Experimental and numerical simulation of explosion resistance of composite structure of shallow-buried box steel structure and polyurethane elastomer supports under the action of ground explosion

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-11-27 DOI:10.1016/j.tws.2024.112751

Hang Xu , Youquan Qin , Weifeng Zhang , Yingxiang Wu , Tainian Chen , Yunke Lu , Xiangyu Xu

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引用次数: 0

Abstract

The light weight of thin-walled steel structures and their ease of transport and installation have great advantages for protection works that need to be constructed quickly. With the improvement of weapon accuracy and destructive effects, there is an urgent need to improve the resistance of shallow buried steel protection works. However, according to the design concept of traditional protection structures relying on the strength of materials and structural rigidity to resist explosive load, the size of structural components will also increase, and the advantage of rapid construction is seriously reduced. In this study, a composite structure (hereinafter referred to as a composite structure) consisting of a polyurethane elastomer (PUE) set as supports underneath a box steel structure consisting of sandwich plates is proposed to improve the blast resistance of shallow buried box steel structures from ground explosions without increasing the size of the components. Explosive tests and numerical simulations were used to study the blast resistance of the composite structure and its blast resistance mechanism. Other factors affecting the blast resistance of the composite structure, such as the PUE stress-strain relationship and thickness and arrangement of the PUE supports, were also analyzed. The results show that the composite structure is able to generate overall motion and convert part of the explosive energy into kinetic energy of the overall motion of the structure, which is absorbed by the PUE support, thus reducing the structural load and internal force while decreasing deformation and improving the blast resistance performance. While the PUE stress-strain relationship and arrangement of the composite structure have a significant impact on the enhancement of blast resistance, the influence of the thickness of the PUE support is small.

查看原文本刊更多论文

浅埋箱钢结构与聚氨酯弹性体支架复合结构在地面爆炸作用下的抗爆性能试验与数值模拟

薄壁钢结构重量轻，便于运输和安装，对于需要快速施工的防护工程具有很大的优势。随着武器精度和杀伤效果的提高，迫切需要提高浅埋钢防护工程的抗冲击能力。但是，按照传统的依靠材料强度和结构刚度来抵抗爆炸载荷的防护结构的设计理念，结构构件的尺寸也会增大，快速施工的优势严重降低。为了在不增加构件尺寸的情况下提高浅埋箱钢结构的抗地面爆炸能力，本研究提出在夹芯板箱钢结构下部设置聚氨酯弹性体（PUE）作为支撑的复合结构（以下简称复合结构）。通过爆炸试验和数值模拟研究了复合材料结构的抗爆性能及其抗爆机理。分析了影响复合材料结构抗爆性能的其他因素，如PUE应力-应变关系、PUE支架的厚度和布置。结果表明，复合结构能够产生整体运动，并将部分爆炸能量转化为结构整体运动的动能，被PUE支架吸收，从而在减小结构载荷和内力的同时减小变形，提高抗爆性能。PUE的应力-应变关系和复合结构的布置对增强抗爆性能有显著影响，而PUE支架厚度的影响较小。

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

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.