车辆碰撞作用下带剪切键预制节段柱的数值研究

IF 2.6 3区工程技术 Q2 ENGINEERING, CIVIL

Structure and Infrastructure Engineering Pub Date : 2023-10-16 DOI:10.1080/15732479.2023.2266745

Min Wu, Youyi Zeng, Liu Jin, Xiuli Du

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引用次数: 0

摘要

摘要:众所周知，预制技术因其施工周期短、环境友好等优点，得到了迅速的发展和应用。在所有预制结构中，预制节段柱在桥梁下部结构中得到了广泛的关注。预制节段柱不仅要承受地震荷载，还要承受车辆和驳船的碰撞。预制节段柱的混凝土节段受到车辆碰撞，容易发生滑移甚至打孔破坏。为了提高混凝土管片间的抗剪能力，设计了带剪切键的预制管片柱，并对其在车辆碰撞作用下的动力性能和剪切机理进行了分析。结果表明:剪切键提高了管片间的抗剪能力，有效减小了管片间的相对位移，使预制管片柱在车辆碰撞作用下的变形模式由剪切型转变为弯曲型;带剪切键的预制节段柱的最大冲击力大于不带剪切键的预制节段柱。揭示了预制节段柱的抗剪机理，提出了局部抗剪承载力的计算公式。关键词:预制件柱剪键车辆碰撞冲击力变形适度位移剪切机制失效模式披露声明作者声明他们没有已知的竞争经济利益或个人关系可能会影响本文所报道的工作。本研究得到国家自然科学基金项目(No. 51978022、51421005、52208458)和湖南省自然科学基金项目(No. 2023JJ40045)的支持。

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Numerical study of precast segment columns with shear keys under vehicle collision

AbstractIt is commonly understood that precast technology has been rapid development and application due to its short construction period and environmental friendly, etc. Among all precast structure, precast segment column has been widely concerned in the substructure of bridges. The precast segment columns will not only suffer from the earthquake loads but also be subjected to the collision of vehicle and barges. The concrete segments of precast segment column subjected to vehicle collision are prone to slip and even punching failure. In order to enhance the shear resistance between concrete segments, the precast segment column with shear key is designed, and the dynamic performance and shear mechanism under vehicle collision are analysed in this work. The results indicate that the shear key improves the shear capacity between segments and effectively reduces the relative displacement between segments, and makes the deformation mode of precast segment column change from shear type to bending type under vehicle collision. The maximum impact force of precast segment column with shear key is larger than that without shear key. Besides, the shear mechanism of precast segment column is revealed, and the calculation formula of local shear resistance is proposed.Keywords: Precast segment columnshear keysvehicle collisionimpact forcedeformation moderelative displacementshear mechanismfailure modes Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.Additional informationFundingThis research was supported by the National Natural Science Foundation of China (Nos. 51978022, 51421005, and 52208458), and the Natural Science Foundation of Hunan Province (No. 2023JJ40045).

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来源期刊

Structure and Infrastructure Engineering 工程技术-工程：机械

CiteScore

9.50

自引率

8.10%

发文量

131

审稿时长

5.3 months

期刊介绍： Structure and Infrastructure Engineering - Maintenance, Management, Life-Cycle Design and Performance is an international Journal dedicated to recent advances in maintenance, management and life-cycle performance of a wide range of infrastructures, such as: buildings, bridges, dams, railways, underground constructions, offshore platforms, pipelines, naval vessels, ocean structures, nuclear power plants, airplanes and other types of structures including aerospace and automotive structures. The Journal presents research and developments on the most advanced technologies for analyzing, predicting and optimizing infrastructure performance. The main gaps to be filled are those between researchers and practitioners in maintenance, management and life-cycle performance of infrastructure systems, and those between professionals working on different types of infrastructures. To this end, the journal will provide a forum for a broad blend of scientific, technical and practical papers. The journal is endorsed by the International Association for Life-Cycle Civil Engineering ( IALCCE) and the International Association for Bridge Maintenance and Safety ( IABMAS).