Dynamic Compression-Bending Performance of Concrete-Filled Steel Tubular Columns under Lateral Impact

Author:

Xu Man1,Ding Zhichao1,Hao Xianjuan2,Gao Shan3ORCID

Affiliation:

1. School of Civil Engineering and Transportation, Northeast Forestry University, Harbin 150040, China

2. Design and Development Department, Center International Group Co., Ltd., Beijing 100176, China

3. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China

Abstract

In this paper, a finite element model of concrete-filled steel tubular (CFST) columns under compression and lateral impact is developed and validated against previous experiments. After analyzing the influence of axial compression on the impact performance of CFST columns, the effects of eccentricity, material strength, and steel ratio on the dynamic compression-bending performances of CFST columns subjected to lateral impact are discussed. The simulated results show that at different axial compression ratios, CFST columns show overall bending failure under lateral impact. The axial force ratio below 0.2 shows a positive effect on the impact resistance of CFST columns, otherwise the axial force would degrade the impact resistance of CFST columns. Eccentricity has a negative effect on the dynamic compression-bending performance of CFST columns. The increase in the concrete strength has little effect on the dynamic compression-bending performance of the CFST columns under lateral impact and eccentric compression. The increases in steel strength and steel ratio can improve the dynamic compression-bending performances of the CFST columns under lateral impact and eccentric compression. Even though the prediction formula for the dynamic compression-bending performance of CFST columns shows good fitness with the simulated results, it is modified to have sufficient strength reserves for design applications.

Funder

National Natural Science Foundation of China

Fundamental Research Funds for the Central Universities

Youth Innovation Team of Shaanxi Universities

Publisher

MDPI AG

Subject

Building and Construction,Civil and Structural Engineering,Architecture

Reference26 articles.

1. Han, L.H. (2017). Theory and Practice of Concrete-Filled Steel Tubular Structures, Science Press.

2. Zhang, C. (2005). Dynamic Analysis of Concrete-Filled Steel Tubular Columns under Impact Load, Taiyuan University of Technology.

3. Discussion on dynamic characteristics of axial impact of concrete-filled steel tubular short columns;Li;J. Taiyuan Univ. Technol.,2006

4. Zheng, Q. (2008). Experimental Study and Finite Element Analysis on Impact Resistance of Concrete-Filled Steel Tubular Short Columns, Hunan University.

5. Size-dependency of concrete-filled steel tubes subject to impact loading;Mirmomeni;Int. J. Impact Eng.,2017

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