本文關(guān)鍵詞：C匝道簡支鋼箱梁橋的力學(xué)性能分析　出處：《燕山大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 曲線鋼箱梁橋 有限單元法 靜動力分析 爆炸響應(yīng)

【摘要】：隨著公路交通運輸?shù)难杆侔l(fā)展,曲線鋼箱梁橋在現(xiàn)代交通中應(yīng)用越來越廣泛。因為匝道上布置橋梁墩位時要充分考慮到所跨越的橋梁和地面道路系統(tǒng),并留出現(xiàn)有和規(guī)劃的公共設(shè)施位置,所以通常選擇曲線鋼箱梁橋。鋼箱梁是典型的空間薄壁結(jié)構(gòu),彎扭耦合作用使得其即使在恒載作用下的應(yīng)力分布也比較復(fù)雜,因此必須按照設(shè)計規(guī)范對其力學(xué)性能進行仿真分析。首先本論文采用有限元軟件ANSYS Workbench和ANSYS/LS-DYNA,對昆明南連線高速公路40米C匝道鋼箱梁橋進行了數(shù)值仿真。根據(jù)設(shè)計圖紙建立了整橋的有限元模型,按照公路橋涵設(shè)計通用規(guī)范,確定了荷載。通過靜力分析得到了整橋應(yīng)力分布及不同工況下的最不利位置。其次通過自振特性分析得到了該橋的固有頻率和振型,驗證其是否滿足規(guī)范,為其動力學(xué)分析和克服共振和有害振動提供了基礎(chǔ)。最后是用ANSYS有限元軟件采用板殼單元建模,利用非線性有限元軟件ANSYS/LS-DYNA采用ALE多物質(zhì)流固耦合算法對該橋做爆炸模擬,得出不同量的炸藥對該橋的同一位置和同種爆炸量在不同高度響應(yīng),本文進行了對比分析,研究其對鋼箱梁橋破壞程度的影響和破壞機理。本文對C匝道簡支鋼箱梁橋的分析計算獲得的結(jié)論將對于同類型橋梁設(shè)計具有一定的理論意義和工程實際應(yīng)用價值。
[Abstract]:With the rapid development of highway transportation, curved steel box girder bridges are more and more widely used in modern traffic. Because of the location of public facilities, curved steel box girder bridge is usually chosen. The steel box girder is a typical thin-walled space structure. The coupling of bending and torsion makes the stress distribution more complicated even under dead load. Therefore, the mechanical properties must be simulated and analyzed according to the design specification. Firstly, the finite element software ANSYS Workbench and ANSYS/LS-DYNA are used in this paper. The numerical simulation of 40m C ramp steel box girder bridge of Kunming South Link Expressway is carried out. According to the design drawings, the finite element model of the whole bridge is established, and the general specification for the design of highway bridge and culvert is established. Through static analysis, the stress distribution of the whole bridge and the most unfavorable position under different working conditions are obtained. Secondly, the natural frequency and vibration mode of the bridge are obtained by the analysis of the natural vibration characteristics to verify whether the bridge meets the specifications. It provides a foundation for dynamic analysis and overcoming resonance and harmful vibration. Finally, the finite element model of plate and shell is used in ANSYS software. The nonlinear finite element software ANSYS/LS-DYNA is used to simulate the explosion of the bridge using ALE multi-material fluid-solid coupling algorithm. It is concluded that the same position of the bridge and the same amount of explosive at different heights are responding to different quantities of explosives, and the comparison and analysis are carried out in this paper. The analysis and calculation of C ramp simply supported steel box girder bridge will have certain theoretical significance and practical application value for the design of the same type of bridge. Value.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U441;U448.213

【參考文獻】

相關(guān)期刊論文 前2條

1 朱新明;蔣志剛;白志海;;交通恐怖襲擊特點及反恐措施研究[J];國防交通工程與技術(shù);2011年01期

2 鄧榮兵;金先龍;陳向東;杜新光;沈建奇;李政;;爆炸沖擊波作用下橋梁損傷效應(yīng)的數(shù)值仿真[J];上海交通大學(xué)學(xué)報;2008年11期

相關(guān)碩士學(xué)位論文 前3條

1 白志海;正交異性鋼橋面板恐怖爆炸破壞機理研究[D];國防科學(xué)技術(shù)大學(xué);2010年

2 黃東;曲線鋼箱梁的有限元仿真分析研究[D];西南交通大學(xué);2005年

3 趙耀;廈門BRT曲線鋼箱梁結(jié)構(gòu)行為計算分析[D];西南交通大學(xué);2010年

，

本文編號：1403609