爆炸荷载下的单跨 T 形桥数值模拟

IF 0.7 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
L. Fu, F. L. Huang
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引用次数: 0

摘要

桥梁作为公路运输中跨越河崖的重要枢纽,其防护效果一直是研究的重点。本文利用 LS-DYNA 软件模拟了大型单跨 T 梁桥的爆炸冲击波破坏过程,研究了炸药类型、起爆位置和桥梁配筋对桥面破坏程度的影响。结果表明,在 GOL-2 和 WY-1 炸药中,WY-1 炸药对桥梁破坏的影响最为严重。当仅在 T 型梁翼缘板上铺设钢筋时,与不铺设钢筋相比,桥梁的抗爆性能明显提高。当炸药在桥面的不同位置引爆时,整座桥梁不会受到实质性破坏。但当等效炸药放置在桥墩附近的地面上时,桥墩完全断裂,桥梁坍塌,失去承重功能。研究成果为爆炸荷载下的桥梁保护提供了参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Numerical Simulation of Single-Span T-Shaped Bridge Under Explosion Load

Numerical Simulation of Single-Span T-Shaped Bridge Under Explosion Load

As an important hub for crossing river cliffs in road transportation, the protective effect of bridges has always been the focus of research. In this paper, LS-DYNA software is used to simulate the process of explosion shock wave damage to large single-span T-beam bridge, and the influence of explosive type, detonation position and bridge reinforcement on the damage degree of bridge deck is studied. The results indicate that WY-1 explosive has the most severe impact on bridge damage among GOL-2 and WY-1 explosives. When only reinforcing steel is laid on the flange of the T-beam, the blast resistance performance of the bridge is significantly improved compared to without reinforcing steel. When explosives detonate at different positions on the bridge deck, there is no substantial damage to the entire bridge. But when the equivalent explosive is placed on the ground near the bridge pier, the pier completely fractures, the bridge collapses, and loses its load-bearing function. The research results provide a reference for the protection of bridges under explosive loads.

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来源期刊
Strength of Materials
Strength of Materials MATERIALS SCIENCE, CHARACTERIZATION & TESTING-
CiteScore
1.20
自引率
14.30%
发文量
89
审稿时长
6-12 weeks
期刊介绍: Strength of Materials focuses on the strength of materials and structural components subjected to different types of force and thermal loadings, the limiting strength criteria of structures, and the theory of strength of structures. Consideration is given to actual operating conditions, problems of crack resistance and theories of failure, the theory of oscillations of real mechanical systems, and calculations of the stress-strain state of structural components.
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