Impact behavior of high-strength steel beam with circular web openings

• Published in: Journal of constructional steel research Vol. 211; p. 108159
• Main Authors: Chen, Huayan, Wang, Yanzhang, Fu, Chaojiang, Zhang, Ting, Luo, Caisong, Wang, Bizhen
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2023
• Subjects: Damage assessment; Dynamic response; Energy absorption; High-strength steel; Steel beams with circular web openings; Dynamic response; Steel beams with circular web openings; Damage assessment; Energy absorption; High-strength steel
• ISSN: 0143-974X; 1873-5983
• DOI: 10.1016/j.jcsr.2023.108159

A drop-weight impact testing machine was used to conduct an impact test on 9 specimens in order to examine the impact resistance of high-strength steel beams with circular web openings (HSSBCWO). The experimental results indicated that the dynamic response of HSSBCWO is significantly affected by the change of impact energy and opening height. A coefficient β is proposed to assess the severity of localized deformation in HSSBCWO, and the range of β values for the specimens of test are found to be approximately between 0.5 and 0.8. Within the range of impact energy designed for the experiment, HSSBCWO primarily absorbed energy through localized plastic deformation. A finite element model which can predict the dynamic response of HSSBCWO under impact load is established. The results show that the optimal ratios of opening height to beam height and spacing between openings to beam height for the HSSBCWO are determined to be 0.50 and 0.93, respectively. Furthermore, a damage evaluation system for HSSBCWO under impact load was established, utilizing the ratio of mid-span residual displacement to calculated beam span Dr / L0 as the damage assessment index, with impact energy, opening height, and spacing between opening as the main control parameters. •This study conducted impact test to investigate the dynamic response of High-strength steel beams with circular web openings (HSSBCWOs) under impact load.•Collect the impact force, displacement, and high-speed image during impact.•The use of high strength steel can make the steel beam with circular web opening (SBCWO) obtain good impact resistance.•A coefficient β is proposed to assess the severity of localized deformation in HSSBCWO.•HSSBCWO has a good absorption effect on impact energy.•A damage assessment system applicable to HSSBCWO was established.