SGP高应变率本构及点支式夹层玻璃幕墙爆炸响应研究
发布时间：2018-08-20 12:52
【摘要】：离子性中间膜SGP夹层玻璃相对于PVB夹层玻璃,具有更优异的力学性能和耐久性,在目前的大型公共建筑和超高层建筑玻璃幕墙中得到了广泛的应用,尤其是目前应用很广泛的点支承形式玻璃幕墙。当今世界范围内,恐怖爆炸袭击频繁发生,爆炸发生时,玻璃幕墙作为建筑的外围护结构最先受到爆炸冲击荷载的作用,产生的飞射玻璃碎片造成了大量人员伤亡,因此研究玻璃幕墙在爆炸荷载作用下的响应对于该类构件的合理设计以及抗爆防护很有必要。截止目前为止,点支式SGP夹层玻璃幕墙在爆炸作用下的响应研究还未见任何文献,本文正是在此背景下,开展点支式SGP夹层玻璃幕墙的抗爆研究,论文研究工作主要包括以下几部分:(1)为了获得SGP材料在高应变率下的本构关系,采用Instran拉伸试验机和分离式霍普金森拉杆进行了SGP胶片低应变率和高应变率下的拉伸试验,同时考虑了环境温度的影响,分析了应变率和环境温度的变化对SGP材性的影响规律,拟合了不同状态下SGP的本构关系,同时对SGP和PVB两种夹层的材性进行了对比。(2)以有限元软件ANSYS/LS-DYNA作为分析平台,建立了点支式夹层玻璃面板的有限元模型,采用CONWEP方法施加爆炸荷载,并把得到的位移响应与文献中试验结果进行对比,把有限元模型上提取到的反射波峰值超压和正压作用时间与试验及经验公式算出的结果进行对比,最终得出本文所建有限元模型基于CONWEP方法的爆炸分析是准确可行的结论。在此基础上,利用该有限元模型,进行了爆炸荷载作用下的数值模拟,得到点支式SGP夹层玻璃面板的三种典型破坏模式,并对其破坏规律进行了总结。(3)开展系统的参数分析,分析了点支式SGP夹层玻璃幕墙夹层厚度、玻璃层厚度、长宽比、面积等几何参数的改变对变形时程、面板应力分布、破坏模式等爆炸响应的影响,得到增加钢化玻璃厚度、减小面板面积和长宽比可显著提高玻璃幕墙的抗爆能力的结论。(4)讨论了确定超压-冲量曲线的方法,并且确定了特定规格点支式SGP夹层玻璃面板的超压-冲量曲线,采用此曲线进行了三种典型TNT当量下的爆炸破坏评估,可确定爆炸防护安全距离,以指导实际工程设计。
[Abstract]:Compared with PVB laminated glass, the ionic intermediate membrane SGP laminated glass has more excellent mechanical properties and durability, and has been widely used in glass curtain walls of large public buildings and super high-rise buildings. Especially the point-supported glass curtain wall which is widely used at present. In today's world, terrorist attacks occur frequently. When the explosion occurred, the glass curtain wall, as the outer enclosure of the building, was the first to be affected by the blast impact load, resulting in a large number of casualties caused by flying glass fragments. Therefore, it is necessary to study the response of glass curtain wall under explosion load for reasonable design and anti-explosion protection. Up to now, there has not been any literature on the response of point-supported SGP laminated glass curtain wall under explosion. In this paper, the anti-explosion research of point-supported SGP laminated glass curtain wall is carried out under this background. The research work includes the following parts: (1) in order to obtain the constitutive relation of SGP material at high strain rate, the tensile tests of SGP film at low strain rate and high strain rate were carried out with Instran tensile tester and split Hopkinson rod. At the same time, the influence of environmental temperature on the properties of SGP was analyzed, and the constitutive relation of SGP under different states was fitted. At the same time, the material properties of SGP and PVB are compared. (2) based on the finite element software ANSYS/LS-DYNA, the finite element model of point-supported laminated glass panel is established, and the CONWEP method is used to apply the explosive load. The displacement response obtained is compared with the experimental results in the literature, and the peak overpressure and positive pressure time extracted from the finite element model are compared with the results calculated by the experimental and empirical formulas. Finally, it is concluded that the finite element model based on CONWEP method is accurate and feasible. On this basis, three typical failure modes of point-supported SGP laminated glass panels are obtained by using the finite element model. (3) systematic parameter analysis is carried out. The effect of the geometric parameters such as the thickness of glass layer, the ratio of length to width, the area and other geometric parameters on the explosion response such as deformation time history, stress distribution and failure mode of point-supported SGP laminated glass curtain wall are analyzed, and the thickness of toughened glass is obtained. It is concluded that reducing the panel area and aspect ratio can significantly improve the anti-explosion ability of glass curtain wall. (4) the method of determining the overpressure-impulse curve is discussed, and the overpressure-impulse curve of the SGP laminated glass panel with specific specifications is determined. This curve is used to evaluate the explosion damage under three typical TNT equivalent conditions, and the safety distance of explosion protection can be determined to guide the actual engineering design.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU382;TU352.13
[Abstract]:Compared with PVB laminated glass, the ionic intermediate membrane SGP laminated glass has more excellent mechanical properties and durability, and has been widely used in glass curtain walls of large public buildings and super high-rise buildings. Especially the point-supported glass curtain wall which is widely used at present. In today's world, terrorist attacks occur frequently. When the explosion occurred, the glass curtain wall, as the outer enclosure of the building, was the first to be affected by the blast impact load, resulting in a large number of casualties caused by flying glass fragments. Therefore, it is necessary to study the response of glass curtain wall under explosion load for reasonable design and anti-explosion protection. Up to now, there has not been any literature on the response of point-supported SGP laminated glass curtain wall under explosion. In this paper, the anti-explosion research of point-supported SGP laminated glass curtain wall is carried out under this background. The research work includes the following parts: (1) in order to obtain the constitutive relation of SGP material at high strain rate, the tensile tests of SGP film at low strain rate and high strain rate were carried out with Instran tensile tester and split Hopkinson rod. At the same time, the influence of environmental temperature on the properties of SGP was analyzed, and the constitutive relation of SGP under different states was fitted. At the same time, the material properties of SGP and PVB are compared. (2) based on the finite element software ANSYS/LS-DYNA, the finite element model of point-supported laminated glass panel is established, and the CONWEP method is used to apply the explosive load. The displacement response obtained is compared with the experimental results in the literature, and the peak overpressure and positive pressure time extracted from the finite element model are compared with the results calculated by the experimental and empirical formulas. Finally, it is concluded that the finite element model based on CONWEP method is accurate and feasible. On this basis, three typical failure modes of point-supported SGP laminated glass panels are obtained by using the finite element model. (3) systematic parameter analysis is carried out. The effect of the geometric parameters such as the thickness of glass layer, the ratio of length to width, the area and other geometric parameters on the explosion response such as deformation time history, stress distribution and failure mode of point-supported SGP laminated glass curtain wall are analyzed, and the thickness of toughened glass is obtained. It is concluded that reducing the panel area and aspect ratio can significantly improve the anti-explosion ability of glass curtain wall. (4) the method of determining the overpressure-impulse curve is discussed, and the overpressure-impulse curve of the SGP laminated glass panel with specific specifications is determined. This curve is used to evaluate the explosion damage under three typical TNT equivalent conditions, and the safety distance of explosion protection can be determined to guide the actual engineering design.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU382;TU352.13
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