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夹层玻璃的耐久性和安全可靠性与其界面粘结性能密切相关。本文首次提出了十字交叉法测量夹层玻璃中PVB胶与玻璃的界面拉伸和剪切粘结强度,分别研究了加载速度效应、PVB胶层厚度效应和湿度老化等的影响。结果表明:测量夹层玻璃中PVB胶与玻璃粘结强度的加载速度应选取5mm/min。当胶合层厚度相同时,界面拉伸粘结强度高于其剪切粘结强度,PVB胶层厚度越大,其拉伸粘结强度和剪切粘结强度都逐渐越低。单层PVB胶片与玻璃之间的界面拉伸粘结强度最大值为11.49MPa。耐湿老化对玻璃与PVB胶的界面粘结强度影响不大,即使老化60天后,其拉伸粘结强度也仅下降12.3%。 相似文献
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热弯夹层玻璃作为安全玻璃的一种重要的形式,应用领域非常广泛,这种产品由两层或多层的热弯玻璃经PVB胶片粘结而成,具有很高的强度和韧性,抗碰撞能力强,安全可靠,透明度高,另外一旦破碎,夹层玻璃承受高速冲击的强度高于钢化玻璃,玻璃破碎后无碎片飞溅,玻璃的碎片仍能粘接在PVB片上。鉴于此特点,热弯夹层玻璃几乎应用于所有汽车玻璃的前风挡领域,同时也广泛的应于建筑门窗幕墙、博物馆、陈列厅等相关领域。 相似文献
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美国首诺公司推出装饰性彩色夹层玻璃的建筑应用中间膜。据介绍,较着色玻璃、透明玻璃、乳白色玻璃而言,以VANCEVA为注册商标的彩色中间膜使夹层玻璃拥有更多选择。它由2层PVB薄膜组合而成,其中一张有10种基本色(有2种透光度的红色、黄色、蓝色、茶色和乳白色),共90种色调,另一张有9种图案式样:大圆点、小圆点、宽条纹、窄条纹、细条纹、方形、点花式、交叉针式、织物花式,也是90种变化,将色彩和图案的2层薄膜进行任意组合,即可组成90×90=8100种彩色装饰效果。这种融技术与美观于一体的彩色夹层玻璃为玻璃设计提供了新的… 相似文献
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为了研究聚乙烯醇缩丁醛夹层玻璃(PVB夹层玻璃)在刚性冲击下的破坏模式和力学响应,采用基于近场动力学的键基PD模型模拟落锤冲击作用下的冲击力的变化情况及玻璃裂纹开展,并与试验结果进行对比验证;通过改变上、下玻璃层厚度、PVB胶层厚度及冲击初速度,系统研究PVB夹层玻璃的裂纹扩展规律和耗能特性。结果表明:键基PD模型可以很好地再现PVB夹层玻璃断裂失效和裂纹扩展行为,和试验吻合度很高;玻璃厚度越厚抗冲击性能和耗能能力越强,下玻璃层厚度影响大于上玻璃层厚度影响。随着PVB胶层厚度的增加,PVB夹层玻璃抗冲击性能以及耗能能力随之增加。同等条件下,增大PVB胶层厚度,能有效增加玻璃的耗能能力,取得较大的单位厚度耗能比,但PVB胶层厚度大于1.14mm后增幅变小。保持冲击能量不变,增大落锤的冲击初速度,明显改变了PVB夹层玻璃的破坏模式,其抗冲击性能和玻璃耗能也随之增加。 相似文献
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Laminated glass – novel and well‐tried. With increasing safety specifications, glass laminates become more important in the use of glass for structural elements. The requirements of laminated glass includes safety against fall arrest, post breakage behaviour and bomb blast resistance. In addition to the structural aspects, laminates of two or more glass panes are nowadays increasingly used for sound insulation, protection against direct or diffuse sunlight etc. Various design possibilities (coloured or printed interlayer, embedding of fabric, papers meshes etc.) are available for a wide range of architectural applications. Parallel to the rising requirements and possibilities of laminated glass, scientific studies concentrated on the mechanical properties of laminates with Polyvinylbutyral (PVB) interlayer and development of new interlayers by the industry. This article compares laminates with different interlayers and shows the results of scientific research. 相似文献
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研制一种能调整室内湿度的乳胶漆,通过高吸水聚合物、硅藻土、凹凸棒粉等材料的协同作用,使漆膜能吸收和释放水蒸气,调整室内空气的相对湿度,使人感觉更舒适。 相似文献
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《The IES Journal Part A: Civil & Structural Engineering》2013,6(1):8-16
Laminated glass (LG) comprises two or more glass plates bonded together with elastomeric interlayer. Automobile and aircraft industries have used LG for years because of its ability to maintain closure of window openings following fracture. In the last decade, the architectural industry began to utilise the potential of LG as the best glazing material for building fenestrations that might experience extreme loadings. Polyvinyl butyral (PVB) interlayer and recently advanced polymer interlayer have relatively small thickness in comparison with that of the glass plates in LG. In addition, the structural properties of the interlayer materials vary radically from those of window glass. These issues make analysis of LG difficult. This article presents a higher order finite element model (FEM) to analyse LG under uniform loading. The formulated model can analyse LG with different glass plate types and different interlayer thicknesses over a wide temperature range. While not as comprehensive as some analytical techniques for LG, this model has the advantage of being able to handle different shapes (rectangular, trapezoidal, triangular, etc.) and boundary conditions. 相似文献
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通过拉伸试验和剪切试验,得到了PVB胶片的材料性能参数,并通过受弯承载力试验,研究夹层玻璃的受力特点,进而分析PVB胶片的厚度、温度变化对其承载能力的影响。试验结果表明:胶片对夹层玻璃的受力性能有显著影响,且胶片的粘结作用不能忽略,随着温度的升高,其承载力降低。运用ANSYS有限元软件对试验模型的受力性能进行数值模拟,有限元计算结果与试验结果吻合较好。试验结果和有限元分析结果均表明:现行国家规范关于夹层玻璃位移的计算值大于试验值和有限元分析值,计算偏于保守。 相似文献
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目前在室内装饰材料中钢化玻璃的发展前景特别广阔。它围护了界面以外的园林景观,湖光山色引入室内,使室内空间由内向外渗透。并能承受一定的荷载,根据室内不同照度的要求,采用不同透明度的玻璃将室外的阳光引入室内,使室内空间暧昧、朦胧,充满诗意。用钢化玻璃制作的隔断具有很强的通透性和纯净性,充满着浓郁的现代气息。 相似文献
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本文研究了R_2O对AgX光色玻璃光色性能的影响,运用透射电子显微镜、红外光谱测定了玻璃的结构,探讨了具有良好光色性能的玻璃组成和结构状态。 相似文献
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Jitka Mohelnikova 《Construction and Building Materials》2009,23(5):1993-1998
Special glass with reflective coatings has found wide applications in architecture. Thin coatings deposited on glass panes modulate the glass optical properties. Some of the coatings operate as a mirror for long-wave infrared radiation of building interiors. The thin films have high transmittance in visible range and very high reflectance in long-wave infrared range. These coatings limit absorption of infrared radiation in the glass. They have low emissivity. It means radiation heat losses of the coated glazing are reduced. The design of coatings for window glazing applications should be based on the study of optical spectral properties of glass and thin film materials. Optical properties of thin films are determined by spectral characteristics as reflectance, transmittance and absorptance for wavelength in a defined spectral range. Visible and long-wave infrared ranges are important for architectural glass. The article presents results of a study focused on the selection of convenient materials for thin reflective films and optimisation of their composition in coatings. Data from spectral measurements of transmittance and reflectance of selected types of architectural glass were compared with spectral characteristics of the designed coated glass simulated and optimised in the computer program FILM*CALC. The experimental vacuum deposition of the designed thin reflective coating on the glass substrate was carried out and spectrally measured. Apart from the spectral measurements the effect of the special glass reflectance was thermally evaluated in a testing box with the temperature sensor. Results from experiments, computer simulations and spectral measurements brought design recommendations for the optimised composition of thin infrared reflective coatings for window glazing applications. 相似文献
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过渡季节自然通风节能效果分析 总被引:1,自引:0,他引:1
外窗和透明玻璃幕墙的开启对建筑自然通风效果影响很大,借助数值模拟方法,在项目前期对主要公共空间的幕墙开启进行优化,得出过渡季节60%的时间可以通过自然通风满足公共空间室内热舒适要求,报告厅因建筑功能和使用上的特殊性,建议过渡季节采用全新风运行模式,提高室内舒适度的同时减少系统运行能耗. 相似文献