摘要
针对真空玻璃在工程应用中的强度设计关键问题,分析均布载荷下真空玻璃的弯曲失效特性及影响因素。通过试验验证,真空玻璃板最大应力分布在中心部位,其应力分布特征可按四边简支理论计算。根据试验结果,给出风载荷作用下真空玻璃的强度设计计算公式及持久应力作用下玻璃的强度设计值。研究结果表明:真空玻璃内外片变形一致,2片玻璃承载比例按其刚度分配,当2片玻璃厚度相同时,其抗外力强度最大;由于真空玻璃存在非均匀内应力,其承载能力约相当于同等厚度普通玻璃的85%;设计真空玻璃承载强度时,必须考虑其表面附加张应力的影响。
The strength behavior of the vacuum glazing and influencing factors were investigated by using uniform load test on the glass plate.Based on the test results and stresses distribution characteristics in vacuum glazing,and considering the influence of the additional supporting stress,the calculation formula of resistance to wind load and strength design factors of the glass under preexisting tension stress function were given.The results show that the deformation of the outer and inner panel of the vacuum glass is identical,and the load distribution on the two glass panels are proportional to the stiffness of the glass panel.For a given total thickness of the two glass panels,the strength reaches the highest when both glass panels have the identical thickness.The capacity of resisting wind load of the vacuum glazing is the same as a common glass whose thickness is about 85% of the total thickness of the vacuum glazing.The preexisting tension stress in the outer-side surface of the vacuum glazing,which affects the strength of the vacuum glazing,should be taken into account in strength design.The maximum stress in the vacuum glazing is at the centre of the glass plate under uniform load.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第2期349-355,共7页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(50672093,50772103)
北京市自然科学基金资助项目(2082026)
北京市科委项目(D08050303450803)
国家高技术研究发展计划(“863”计划)项目(2007AA03Z526)
关键词
真空玻璃
承载特性
支撑应力
持久应力
强度设计
vacuum glazing
bearing behavior
supporting stress
lasting stress
strength design
