Objective This study designs a new layered prefabricated lattice column as a protective support structure, which presents unique advantages in preventing and controlling rockfall disasters. Two groups of nine specimens are designed and fabricated for impact testing to investigate the impact resistance and failure mechanisms of the proposed layered fabricated lattice column under low-velocity and high-mass impacts. The influence of impact mass, impact height, and impact position on the dynamic response of the structure is analyzed by comparing the test results. A linear relationship between residual deformation and impact energy is established through curve fitting, providing empirical support for engineering applications. Methods The dynamic response of a newly developed layered prefabricated lattice column under impact was systematically investigated through experimental testing. The test setup consisted of a track rod, a steel pipe fixed to a reaction wall, and an impact apparatus. A total of 9 specimens were examined under varying impact masses (60, 80, and 100 kg), impact heights (3, 4, and 5 m), and impact positions (near and far from the fixed end). The deformation characteristics and failure modes of the specimens were observed, and the impact time history curve, strain time history curve, and displacement time history curve were recorded using a high-speed camera, dynamic acquisition instrument, and quartz sensor. The influence of different test parameters on the failure mode, impact peak value, impact platform value, impact duration, strain peak value, plastic strain, maximum lateral displacement, and residual displacement was identified through comparative analysis of the experimental results. Finally, a linear relationship between the impact energy and the residual deformation in the range of 2 400 to 5 000 J was established through curve fitting. Results and discussions The primary residual deformation of the new layered prefabricated columns after impact was local denting. When the specimen failed, the web member bent, and the bolts at both ends of the web member underwent a shear failure. Under identical impact energy conditions, the impact position has a significant effect on the dynamic response. Specimens impacted farther from the fixed end exhibited lower resistance, greater damage severity, and a more dispersed impact plateau value. With the increase in impact mass or impact height, both the impact peak value and impact duration increase. The mass has a more significant effect on the duration of the impact, while the impact velocity has a greater influence on the peak value of the impact. The residual deformation of the specimen increases with a rise in the impact energy. Specimens impacted near the fixed end exhibit larger residual displacements (up to 5.27 mm), whereas impacts away from the fixed end result in greater lateral displacements (up to 6.21 mm), as more energy is dissipated through vibration. The relationship between residual deformation and impact energy was established, with a deviation of less than 6% as determined by further regression analysis. Conclusions When the impact energy reached 5 000 J, the bolts of the web members undergo shear failure due to insufficient shear strength. Impact point farther from the fixed end reduce impact resistance of structure. Impact mass mainly affects the impact duration, while impact velocity primarily affects the peak impact force. Impacted near the fixed end exhibit larger residual displacements, while impacted farther from the fixed end exhibit larger lateral displacements. The linear relationship between residual deformation and impact energy provides a quantifiable means to assess structural damage, with an error 6%, demonstrating practical applicability in engineering.
SchumacherI, StroblE.Economic development and losses due to natural disasters:The role of hazard exposure[J].Ecological Economics,2011,72:97‒105. doi:10.1016/j.ecolecon.2011.09.002
[2]
GaoLiang, ChangYide, ZhangJunfa.Experimental study on energy dissipation and buffering of rigid flexible laminated protective structure of pier under rockfall impact[J].Journal of Vibration Engineering,2023,36(4):1113‒1124.
SunKeqin, XuJie, TianYongding.Dynamic behavior investigation of reinforced concrete bridge under multi-hazard effect of rockfall impact and material corrosion[J].Structures,2023,58:105557. doi:10.1016/j.istruc.2023.105557
[5]
XuHu, GentiliniC, YuZhixiang,et al.An energy allocation based design approach for flexible rockfall protection barriers[J].Engineering Structures,2018,173:831‒852. doi:10.1016/j.engstruct.2018.07.018
[6]
GentiliniC, GottardiG, GovoniL,et al.Design of falling rock protection barriers using numerical models[J].Engineering Structures,2013,50:96‒106. doi:10.1016/j.engstruct.2012.07.008
[7]
WuHao, WuYifan, MaLiangliang.Design of passive flexible barrier against rockfall impact with 8 000 kJ energy level[J].Explosion and Shock Waves,2025,45(3):170‒190.
LinLi, HuangBo, XiaoXinke,et al.Behavior of dynamic material Q355B steel based on the Johnson‒Cook model[J].Journal of Vibration and Shock,2020,39(18):231‒237.
GilbertB P, RasmussenK J R.Determination of accidental forklift truck impact forces on drive-in steel rack structures[J].Engineering Structures,2011,33(5):1403‒1409. doi:10.1016/j.engstruct.2010.10.022
[16]
LiuYang, LinXinyu, ChenZhihua,et al.Experimental research and numerical simulation of a modular composite steel frame structure[J].Structures,2025,71:107914. doi:10.1016/j.istruc.2024.107914
[17]
NadeemG, SafieeN A, Abu BakarN,et al.Experimental and numerical study of self-locking adaptable inter connection for modular steel structures[J].Journal of Building Engineering,2023,65:105723. doi:10.1016/j.jobe.2022.105723
[18]
YinXiaoli, YanXiaoyan, ChenPengcheng,et al.Research on lateral impact resistance of steel lattice columns[J].China Sciencepaper,2024,19(3):292‒299.
CuiJuanling, GuoZhaosheng, WangRui,et al.Tests for behavior of a hot rolled H-shaped steel column under lateral impact[J].Journal of Vibration and Shock,2014,33(18):133‒139.
ZhangGuoping.Experimental study on the residual mechanical property of built-up battened steel columns after lateral impact[J].Structural Engineers,2022,38(1):127‒133.
WangXiuli, HuZhiming, CuiXiaoyan.Dynamic response analysis of steel grille dam under the impact of big stones in debris flow[J].The Chinese Journal of Geological Hazard and Control,2014,25(4):30‒36.
CuiKai, ZhangYongsheng, GuoZhaosheng.Finite element analysis on dynamic behavior of A latticed steel column under impacts[J].Science Technology and Engineering,2020,20(4):1551‒1557.
ZhaoLei, ZouDingfu, ZhangLijun,et al.Parametric study on the mechanical response of a flexible rockfall barrier[J].Journal of Vibration and Shock,2023,42(12):8‒17.
LiHuadong, ZuoMingyu, LiPu,et al.Dynamic response analysis of passive flexible protection system under impact of rockfalls[J].Journal of Southwest Jiaotong University,2020,55(6):1297‒1305.
ChenGuocan, LiuYongbin, YuZiqi,et al.Dynamic response of recycled aggregate concrete-filled steel tube columns under impact load[J].Structures,2025,73:108477. doi:10.1016/j.istruc.2025.108477
[33]
PrakashA, MonikaA P, AnandavalliN.Behaviour of Steel-Concrete Composite(SCC) girder under impact due to rock fall[J].Journal of Constructional Steel Research,2021,177:106474. doi:10.1016/j.jcsr.2020.106474
[34]
XiangSiyu, HeYongjun, ZhouXuhong,et al.Continuous twice-impact analysis of steel parking structure columns[J].Journal of Constructional Steel Research,2021,187:106989. doi:10.1016/j.jcsr.2021.106989
[35]
WangHaitao, HuoJingsi, LiuYanzhi,et al.Experimental and numerical study on impact behavior of beam‒column substructures of steel frame[J].Structures,2021,29:14‒29. doi:10.1016/j.istruc.2020.10.057
[36]
XueShuyou, HaoHong, HaoYifei.Numerical investigation of impact response of bridge pier subjected to off-center vehicle collision[J].Engineering Structures,2024,317:118624. doi:10.1016/j.engstruct.2024.118624
[37]
ZhangRenbo, HaoShaohua, JinLiu,et al.Scaling effect on impact responses of steel beams and its energy threshold[J].International Journal of Mechanical Sciences,2025,287:109996. doi:10.1016/j.ijmecsci.2025.109996
[38]
ChuYunpeng, XiaHui, ZhangHaichuan,et al.Dynamic response analysis of the new layered assembled lattice piers under lateral impact[J].Structures,2024,70:107801. doi:10.1016/j.istruc.2024.107801
[39]
ZhuXiang, KangMiao, FeiYifan,et al.Impact behavior of concrete-filled steel tube with cruciform reinforcing steel under lateral impact load[J].Engineering Structures,2021,247:113104. doi:10.1016/j.engstruct.2021.113104
[40]
ZhangHaichuan.Dynamic Response and protection of lattice pier under rockfall impact[D].Mianyang:Southwest University of Science and Technology,2024.
[41]
张海川.滚石冲击作用下格构式桥墩动态响应及防护研究[D].绵阳:西南科技大学,2024.
[42]
WangLuming, LiuYanhui, ZhaoShichun,et al.Study on evaluation model and influencing factors for cracking of concrete-filled steel tubular members subjected to lateral low-velocity impact[J].China Civil Engineering Journal,2022,55(3):7‒17.