钢结构
鋼結構
강결구
Steel Construction
2015年
10期
98-102
,共5页
顶推%钢箱梁%局部屈曲分析%仿真分析
頂推%鋼箱樑%跼部屈麯分析%倣真分析
정추%강상량%국부굴곡분석%방진분석
incremental launching%steel box beam%local buckling analysis%simulation analysis
以某钢箱梁顶推为工程依托,针对顶推过程中由于临时支架、钢箱梁本身线型误差、以及钢箱梁在吊装、焊接过程中的施工误差,导致箱梁与滑板之间的面接触变为点接触,甚至出现脱空的现象,致使支反力重分布,进而导致局部屈曲。采用三维精细有限元板壳模型模拟钢箱梁顶推施工过程,建立精细局部模型对支点处局部屈曲状态进行仿真分析,并建议在通过滑道的底板上增加平行及垂直于腹板的加劲肋。该建议被采纳实施后,取得了良好的施工效果,可供同类工程项目借鉴。
以某鋼箱樑頂推為工程依託,針對頂推過程中由于臨時支架、鋼箱樑本身線型誤差、以及鋼箱樑在弔裝、銲接過程中的施工誤差,導緻箱樑與滑闆之間的麵接觸變為點接觸,甚至齣現脫空的現象,緻使支反力重分佈,進而導緻跼部屈麯。採用三維精細有限元闆殼模型模擬鋼箱樑頂推施工過程,建立精細跼部模型對支點處跼部屈麯狀態進行倣真分析,併建議在通過滑道的底闆上增加平行及垂直于腹闆的加勁肋。該建議被採納實施後,取得瞭良好的施工效果,可供同類工程項目藉鑒。
이모강상량정추위공정의탁,침대정추과정중유우림시지가、강상량본신선형오차、이급강상량재조장、한접과정중적시공오차,도치상량여활판지간적면접촉변위점접촉,심지출현탈공적현상,치사지반력중분포,진이도치국부굴곡。채용삼유정세유한원판각모형모의강상량정추시공과정,건립정세국부모형대지점처국부굴곡상태진행방진분석,병건의재통과활도적저판상증가평행급수직우복판적가경륵。해건의피채납실시후,취득료량호적시공효과,가공동류공정항목차감。
ABSTRACT:Taking the project of incremental launching engineering of a steel box beam as an example,the surface contact turn into the point contact between the box beam and slid beam even separates which lead to reaction force redistribution and local buckling because of temporary supports,linear error of steel box beam,and construction error in steel box beam lifting and welding in the process of incremental launching.The shell models of 3D finite elements have been taken to simulate the process of incremental launching for steel box beam,and the local buckling state of incremental launching engineering of steel box beam was simulated and analyzed by a fine partial model,the suggestion about adding the parallel stiffeners and stiffeners perpendicular to the web on bottom plate of the slide was proposed.The proposed suggestion has been adopted by the owners and construction units,and achieved good results in construction,which could provide theoretical and practical learning experience for similar projects.