- 摘 要
-
(浙江杭蕭鋼構股份有限公司，杭州 310003)
［摘要］就《門式剛架輕型房屋鋼結構技術規(guī)程》(CECS102：2002)的應用提出以下設計計算中的問題及其解決方法：冷彎薄壁型鋼檁條的強度驗算公式引用現(xiàn)行規(guī)范GB50018—2002，沒有考慮蒙皮效應的影響，而風吸力作用下整體穩(wěn)定驗算公式引用歐共體規(guī)范EC3的計算模式，考慮了蒙皮效應的影響，在少設拉條的情況下會得到悖理的計算結果，這兩者的計算公式應統(tǒng)一配套考慮蒙皮效應的作用；在計算有效截面時，冷彎薄壁型鋼構件卷邊翼緣的屈曲系數(shù)取值偏小，應根據(jù)卷邊的相對剛度加以提高可得到更合理的、較大一些的有效截面；隅撐-檁條能否作為屋面梁平面外完全的支承條件取決兩者的相對剛度，通過計算隅撐-檁條體系下主構件的臨界彎矩可得到屋面梁平面外合理的計算長度。
［關鍵詞］門式剛架；冷彎薄壁型鋼構件；屈曲系數(shù)；有效截面；隅撐
Three problems and suggestions of the design on the specification CECS102：2002
Chen Youquan, Wang Lei (Zhejiang Hangxiao Steel Structure Co., Ltd.,
Abstract: The problems and suggestions of the design based on the specification CECS102: 2002 were put forward. Firstly, the strength checking of cold formed purlin without diaphragm effect according to present code GB50018—2002 is in contradiction with its buckling checking by wind uplift with diaphragm effect according to Europen community code EC3, which should be unified by diaphragm effect. Secondly, when calculating effective sections, the buckling coefficient of cold formed lipped flange is somewhat too small and should be increased to get a more reasonable and more large effective sections according to the lip rigidity. At last, the full bracing conditions of rafter beam buckli
