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    鄒  宇  石永久  王元清  李少甫
    (清華大學(xué)建筑玻璃與金屬結(jié)構(gòu)研究所  北京 100084)

[提要]  研究了點(diǎn)式支承玻璃結(jié)構(gòu)中帶金屬緊固件和墊層材料的圓形玻璃板的承載力問(wèn)題，分析了塑料墊層的彈性模量、厚度和緊固件的內(nèi)徑對(duì)有墊層的帶單緊固件圓形玻璃板有限元模型的應(yīng)力狀態(tài)和承載力的影響。研究結(jié)果表明：采用較大彈性模量的墊層，有利于提高玻璃板的承載力；墊層厚度對(duì)玻璃板的承載力影響很小，考慮到經(jīng)濟(jì)性和制造工藝要求，墊層最小厚度可取為Imm;采用內(nèi)徑較小的金屬緊固件，對(duì)提高玻璃板的承載力是不利的。如果確實(shí)需要采用內(nèi)徑較小的緊固件，則應(yīng)選取彈性模量較大、厚度較小的墊層。
[關(guān)鍵詞]  點(diǎn)式支承玻璃結(jié)構(gòu)  金屬連接件  緊固件  塑料墊層  承載性能

The paper deals with the bearing capacity of circular glass panels with metal fasteners and plastic layers in point-supporting glass structures. Influences of the elastic modulus and thickness of plastic layers and the inner diameter of the fastener on the stress state and capacity of circular glass-panel models with single metal fastener have been investigated. Results show that: adopting layers with large elastic modulus is helpful to enhance the loading capacity of glass boards; the thickness of layers has little effect on the loading capacity of glass boards, minimum thickness of layers can be Imm; adopting metal fasteners with small internal diameters is not helpful to enhance the loading capacity of glass boards. But thin layers with large modulus can be used when small-diameter fasteners are adopted.
Keywords: polnt-supporting glass structure; metal connector; fastener; plastic layer; loading property