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魏超凡¹  ,  趙貴金¹  ,  張新杰²  ,  梁燕麗²

 

( 1 .  河北工程大學 土木工程學院 ，邯鄲 056038 ;

2.  中交城市能源研究設計院有限公司 河北分公司 ，石家莊 050000)

摘   要 ：為探究 GB 51022—2015 《門式剛架輕型房屋鋼結構技術規范》 與 《NF EN  1991 - 1 - 3 :  2004 -  General actions - Snow loads》中雪荷載規范對門式剛架結構的影響，通過規范參數對比及有限元建模 ，選取改變結構體系法和粘鋼法加固工程案例建立 Midas Gen 模型，對比驗證兩種規范下結構應力比、穩定性及撓度等力學 指標。結果表明：《中國規范》 雪荷載計算方法較為簡單，兩種規范部分參數與屋面積雪分布系數存在一定差異；有限元模型計算結果顯示，《中國規范》雪荷載值和力學參數計算結果普遍偏大，尤其在不均勻分布上呈現 更大保守性，而《歐洲規范》計算結果整體偏小。

關鍵詞： 門式剛架加固 ；雪荷載 ；《中國規范》；《歐洲規范》；有限元分析

中圖分類號：TU391            

文獻標志碼：A           

文章編號： 1005- 8249   (2025)  02- 0117- 07 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .02.020

 

WEI Chaofan1  ,  ZHAO Guijin1  ,  ZHANG Xinjie2 ,  LIANG Yanli2

(1 . School of Civil Engineering ,  Hebei University of Engineering ,  Handan 056038 ,  China;

2. Hebei Branch ,  CCCC Gas & Heat Research and Design Institute Co . ,  Ltd . ,  Shijiazhuang 050000 ,  China)

Abstract: In order to explore the influence of snow load specifications in the "Technical Specification for Steel Structures of Light duty Buildings with Gabled Frames" and "BS EN 1991-1-3:2003" on portal frame structures, this paper selects two reinforcement examples of portal frames located in Fengzhen, Inner Mongolia. The reinforcement design is carried out using the method of changing the structural system and the method of bonding steel, and the mechanical analysis is carried out using the specification parameters. The results indicate that the calculation method for snow load in China is relatively simple, and there are differences between the two standards in terms of uneven distribution of snow load on single span and double span double slope structures, as well as the snow distribution coefficient on the roof area; Using Midas Gen to establish a finite element model, comparing its stress ratio, stability, deflection and other parameters, the calculation results of Chinese standards are generally biased, especially in non-uniform distribution, which appears conservative; The overall result of the European standard calculation is relatively small.

Key words: reinforcement of portal frame; snow load; standardized comparison; finite element analysis；European standards

作者簡介：魏超凡  (1998—) ,  男 ，碩士研究生 ，研究方向： 結構工程。

收稿日期：2024 - 04 - 29