传统木玻璃窗在特殊动荷载作用下的试验与数值分析

IF 6.5 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Martin Ščotka, Zuzana Papánová
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引用次数: 0

摘要

如今,传统的木窗在仍在使用的旧建筑的玻璃部分中仍然很显眼。越来越多的情况下,它们必须承受特殊的动态载荷,如爆炸、鸟类碰撞或各种自然灾害。从机械的角度来看,它们的阻力是一个重大的缺点,特别是当它们在这些极端情况下承受动态冲击载荷时。为了增加玻璃窗填充物的阻力,目前正在使用各种安全功能。其中之一是聚对苯二甲酸乙二醇酯基安全箔(PET)。然而,它对玻璃承载能力的影响是值得怀疑的。就研究背景而言,可以说全球已有多个研究团队对窗系统阻力的部分问题进行了深入的研究。目前还没有一个更全面的单独分析和对“传统木窗”与爆炸、冲击和额外箔加固的关系的关注。本文的目的是比较传统木窗的玻璃填充材料在使用安全箔加固之前和之后两种情况下承受特殊动载荷的阻力。在实验阶段,两种测试样品都经受了硬体冲击和爆炸。目前,动力学多个分支研究的一个重要组成部分是将实验方法与数值方法相结合。为实现研究目标所采用的方法包括两种基本方法:一种是与分析工具相关联的室内实验,以调整有限元方法(FEM)模型的输入;另一种是与调整后的有限元模型进行对比的现场实验,以得出可供实践和进一步研究的结论。本文在ANSYS Workbench系统界面中对实验得到的参数进行了基于有限元法的数值模拟验证。本文提出的主要研究成果之一是对传统木窗的爆炸和硬体撞击行为进行了调整的计算模型,该模型清楚地确定了对其单个结构部件进行建模的问题和挑战。本文的主要结论之一是PET箔对传统木窗的静态承载能力的最小有效性,在极端冲击载荷的动态响应中略有增加的阻尼,以及在玻璃填充物倒塌时防止玻璃碎片破碎的高有效性。实验条件下的7次摆锤试验、2种不同炸药的6次爆炸试验,以及6种固有模态和固有频率的识别,都支持了上述结论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental and numerical analysis of traditional wooden glass windows subject to extraordinary dynamic loads
Traditional wooden windows are still prominently present today among the glass parts of older, still-used buildings. Increasingly often, they must withstand extraordinary dynamic loads such as explosions, bird collisions or various natural disasters. From a mechanical standpoint, their resistance is a significant drawback, especially when under the dynamic impact loads to which they are subjected in these extreme situations. To increase the resistance of glass window infills, various safety features are currently in use. One of them is polyethylene terephthalate-based safety foil (PET). However, its effect on the load-bearing capacity of glass is questionable. In terms of the background of the research, it can be stated that a number of research teams around the world have addressed the partial issues of window system resistance in depth. A more comprehensive connection of individual analyses and a focus on “traditional wooden windows” in relation to explosion, impact and additional foil reinforcement has not yet been performed. The aim of this paper is to compare the resistance of the glass infills of traditional wooden windows subjected to extraordinary dynamic load in both cases – before and after their reinforcement with safety foil. In the experimental phase, both tested samples are subjected to hardbody impact and explosion. An essential part of research in multiple branches of dynamics is currently the linking of experimental and numerical methods. The methodology used to achieve the research objective consists of two fundamental approaches: an in-lab experiment correlated with analytical tools in order to tune the inputs for the Finite Element Method (FEM) model, and an in-situ experiment compared with the tuned FEM model to derive conclusions for practice and further research. The paper provides a verification of the experimentally obtained parameters by numerical modeling based on the finite element method in the ANSYS Workbench system interface. One of the main results of the research presented in this paper was a tuned computational model of a traditional wooden window in terms of its behavior towards explosion and hard body impact, which clearly identifies the problems and challenges of modelling its individual structural parts. One of the main conclusions of the paper is the minimal effectiveness of the PET foil for the static load-bearing capacity of the traditional wooden window, its slightly increased damping in dynamic response to extreme impact loads and its high effectiveness in protecting against shattering glass fragments at the collapse of the glass infill. These conclusions are supported by detailed analyses of a series of 7 pendulum test measurements under laboratory conditions, 6 explosion measurements of two different explosives, and the identification of 6 natural modes and natural frequencies of vibration.
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来源期刊
CiteScore
7.60
自引率
19.40%
发文量
842
审稿时长
63 days
期刊介绍: Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation). The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.
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