本文選題：波紋鋼腹板組合箱梁 + 剪力滯效應��； 參考：《蘭州交通大學》2015年碩士論文

【摘要】：由不同材料結構或是不同施工工序所結合而成的梁可以稱為組合梁結構。本文的組合梁結構是一種較為特殊的組合結構,是由鋼腹板設計為波紋狀形式的組合鋼混箱梁結構。這種箱梁截面形式的特殊結構在整體的受力性能以及輕盈的結構形式方面,比起普通的混凝土箱梁有很大程度上的優(yōu)越性。文章結合國內外的文獻以及本文為試驗而打造的模型試驗梁,以此試驗梁為依托進行此特殊結構箱梁的剪力滯效應研究,再從理論計算和有限元仿真模擬方面進行分析與對比,最后再將有限元建模步驟及形式進一步更深入的精細化,具體的工作內容如下:(1)運用理論分析,結合能量變分法,應用此類波紋鋼腹板箱梁形式的剪力滯效應理論公式,得出簡支約束條件下的不同荷載形式所對應的剪力滯系數(shù)求解公式。其次進行試驗梁的實測數(shù)據(jù)采集,最后總結歸納。最后再應用有限元分析軟件MIDAS/FEA進行試驗梁模型的仿真模擬。將三者總結歸納后的剪力滯系數(shù)值進行對比分析,從而驗證三者的分析準確度。(2)在有限元建模的基礎上對此進行進一步精細化建模。從三個精細化方面入手:○1連接形式精細化(波紋鋼腹板未嵌入形式建立和波紋鋼腹板嵌入形式建立);○2鋼腹板單元建立精細化(鋼腹板實體單元建立和鋼腹板板殼單元建立);○3鋼腹板波紋形狀的精細化(鋼腹板波紋狀折角建立和鋼腹板波紋狀圓角建立)。討論這三種建模方式的操作步驟的簡潔性以及所得數(shù)據(jù)的精確性,最終總結出即滿足工程計算需求精度又簡化建模步驟的實用的建模方式。
[Abstract]:A beam composed of different material structures or different construction procedures can be called composite beam structure. The composite beam structure in this paper is a special kind of composite structure which is designed from steel webs to corrugated composite steel-concrete box girder structure. The special structure of this type of box girder is superior to the ordinary concrete box girder in terms of its overall mechanical performance and light structure. In this paper, the shear lag effect of the box girder with special structure is studied based on the domestic and foreign literature and the model test beam made for the test, and then the theoretical calculation and the finite element simulation are analyzed and compared. Finally, the steps and forms of finite element modeling are further refined. The specific work contents are as follows: 1) using the theoretical analysis and the energy variational method, the shear lag effect theoretical formula of this corrugated steel web box girder is applied. The formula of shear lag coefficient corresponding to different load forms under simply supported constraints is obtained. Secondly, the measured data of the test beam are collected, and finally summarized. Finally, the finite element analysis software MIDAS/FEA is used to simulate the test beam model. By comparing and analyzing the three values of shear lag coefficient, the accuracy of the three methods is verified. (2) on the basis of finite element modeling, the model is further refined. Starting from three fine aspects, the connection form of: 01 is refined (the corrugated steel web is not embedded and the corrugated steel web is embedded in the form of the wavy steel web and the steel web unit is built up with the refinement of the steel web entity unit and the steel web unit). The web plate shell element is used to establish the refined corrugated shape of the steel web (the corrugated angle of the steel web and the corrugated circular angle of the steel web). This paper discusses the simplicity of the operation steps and the accuracy of the data obtained from these three modeling methods, and finally summarizes a practical modeling method which not only meets the requirements of engineering calculation but also simplifies the modeling steps.
【學位授予單位】：蘭州交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U441

【參考文獻】

相關期刊論文 前1條

1 吳幼明;岳珠峰;呂震宙;;薄壁曲線箱梁剪力滯計算的有限段方法[J];物理學報;2009年06期

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本文編號：1813894