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    陳  亦   馬  星   王肇民
   （濟(jì)大學(xué)建筑工程系  上海 200092）

[提要]  法蘭盤是鋼管結(jié)構(gòu)常見的連接形式，目前常用的加勁肋法蘭盤連接施工復(fù)雜，影響結(jié)構(gòu)外型美觀。采用無肋法蘭盤連接，在一定程度上彌補(bǔ)了上述不足?；诹W(xué)原理，導(dǎo)出無肋法蘭盤的計(jì)算公式，并通過有限元法和試驗(yàn)加以驗(yàn)證。在分析過程中，考慮了螺栓對(duì)法蘭盤的加勁作用，并給出該類節(jié)點(diǎn)的使用范圍。工程實(shí)例表明，采用無肋法蘭盤連接形式，可以簡(jiǎn)化施工，節(jié)約鋼材。
[關(guān)鍵詞]  鋼管結(jié)構(gòu)  法蘭盤  加勁肋  節(jié)點(diǎn)

Flanges are common in steel tube structures. Flanges with stiffening ribs usually used, whose construction is complicated, will influence the outlook of the structure. The flanges without stiffening ribs make up the shortcoming to some extend. On the basis of mechanical theory, the design formula for flange without stiffening ribs is developed and proved through the Finite Element Method and test. During the process of analysis, concerning the stiffening action on the flanges by bolts,the application range of the joint isgiven. The adoption of flanges without stiffening ribs in real project, will not only simplify construction, but also economize steel material.
Keywords:  steel tube; flanges; stiffening ribs; joint