節(jié)點域斜加勁肋設計計算方法
劉高波1），許嶸2），顧強3）
- 摘 要
-
1)西安建筑科技大學土木工程學院，710055； 2)中國建筑西北設計研究院， 西安,710003； 3)蘇州科技學院土木工程系，215011。［提要］我國現(xiàn)行鋼結構設計規(guī)范與規(guī)程對梁柱節(jié)點域的抗剪能力提出了具體的要求，并指出當節(jié)點域抗剪能力不足時可設置斜向加勁肋。但是卻沒有給出所設置的斜加勁肋的計算辦法。采用有限單元法對考慮了斜肋板寬厚比、腹板寬厚比、節(jié)點域高寬比、柱翼緣寬厚比等多種影響因素的節(jié)點域模型進行了屈曲后強度計算，分析了各種不同情況下的節(jié)點域的變形及應力分布，提出了有斜加勁肋的節(jié)點域的等效計算模型及計算公式，并推導了門式剛架節(jié)點域斜加勁肋的設計計算公式。［關鍵詞］節(jié)點域；斜加勁肋；屈曲后強度；有限單元法Performance and Design of Inclined Stiffener in Panel Zone/Liu Gaobo1，Xu Rong2，Gu Qiang3(1 Dept. of Civil Engineering, Xi"an University of Architecture & Technology,Xi"an 710055,China; 2 China Northwest Building Design and Research Institute,Xi"an 710003,China; 3 Dept. of Civil Engineering, USTS, Suzhou 215011,China)Abstract:The codes and specifications of China in steel structure field require that the bearing ability of shear force in panel zone must be sufficient and the inclined stiffener should be applied. But all of the criterions have no formula on how to design the inclined stiffener and the panel zone with inclined stiffener.The post buckling behaviors of panel zone with inclined stiffener models,which concern different geometric factors, are analyzed by finite element analysis. An equal model of penal zone with inclined stiffener is found, with which design formula of panel zone with inclined stiffener and the inclined stiffener in gabled frames established.Keywords:panel zone; inclined stiffener; post buckling strength; finite element analysis method
