Impact resistance for ECC-RC bridge columns protected by an innovative steel-GFRP-foam anti-collision device: Experimental, numerical and theoretical analysis

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-09-19 DOI:10.1016/j.compstruct.2025.119667

Yi Cheng , Wenwei Wang , Zhongfeng Zhu , Yifeng Zhong , Yixing Tang

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引用次数: 0

Abstract

Considering satisfying the crashworthy demands for engineered cementitious composite (ECC)-reinforced concrete (RC) columns in bridge protection engineering, an innovative steel-glass fiber reinforced polymer (GFRP)-foam anti-collision device was proposed. Low-velocity collision experiments were taken to clarify the impact resistance for ECC-RC columns with the developed protective structure. Based on a calibrated numerical model, three important parameters were adopted to compare their effects on the specimen impact behaviors. An improved theoretical model considering the ECC fracture failure was derived to predict the initial energy consumption of composite columns with a steel-GFRP-foam device. Test results demonstrated that both the damage mode and collision responses for ECC-RC columns were extremely attenuated through the steel plastic yielding, GFRP buckling deformation and foam compressive-shear failure in this anti-collision device. Meanwhile, the stronger local stiffness of ECC strengthening composites was less conducive to a reasonable crashworthy design compared with the steel-GFRP-foam anti-collision structure. Simulation results indicated that the development of overall impact responses was mainly affected by the ECC-RC interface localization. Analytical results illustrated that the modified theoretical model was expected to be applied in the crashworthy design codes for strengthened bridge structures. These works provided some novel research ideas for the bridge anti-collision field.

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新型钢- gfrp -泡沫防撞装置保护ec - rc桥柱的抗冲击性：实验、数值和理论分析

为满足工程胶凝复合材料(ECC)-钢筋混凝土（RC）柱在桥梁防护工程中的耐撞要求，提出了一种新型的玻璃钢泡沫防撞装置。采用低速碰撞试验研究了混凝土柱的抗冲击性能。在标定数值模型的基础上，采用三个重要参数比较了它们对试件冲击行为的影响。推导了考虑ECC断裂破坏的改进理论模型，用于预测钢- gfrp -泡沫装置组合柱的初始能耗。试验结果表明，该防撞装置通过钢塑屈服、玻璃钢屈曲变形和泡沫压剪破坏，极大地减弱了ECC-RC柱的损伤模式和碰撞响应。同时，与钢- gfrp -泡沫防撞结构相比，ECC增强复合材料的局部刚度较强，不利于合理的耐撞设计。仿真结果表明，整体冲击响应的发展主要受ECC-RC界面局部化的影响。分析结果表明，修正后的理论模型有望应用于加固桥梁结构的抗碰撞设计规范中。这些工作为桥梁防撞领域提供了一些新的研究思路。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.