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首页> 外文期刊>International journal of structural stability and dynamics >Development of a New Fence Type Blast Wall for Blast Protection: Numerical Analysis
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Development of a New Fence Type Blast Wall for Blast Protection: Numerical Analysis

机译：开发新型栅栏型爆破墙用于爆炸保护：数值分析

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摘要

Blast wall is considered to be an effective passive measure for blast protection since it can effectively reduce the blast loads and protect the building structures and people behind it. However, the current practice in blast wall design mainly depends on the structural strength and ductility to resist blast loads. These designs often lead to huge solid walls which are not only expensive, but also unsuitable for construction in urban areas, as they are not aesthetically appealing. Moreover, failure of solid blast wall may generate a significant amount of debris, which imposes great threats to people and structures behind the wall. In this paper, a new fence type blast wall, instead of the solid wall, is proposed to resist the blast loads based on the concept of wave interference. The proposed fence wall uses structural columns placed at strategic locations as wave stoppers to generate wave reflection, diffraction and interaction between the reflected and diffracted waves from different columns to result in self-cancellation of wave energy, thus leads to substantial reduction in blast wall size in design. Numerical simulations are carried out to investigate the effectiveness of the fence wall layout with different column geometries, column spacing, column dimensions, and fence layers on blast loads reduction. Based on the results, an effective design of the fence type blast wall is proposed, which can reduce the pressure and impulse of the blast loads behind the wall upto 70%.
机译：爆炸墙被认为是一种有效的爆炸保护的被动措施，因为它可以有效地减少爆炸载荷并保护建筑物结构和背后的人。然而，爆炸墙设计目前的实践主要取决于抵抗爆破载荷的结构强度和延展性。这些设计通常导致巨大的坚固墙，不仅昂贵，而且不适合城市地区的建设，因为它们不是美观的吸引力。此外，固体鼓风壁的失效可能会产生大量的碎片，这对墙壁后面的人和结构施加了巨大的威胁。本文提出了一种新的栅栏型爆破壁，而不是固体壁，以抵抗基于波干的概念的爆破载荷。所提出的围栏壁使用在战略位置处的结构柱作为波挡块，以产生来自不同柱的反射和衍射波之间的波反射，衍射和相互作用，从而导致波能的自消除，从而导致爆破壁尺寸的显着降低在设计中。进行了数值模拟，以研究围栏墙面布局与不同柱几何形状，柱间距，柱尺寸和围栏的有效性在爆破载荷上减少。基于结果，提出了一种有效的围栏式爆破墙的设计，可以降低墙壁后面的爆破载荷的压力和脉冲，高达70％。

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