Calculation and Correction of Impact Force on H‑shaped Steel Columns in Steel‑wood Composite Columns under Multiple Impacts

WU Chang; FAN Yingni; MA Dongdong; FANG Renjun

doi:10.13409/j.cnki.jdpme.20250225002

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Calculation and Correction of Impact Force on H‑shaped Steel Columns in Steel‑wood Composite Columns under Multiple Impacts

更新时间：2025-12-12

- Calculation and Correction of Impact Force on H‑shaped Steel Columns in Steel‑wood Composite Columns under Multiple Impacts
- Journal of Disaster Prevention and Mitigation Engineering Vol. 45, Issue 5, Pages: 1110-1117(2025)
- 作者机构：
  
  1.兰州理工大学土木工程学院，甘肃兰州 730050
  2.甘肃省土木工程防灾减灾重点实验室，甘肃兰州 730050
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.20250225002
  CLC： TU398.9
- Received：25 February 2025，
  
  Revised：2025-05-06，
  
  Published：28 October 2025
- 稿件说明：
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吴长,樊迎妮,马东东等.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(05):1110-1117.

WU Chang,FAN Yingni,MA Dongdong,et al.Calculation and Correction of Impact Force on H‑shaped Steel Columns in Steel‑wood Composite Columns under Multiple Impacts[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(05):1110-1117.
吴长,樊迎妮,马东东等.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(05):1110-1117. DOI： 10.13409/j.cnki.jdpme.20250225002.

WU Chang,FAN Yingni,MA Dongdong,et al.Calculation and Correction of Impact Force on H‑shaped Steel Columns in Steel‑wood Composite Columns under Multiple Impacts[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(05):1110-1117. DOI： 10.13409/j.cnki.jdpme.20250225002.

摘要

综合考虑西部地区民居的特点，提出了一种“上木下钢”的混合节点，而落锤冲击力是结构设计的重要依据。基于能量守恒原理，以冲击竖向位移为变量，提出多次冲击下不同能量冲击的落锤冲击力计算方法。通过试验研究了混合节点在冲击作用下的动力响应，并探究冲击速度及落锤质量对冲击力、冲击竖向位移及修正系数的影响，构建修正系数无量纲经验公式，建立落锤冲击力计算模型，并验证其可靠性。结果表明：套筒厚度对冲击竖向位移并无太大影响；冲击速度、落锤质量对冲击力及竖向位移有明显影响；修正系数与冲击速度呈正相关，与落锤质量呈负相关；提出的落锤冲击力计算模型能够有效预测落锤冲击力峰值，且与Hertz弹性理论及Thornton弹塑性理论计算模型进行对比，结果吻合良好。

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 impact 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 dimensionless 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 models based on Hertz elastic theory and Thornton elastic-plastic theory. The findings can provide a theoretical basis for the protection of structures under drop hammer impacts.

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references

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