防灾减灾工程学报2025，Vol.45Issue(5)：1110-1117,8.DOI:10.13409/j.cnki.jdpme.20250225002
钢木混合柱在多次冲击下H型钢柱冲击力计算与修正
Calculation and Correction of Impact Force on H-shaped Steel Columns in Steel-wood Composite Columns under Multiple Impacts
摘要
Abstract
Considering the characteristics of residential buildings in western China,a hybrid joint with"wood on top and steel at the bottom"was proposed,with the drop hammer impact force serving as an important basis for structural design.Based on the principle of energy conservation and using the im-pact vertical displacement as a variable,a calculation method for the drop hammer impact force under multiple impacts with different energy levels was proposed.The dynamic response of the hybrid joint under impact loading was studied through the test,with emphasis on the effects of impact velocity and drop hammer mass on the impact force,impact vertical displacement,and correction coefficient.A di-mensionless empirical formula for correction coefficient was developed,and a calculation model for drop hammer impact force was established,and its reliability was verified.The results showed that the sleeve thickness had little influence on the impact vertical displacement.The impact velocity and drop hammer mass had significant effects on both the impact force and vertical displacement.The correction coefficient was positively correlated with impact velocity and negatively correlated with drop hammer mass.The proposed calculation model for drop hammer impact force could effectively predict the peak value of drop hammer impact force,and the results showed good agreement with the calculation mod-els based on Hertz elastic theory and Thornton elastic-plastic theory.The findings can provide a theo-retical basis for the protection of structures under drop hammer impacts.关键词
接触理论/落锤冲击力/修正系数/能量守恒/弹塑性/钢木组合节点Key words
contact theory/drop hammer impact force/correction coefficient/energy conservation/elasto-plasticity/steel-wood composite joint分类
建筑与水利引用本文复制引用
吴长,樊迎妮,马东东,方仁俊..钢木混合柱在多次冲击下H型钢柱冲击力计算与修正[J].防灾减灾工程学报,2025,45(5):1110-1117,8.基金项目
国家自然科学基金项目(52268029)、工程材料与结构冲击与振动四川省重点实验室开放基金(20kfgk03)资助 （52268029）
