditions, impact height and axial compression ratio on impact force's time history and mid-span displacement. In addition, based on tests, a finite element model was established with the software ANSYS/LS-DYNA to analyze inner energy distribution of its components. The test results showed that with increase in impact height, impact force's time history curve is developed from two stages to three stages, and the action of inner buried CFST is gradually obvious; with the variation of boundary conditions, the anti-deformation capacity of the column with fixed ends is stronger than that of it with simply supported ends; the axial compression ratio has little influence on dynamic responses of the column; when impact energy is larger, the energy absorbed by CFST reaches 1/3, its anti-impact ability is obvious. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：166 / 172
页数：6
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