冲击荷载作用下钢管再生混凝土柱损伤评估分析

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (12) : 97-108.

论文

冲击荷载作用下钢管再生混凝土柱损伤评估分析

陈华艳1，刘用滨1，罗才松1，黄建忠1，许力1，付朝江1，祁皑2

作者信息 +

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

CHEN Huayan1，LIU Yongbin1，LUO Caisong1，HUANG Jianzhong1，XU Li1，FU Chaojiang1，QI Ai2

Author information +

文章历史 +

摘要

为研究钢管再生混凝土柱在冲击荷载作用下的损伤，进行了16根钢管再生混凝土柱的落锤冲击试验。在试验的基础上建立了钢管再生混凝土柱的有限元模型，分析不同冲击速度、冲击质量、截面含钢率对钢管再生混凝土柱损伤程度的影响。通过控制冲击质量与冲击速度，基于损伤因子ds和弹塑性转角θ，划分损伤评估等级，拟合钢管再生混凝土柱损伤评估曲线。结果表明：建立的有限元模型能很好地吻合落锤冲击实验的结果，最大误差不超过10%；冲击过程中跨中挠度峰值出现时间远远滞后于冲击力峰值出现的时间，冲量是动量的1.23倍；随着冲击速度的增加，跨中挠度呈抛物线形的增长趋势，冲击质量增加对冲击力峰值影响较小，但对跨中挠度有较大影响，随着截面含钢率的增加，构件的耗能几乎稳定在90%附近；从损伤曲线图可以快速判断钢管再生混凝土柱的整体损伤情况及局部损伤情况。

Abstract

In order to study the damage of 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, the 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 RACFST column. By controlling impact mass and impact velocity, damage assessment grades were divided based on damage factor ds and elastic-plastic Angle θ, and the damage assessment curves of RACFST columns were fitted 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 was 1.23 times of momentum. With the increase of impact velocity, the mid-span deflection increased in a parabolic trend. The increase of impact mass has little effect on the peak of impact force but has a great effect on the mid-span deflection. With the increase of steel content in the section, the energy consumption of the member almost stabilized around 90%. The overall damage and local damage of the RACFST column could be quickly judged from the damage curve.

导出引用

陈华艳1, 刘用滨1, 罗才松1, 黄建忠1, 许力1, 付朝江1, 祁皑2. 冲击荷载作用下钢管再生混凝土柱损伤评估分析[J]. 振动与冲击, 2024, 43(12): 97-108

CHEN Huayan1, LIU Yongbin1, LUO Caisong1, HUANG Jianzhong1, XU Li1, FU Chaojiang1, QI Ai2. Damage assessment of recycled aggregate concrete filled-steel tubular column under impact load[J]. Journal of Vibration and Shock, 2024, 43(12): 97-108

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