Prestressed concrete slabs subjected to low-velocity impact: Theoretical analysis model and design method

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2024-10-09 DOI:10.1016/j.engfailanal.2024.108949

Zeyi Wang , Quanquan Guo

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引用次数: 0

Abstract

Bidirectional bonded prestressed concrete (PS) structures are widely used in energy engineering structures due to their excellent impermeability. Owing to the particularity of the structure and the severity of damage consequences, the impact dynamic performance of bidirectional bonded PS structures has been widely concerned. Nonetheless, the existing researches focus on the test and finite element, and lacks the theoretical analysis model that can consider the whole process of load action, let alone the corresponding anti-impact design method. Therefore, based on the existing test and finite element results, the resistance function model of bidirectional bonded PS slab is proposed in this paper, and the anti-impact design method is formed. Firstly, the performance of specimens under low-velocity impact loading and quasi-static loading conditions is compared, and the effects of inertia force and material strain rate on the dynamic performance of specimens under low-velocity impact are further explored. Then, a resistance function theoretical analysis model that can consider the whole process of load action is proposed with a quadrilinear form, and the analytical expressions of resistance and stiffness at characteristic points are derived. Subsequently, the accuracy of the resistance function model is verified based on the existing test results. Furthermore, based on the resistance function model, the influence laws of compressive strength of concrete, prestressing degree, reinforcement ratio of reinforcement and slab thickness on slab resistance are analyzed. Finally, an anti-impact design method considering perforation and scabbing failure is proposed, and the feasibility of the design method is verified by impact test results.

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受低速冲击的预应力混凝土板：理论分析模型和设计方法

双向粘结预应力混凝土（PS）结构因其优异的抗渗性能而被广泛应用于能源工程结构中。由于结构的特殊性和破坏后果的严重性，双向粘结预应力混凝土结构的冲击动力性能受到广泛关注。然而，现有的研究主要集中在试验和有限元方面，缺乏考虑荷载作用全过程的理论分析模型，更没有相应的抗冲击设计方法。因此，本文基于现有的试验和有限元结果，提出了双向粘结 PS 板的阻力函数模型，并形成了抗冲击设计方法。首先，比较了试样在低速冲击加载和准静态加载条件下的性能，进一步探讨了惯性力和材料应变率对试样在低速冲击下动态性能的影响。然后，提出了一个能考虑荷载作用全过程的四边形阻力函数理论分析模型，并推导出了特征点阻力和刚度的解析表达式。随后，根据现有的测试结果验证了阻力函数模型的准确性。此外，基于阻力函数模型，分析了混凝土抗压强度、预应力度、钢筋配筋率和板厚度对板阻力的影响规律。最后，提出了考虑穿孔和结痂破坏的抗冲击设计方法，并通过冲击试验结果验证了该设计方法的可行性。

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

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.