【摘要】：離子性中間膜SGP夾層玻璃相對(duì)于PVB夾層玻璃,具有更優(yōu)異的力學(xué)性能和耐久性,在目前的大型公共建筑和超高層建筑玻璃幕墻中得到了廣泛的應(yīng)用,尤其是目前應(yīng)用很廣泛的點(diǎn)支承形式玻璃幕墻。當(dāng)今世界范圍內(nèi),恐怖爆炸襲擊頻繁發(fā)生,爆炸發(fā)生時(shí),玻璃幕墻作為建筑的外圍護(hù)結(jié)構(gòu)最先受到爆炸沖擊荷載的作用,產(chǎn)生的飛射玻璃碎片造成了大量人員傷亡,因此研究玻璃幕墻在爆炸荷載作用下的響應(yīng)對(duì)于該類構(gòu)件的合理設(shè)計(jì)以及抗爆防護(hù)很有必要。截止目前為止,點(diǎn)支式SGP夾層玻璃幕墻在爆炸作用下的響應(yīng)研究還未見任何文獻(xiàn),本文正是在此背景下,開展點(diǎn)支式SGP夾層玻璃幕墻的抗爆研究,論文研究工作主要包括以下幾部分:(1)為了獲得SGP材料在高應(yīng)變率下的本構(gòu)關(guān)系,采用Instran拉伸試驗(yàn)機(jī)和分離式霍普金森拉桿進(jìn)行了SGP膠片低應(yīng)變率和高應(yīng)變率下的拉伸試驗(yàn),同時(shí)考慮了環(huán)境溫度的影響,分析了應(yīng)變率和環(huán)境溫度的變化對(duì)SGP材性的影響規(guī)律,擬合了不同狀態(tài)下SGP的本構(gòu)關(guān)系,同時(shí)對(duì)SGP和PVB兩種夾層的材性進(jìn)行了對(duì)比。(2)以有限元軟件ANSYS/LS-DYNA作為分析平臺(tái),建立了點(diǎn)支式夾層玻璃面板的有限元模型,采用CONWEP方法施加爆炸荷載,并把得到的位移響應(yīng)與文獻(xiàn)中試驗(yàn)結(jié)果進(jìn)行對(duì)比,把有限元模型上提取到的反射波峰值超壓和正壓作用時(shí)間與試驗(yàn)及經(jīng)驗(yàn)公式算出的結(jié)果進(jìn)行對(duì)比,最終得出本文所建有限元模型基于CONWEP方法的爆炸分析是準(zhǔn)確可行的結(jié)論。在此基礎(chǔ)上,利用該有限元模型,進(jìn)行了爆炸荷載作用下的數(shù)值模擬,得到點(diǎn)支式SGP夾層玻璃面板的三種典型破壞模式,并對(duì)其破壞規(guī)律進(jìn)行了總結(jié)。(3)開展系統(tǒng)的參數(shù)分析,分析了點(diǎn)支式SGP夾層玻璃幕墻夾層厚度、玻璃層厚度、長寬比、面積等幾何參數(shù)的改變對(duì)變形時(shí)程、面板應(yīng)力分布、破壞模式等爆炸響應(yīng)的影響,得到增加鋼化玻璃厚度、減小面板面積和長寬比可顯著提高玻璃幕墻的抗爆能力的結(jié)論。(4)討論了確定超壓-沖量曲線的方法,并且確定了特定規(guī)格點(diǎn)支式SGP夾層玻璃面板的超壓-沖量曲線,采用此曲線進(jìn)行了三種典型TNT當(dāng)量下的爆炸破壞評(píng)估,可確定爆炸防護(hù)安全距離,以指導(dǎo)實(shí)際工程設(shè)計(jì)。
[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.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU382;TU352.13

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