Lateral Impact Performance of Cold-Formed Steel L-Shaped Built-Up Columns
Mengyao Li, Jinshan Sun, Yi Hu, Liqiang Jiang, Shizhong Zhou, Guangwei Dai, Ning Wu
TL;DR
This study examines how cold-formed steel L-shaped columns resist lateral impacts, identifying key factors that influence their performance.
Contribution
The paper introduces a validated finite element model and parametric analysis to optimize the impact resistance of cold-formed steel columns.
Findings
Peak lateral impact force increases nonlinearly with axial compression ratio, with an optimal ratio of about 0.3.
Higher impact velocity significantly increases both peak force and displacement responses of the specimens.
Increasing cross-sectional dimensions and steel thickness, and reducing screw spacing, enhances impact resistance.
Abstract
Blasts, vehicle collisions, and other unexpected incidents may cause lateral impacts on building structures, which threaten their safety. This paper investigates the impact resistance of cold-formed steel (CFS) L-shaped built-up columns (LBC). Firstly, a finite element model (FEM) was established and validated through experiments conducted by the authors. Then, a parametric analysis was conducted to quantify the effects of axial compression ratio, impact velocity, and dimensions on the impact response. The results indicated that: (1) The peak lateral impact force of the specimens presented a significant nonlinear trend with increasing axial compression ratio, and an optimal axial compression ratio was found as about 0.3. (2) Higher impact velocity intensified both force and displacement responses of the specimens, and both lateral impact peak force and maximum displacement increased…
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Taxonomy
TopicsStructural Load-Bearing Analysis · Structural Behavior of Reinforced Concrete · Structural Response to Dynamic Loads