Vol. 21, No. 6, pp. 511-519 (2025)
DYNAMIC RESPONSES OF HIGH-STRENGTH CONCRETE-FILLED
HIGH-STRENGTH SQUARE STEEL TUBULAR COLUMNS
UNDER VEHICLE COLLISION
Guo-Chang Li, Run-Ze Liu *, Xiao Li, Jia-Long Wang and Yue Zhou
School of Civil Engineering, Shenyang Jianzhu University, Shenyang, Liaoning 110168, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 10 May 2025; Revised: 11 June 2025; Accepted: 12 June 2025
DOI:10.18057/IJASC.2025.21.6.4
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ABSTRACT
High-strength concrete-filled high-strength square steel tubular (HCFHST) columns are vital structural elements in modern constructions, such as high-rise and large-span structures, due to their superior strength and reliability. However, during their services, they face challenges from vehicle collisions, which can compromise structural safety. To better understand their dynamic behaviours under vehicle collisions, dynamic constitutive relations for high-strength materials at high strain rates have been verified, firstly. Then, based on the verified simulation model, the working mechanisms of HSCFST columns under truck collision, including internal force development, damage evolution, and energy-dissipation mechanisms, are revealed. Furthermore, the influence of sectional dimensions, steel tube thickness, column height, axial compression ratio, material strengths, vehicle weight, and collision velocity on the anti-collision performance of HSCFST columns is presented. Simulation results indicate that HCFHST columns experience flexural deformation during collisions, and the cargo impact stage is the primary stage for plastic deformation development. The greatest bending moment occurs at the bottom, while the greatest shear force appears at the impact height. As deformation progresses, the steel tube becomes a critical internal force bearing component. The collision velocity, vehicle weight, sectional dimensions, steel tube thickness and steel strength are key factors affecting the anti-collision performance and energy-dissipating capacity of the HCFHST columns. By selecting key parameters according to the parametric study results, the maximum displacement calculation formula for HCFHST columns using the equivalent single degree of freedom method has been established, laying a foundation for the anti-collision design of HCFHST columns.
KEYWORDS
Concrete-Filled Steel Tubular Columns, High-Strength Materials, Dynamic Constitutive Relations of Materials, Vehicle Collisions, Dynamic Responses
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