Damage assessment of recycled aggregate concrete filled-steel tubular column under impact load

被引：0

作者：

Chen, Huayan ^{[1
]}

Liu, Yongbin ^{[1
]}

Luo, Caisong ^{[1
]}

Huang, Jianzhong ^{[1
]}

Xu, Li ^{[1
]}

Fu, Chaojiang ^{[1
]}

Qi, Ai ^{[2
]}

机构：

[1] Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, Fujian University of Technology, Fuzhou

[2] College of Civil Engineering, Fuzhou University, Fuzhou

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 12期

关键词：

damage assessment; drop hammer impact; finite element simulation; impact energy; recycled aggregate concrete filled-steel tubular column;

D O I：

10.13465/j.cnki.jvs.2024.12.012

中图分类号：

学科分类号：

摘要：

To study the damage of a recycled aggregate concrete filled-steel tubular (RACFST) column under impact load, 16 RACFST columns were subjected to drop hammer impact tests. Based on the test, a finite element model of RACFST was established to analyze the influence of different impact velocity, impact mass and section steel content on the damage degree of the RACFST columns. By controlling impact mass and impact velocity, damage assessment grades were divided based on damage factor d^ and elastic-plastic angle 0, and the damage assessment curves of the RACFST columns were fit by simulation. The results show that the difference between FEM results and experimental results is less than 10%, and the former can reflect the change of the latter. The peak time of mid-span deflection in the impact process lagged far behind the peak time of impact force, and impulse is 1. 23 times of momentum. With the increase of impact velocity, the mid-span deflection increases in a parabolic trend. The increase of impact mass has little effect on the peak of impact force but has great effect on the mid-span deflection. With the increase of steel content in the section, the energy consumption of the member almost stabilizes around 90% . The overall damage and local damage of the RACFST columns could be quickly judged from the damage curve. © 2024 Chinese Vibration Engineering Society. All rights reserved.

引用

页码：97 / 108

页数：11

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