Vehicle impact prevention behavior of RC bridge piers with UHPC-Bio-inspired honeycomb column thin-walled structure (UHPC-BHTS)

IF 3.9 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2024-10-30 DOI:10.1016/j.istruc.2024.107566

Hongxiang Xia , Xueqian Fang , Shijie Wang , Quansheng Sun

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引用次数: 0

Abstract

In order to reduce the damage of reinforced concrete bridge piers (RCBPs) under vehicle impact scenarios, the Ultra-high performance concrete-Bio-inspired honeycomb column thin-walled structure (UHPC-BHTS) with an attached anti-impact composite structure is designed to enable the pier to resist accidental vehicle impacts during its service life. According to the dynamic response, energy absorption characteristics, and other indicators, the impact protection effectiveness of the UHPC-BHTS composite structure on six RC column specimens with different equivalent heights from 1 to 3.5 m was evaluated. The average proportion of internal energy absorbed by the UHPC-BHTS composite structure was as high as 97.19 %. Then, 48 Ford 800 medium-sized trucks with engine tonnage of 0.64–2 tons and impact speeds of 40–140 km/h were systematically simulated for the vehicle-pier impact condition. Through the test results, it is concluded that the pier protected by the UHPC-BHTS composite structure has a lower damage level than the RCBP without a protective device and can withstand the impact of medium-sized trucks with faster and heavier engines. Finally, based on a new type of damage assessment index, the damage degree of vehicle impact on RCBP was evaluated. The work in this paper can provide a useful reference for the design of RCBP in vehicle impact protection.

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采用超高性能混凝土-生物启发蜂窝柱薄壁结构（UHPC-BHTS）的钢筋混凝土桥墩的车辆撞击预防行为

为了减少钢筋混凝土桥墩（RCBPs）在车辆撞击情况下的损坏，设计了附有抗冲击复合结构的超高性能混凝土-生物启发蜂窝柱薄壁结构（UHPC-BHTS），使桥墩在使用寿命内能够抵抗意外的车辆撞击。根据动态响应、能量吸收特性等指标，评估了 UHPC-BHTS 复合结构对 6 个等效高度从 1 米到 3.5 米不同的 RC 柱试件的冲击防护效果。UHPC-BHTS 复合结构吸收内能的平均比例高达 97.19%。然后，系统模拟了 48 辆福特 800 中型卡车（发动机吨位为 0.64-2 吨，撞击速度为 40-140 km/h）的车辆-支柱撞击条件。试验结果表明，采用 UHPC-BHTS 复合材料结构保护的墩台比不采用保护装置的 RCBP 的损坏程度更低，可以承受速度更快、发动机更重的中型卡车的撞击。最后，基于一种新型损伤评估指标，对车辆撞击 RCBP 的损伤程度进行了评估。本文的研究成果可为车辆撞击防护中的 RCBP 设计提供有益的参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.