爆炸载荷下中空钢化夹层玻璃动力响应研究
发布时间：2018-11-05 17:47
【摘要】：中空钢化夹层玻璃是一种现代高层建筑新型的玻璃幕墙复合结构,具有保温隔热、隔音、抗冷凝等优良性能,还具有抵抗一定的载荷和冲击力的作用,其结合了中空玻璃与夹层玻璃的优点,使之在近几年时间里逐渐成为现代高层建筑玻璃幕墙的首选。由于一些人为或者不可避免的自然因素造成的灾害仍然威胁着大家的安全。所以为了保证人员及财产的安全,避免由于灾害致使室内人员受到玻璃碎片飞溅的伤害,中空钢化夹层玻璃的抗爆性能研究是国内外研究的热点及必要。根据近几年国内外学者在玻璃幕墙抗爆性能方面的工作及研究成果,本文采用有限元模拟与理论分析的手段,研究了爆炸载荷作用下中空钢化夹层玻璃的动力响应。具体的研究内容包括:(1)利用LS-DYNA有限元软件,建立了中空夹层玻璃模型,并基于多物质ALE算法模拟了在35g TNT,爆距为50cm时中空夹层玻璃的动力学响应,通过变化PVB夹层属性和中空气体层厚度分析了其变化对玻璃板动态响应的影响。(2)相同工况下,利用LS-DYNA软件,分别对比了中空夹层玻璃与夹层玻璃以及中空夹层玻璃与中空玻璃的板心挠度,依此来对比这三种玻璃的抗爆性能,其对比结果为抗爆玻璃的选型和设计提供科学参考依据。(3)基于薄板的小挠度理论和玻璃等效厚度计算规范,对爆炸载荷作用下的中空钢化夹层玻璃的挠度进行了理论计算,将理论得到的板心挠度最大值与数值模拟得到的值进行了比拟验证。通过以上几方面的研究,得到主要结论有:1、爆炸载荷下的中空钢化夹层玻璃下板心的挠度较上板心的挠度大,表明受爆炸载荷的中空夹层玻璃,其下板受到的影响较上板明显。(1)随着气体层厚度的增加,中空钢化夹层玻璃的上层玻璃板挠度减小,而下层玻璃板挠度增加,表明中空气体层的厚度越大,其下层玻璃越容易破坏。且在中空气体层厚度为12mm时,板心最大挠度变化率发生突变。(2)一定气体层厚度下,随PVB夹层杨氏模量的增加,上下玻璃板的挠度均减小。且PVB杨氏模量达到500MPa时,板心最大挠度变化率发生突变。因此在该工况下,中空气体层厚度不应该超过12mm,而PVB杨氏模量不应该小于500MPa。2、相同尺寸的中空夹层玻璃相比于夹层玻璃,中空夹层玻璃内侧玻璃板心最大挠度较夹层玻璃减小了1/4;相同工况下的中空钢化夹层玻璃上下玻璃板相比于中空玻璃,其挠度分别减小了1/2与1/3。综合上述两种对比结果,都表明中空钢化夹层玻璃有更好的抗爆性。
[Abstract]:Hollow toughened laminated glass is a new type of glass curtain wall composite structure of modern high-rise building. It has excellent properties such as heat insulation, sound insulation, anti-condensation and so on, and also has the function of resisting certain load and impact. It combines the advantages of insulating glass and laminated glass, making it the first choice of glass curtain wall of modern high-rise building in recent years. Disasters caused by some man-made or unavoidable natural factors still threaten everyone's safety. Therefore, in order to ensure the safety of personnel and property and avoid the damage of indoor personnel caused by the damage caused by glass fragments, the research on the anti-explosion performance of hollow toughened laminated glass is a hot topic and necessary at home and abroad. According to the work and research achievements of domestic and foreign scholars in the field of anti-explosion performance of glass curtain wall in recent years, the dynamic response of hollow toughened laminated glass under explosion load is studied by means of finite element simulation and theoretical analysis. The specific research contents are as follows: (1) the hollow laminated glass model is established by using LS-DYNA finite element software, and the dynamic response of the hollow laminated glass is simulated based on the multi-material ALE algorithm when the explosion distance of 35g TNT, is 50cm. By changing the properties of PVB interlayer and the thickness of hollow gas layer, the influence of the change on the dynamic response of glass plate is analyzed. (2) under the same working condition, the LS-DYNA software is used. The plate center deflection of the hollow laminated glass and the sandwich glass and the hollow laminated glass and the hollow glass are compared respectively, and the explosion-resistant properties of the three kinds of glass are compared according to the deflection of the plate center of the hollow laminated glass and the hollow laminated glass. The results provide a scientific reference for the selection and design of explosion-resistant glass. (3) the theory of small deflection based on thin plate and the equivalent thickness calculation specification of glass. The deflection of hollow toughened laminated glass subjected to explosive loading is calculated theoretically and the maximum deflection of plate center obtained by the theory is compared with the value obtained by numerical simulation. The main conclusions are as follows: 1. The deflection of the hollow toughened laminated glass core under explosive load is larger than that of the upper plate core, which indicates that the hollow laminated glass subjected to explosive load has a larger deflection than that of the upper plate core. (1) with the increase of the thickness of the gas layer, the deflection of the upper glass plate of the hollow toughened laminated glass decreases, while the deflection of the lower layer of the glass plate increases, which indicates that the thickness of the hollow gas layer increases. The lower the glass, the easier it is to break. When the thickness of the hollow gas layer is 12mm, the maximum deflection of the plate center changes suddenly. (2) with the increase of the Young's modulus of the PVB interlayer, the deflection of the upper and lower glass plates decreases with the increase of the thickness of the gas layer. When the Young's modulus of PVB reaches 500MPa, the maximum deflection of plate center changes suddenly. Therefore, under this condition, the thickness of the hollow gas layer should not exceed 12mm, and the Young's modulus of PVB should not be less than 500MPa.2.The same size of hollow laminated glass should be compared to the laminated glass. The maximum deflection of the inner glass core of the hollow laminated glass is 1 / 4 less than that of the laminated glass. The deflection of the upper and lower glass plates of the hollow toughened laminated glass under the same working conditions is reduced by 1 / 2 and 1 / 3 respectively compared with the hollow glass. The results show that the hollow toughened laminated glass has better explosion resistance.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.39
本文编号：2312841
[Abstract]:Hollow toughened laminated glass is a new type of glass curtain wall composite structure of modern high-rise building. It has excellent properties such as heat insulation, sound insulation, anti-condensation and so on, and also has the function of resisting certain load and impact. It combines the advantages of insulating glass and laminated glass, making it the first choice of glass curtain wall of modern high-rise building in recent years. Disasters caused by some man-made or unavoidable natural factors still threaten everyone's safety. Therefore, in order to ensure the safety of personnel and property and avoid the damage of indoor personnel caused by the damage caused by glass fragments, the research on the anti-explosion performance of hollow toughened laminated glass is a hot topic and necessary at home and abroad. According to the work and research achievements of domestic and foreign scholars in the field of anti-explosion performance of glass curtain wall in recent years, the dynamic response of hollow toughened laminated glass under explosion load is studied by means of finite element simulation and theoretical analysis. The specific research contents are as follows: (1) the hollow laminated glass model is established by using LS-DYNA finite element software, and the dynamic response of the hollow laminated glass is simulated based on the multi-material ALE algorithm when the explosion distance of 35g TNT, is 50cm. By changing the properties of PVB interlayer and the thickness of hollow gas layer, the influence of the change on the dynamic response of glass plate is analyzed. (2) under the same working condition, the LS-DYNA software is used. The plate center deflection of the hollow laminated glass and the sandwich glass and the hollow laminated glass and the hollow glass are compared respectively, and the explosion-resistant properties of the three kinds of glass are compared according to the deflection of the plate center of the hollow laminated glass and the hollow laminated glass. The results provide a scientific reference for the selection and design of explosion-resistant glass. (3) the theory of small deflection based on thin plate and the equivalent thickness calculation specification of glass. The deflection of hollow toughened laminated glass subjected to explosive loading is calculated theoretically and the maximum deflection of plate center obtained by the theory is compared with the value obtained by numerical simulation. The main conclusions are as follows: 1. The deflection of the hollow toughened laminated glass core under explosive load is larger than that of the upper plate core, which indicates that the hollow laminated glass subjected to explosive load has a larger deflection than that of the upper plate core. (1) with the increase of the thickness of the gas layer, the deflection of the upper glass plate of the hollow toughened laminated glass decreases, while the deflection of the lower layer of the glass plate increases, which indicates that the thickness of the hollow gas layer increases. The lower the glass, the easier it is to break. When the thickness of the hollow gas layer is 12mm, the maximum deflection of the plate center changes suddenly. (2) with the increase of the Young's modulus of the PVB interlayer, the deflection of the upper and lower glass plates decreases with the increase of the thickness of the gas layer. When the Young's modulus of PVB reaches 500MPa, the maximum deflection of plate center changes suddenly. Therefore, under this condition, the thickness of the hollow gas layer should not exceed 12mm, and the Young's modulus of PVB should not be less than 500MPa.2.The same size of hollow laminated glass should be compared to the laminated glass. The maximum deflection of the inner glass core of the hollow laminated glass is 1 / 4 less than that of the laminated glass. The deflection of the upper and lower glass plates of the hollow toughened laminated glass under the same working conditions is reduced by 1 / 2 and 1 / 3 respectively compared with the hollow glass. The results show that the hollow toughened laminated glass has better explosion resistance.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.39
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