FRP筋/钢筋混合配筋混凝土梁冲击响应简化分析与预测

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (13) : 44-53.

冲击与爆炸

FRP筋/钢筋混合配筋混凝土梁冲击响应简化分析与预测

张仁波，李昕晨，金浏*，杜修力

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Simplified analysis and prediction of impact response of FRP bars/steel bars hybrid-reinforced concrete beams

ZHANG Renbo, LI Xinchen, JIN Liu*, DU Xiuli

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文章历史 +

摘要

针对目前试验和数值模拟方法复杂且低效的问题，本文研究了纤维增强聚合物（fiber-reinforced polymer，FRP）筋/钢筋混合配筋混凝土梁在冲击荷载下的动态响应的简化分析与预测方法。首先，建立了混合配筋混凝土梁的动态弯-剪抗力模型。其次，基于此模型并考虑应力波传播效应，提出了一种改进的双自由度简化分析模型来预测混合配筋混凝土简支梁的冲击响应，并验证了该模型的准确性。最后，基于量纲分析，通过对双自由度模型计算的120组冲击工况的结果进行回归分析，建立了混合配筋梁的峰值位移和冲击力时程曲线的经验性预测模型。结果表明：该模型的预测误差基本在20%以内，可为混合配筋混凝土简支梁在冲击荷载作用下的工程实践提供一种有效的简化计算方法。

Abstract

To address the complexity and inefficiency of the current experimental and numerical simulation methods, a simplified analysis and prediction method for the dynamic response of fiber-reinforced polymer (FRP)/steel hybrid-reinforced concrete beams under impact loads was investigated. Firstly, a dynamic bending-shear resistance model of hybrid-reinforced concrete beams was established. Subsequently, based on this model and considering the stress wave propagation effect, an improved two degree of freedom simplified analytical model was proposed to predict the impact response of hybrid-reinforced concrete simply supported beams, and the accuracy of the model was verified. Finally, based on the dimensional analysis, an empirical prediction model of the peak displacement and impact force time history curves of the hybrid-reinforced beams was established by regression analysis of the results of 120 sets of impact conditions calculated with the two degree of freedom model. The results show that the prediction error of the model was basically within 20%, which provides an effective and simplified calculation method for the engineering practice of the hybrid-reinforced concrete simply supported beams under impact loads.

导出引用

张仁波, 李昕晨, 金浏, 杜修力. FRP筋/钢筋混合配筋混凝土梁冲击响应简化分析与预测[J]. 振动与冲击, 2025, 44(13): 44-53

ZHANG Renbo, LI Xinchen, JIN Liu, DU Xiuli. Simplified analysis and prediction of impact response of FRP bars/steel bars hybrid-reinforced concrete beams[J]. Journal of Vibration and Shock, 2025, 44(13): 44-53

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