本文選題：穩(wěn)定型懸索橋　切入點：橋面桿系　出處：《昆明理工大學》2017年碩士論文

【摘要】：穩(wěn)定型懸索橋由于增加反張拉結(jié)構(gòu),整個橋處于預張狀態(tài),整體剛度隨之增加,致使橋的穩(wěn)定性大幅度增加。橋面系的設(shè)計可以不像普通懸索橋那樣通過增加橋的重量來獲得橋的重力剛度,而是只需要滿足橋面上作用靜載和動載作用時的剛度及強度即可。因此,橋面結(jié)構(gòu)可以設(shè)計得更加輕和薄,以發(fā)揮材料作用和降低造價。論文將對橋面系的構(gòu)成及其力學性能進行研究,對不同結(jié)構(gòu)形式進行對比分析,優(yōu)化出較好的結(jié)構(gòu)形式和布局。主要研究工作及成果如下:1.對穩(wěn)定型懸索橋中的橋梁的型式和結(jié)構(gòu)參數(shù)作歸納和統(tǒng)計分析,分析可選型式的特點。闡述橋梁的構(gòu)造特點和構(gòu)造型式。對照原設(shè)計的常規(guī)工字形橋梁及混凝土橋面方案,設(shè)計截面為方形的箱型梁作為加勁梁的方案,創(chuàng)新之處在于運用箱型梁將兩端封口,形成封口箱型梁作為加勁梁的另一種方案。2.分析研究懸索橋的相關(guān)理論,擬選擇大型通用有限元軟件ANSYS作為結(jié)構(gòu)分析軟件。在求解過程中可從多方面入手,建立橋面桿系計算模型。在此之前先對開口梁、閉口梁和封口梁進行研究,找到力學性能較好的截面形式。再將其應(yīng)用于穩(wěn)定型懸索橋的力學分析當中。3.根據(jù)橋面的受載情況,設(shè)計三種橋面系結(jié)構(gòu),并應(yīng)用有限元法對三種形式的結(jié)構(gòu)進行靜力狀態(tài)下的強度和剛度分析,尤其對扭轉(zhuǎn)時的剛度分析。初選力學性能較優(yōu)的橋面結(jié)構(gòu)形式。4.建立穩(wěn)定型懸索橋的有限元模型�？紤]橋的幾何非線性特性,在三種橋面系置于全橋系統(tǒng)中的情況下對橋在最不利靜載荷作用時側(cè)向變形和扭轉(zhuǎn)變形進行研究。以改善整體結(jié)構(gòu)性能為準確定橋面系的結(jié)構(gòu)形式。5.計算橋的固有特性,和已有的結(jié)果作對比,研究橋面系的改變對橋固有特性的影響。通過以上幾個方面找出最適合穩(wěn)定型懸索橋的加勁梁類型,從而可對穩(wěn)定性懸索橋進行進一步的優(yōu)化。通過對靜力特性、結(jié)構(gòu)特性與動力特性的對比,找出穩(wěn)定型懸索橋的優(yōu)化模型。
[Abstract]:The stability of the stable suspension bridge is greatly increased because of the increase of the reverse tension structure, the pretension state of the whole bridge and the increase of the overall stiffness.The design of deck system can not increase the weight of the bridge to obtain the gravity stiffness of the bridge, but only satisfy the stiffness and strength of the static and dynamic loads on the deck.Therefore, the bridge deck structure can be designed lighter and thinner to play the role of material and reduce the cost.In this paper, the structure and mechanical properties of the bridge deck system are studied, and the different structural forms are compared and analyzed to optimize the structure and layout of the bridge deck system.The main research work and results are as follows: 1.The types and structural parameters of the bridges in a stable suspension bridge are summarized and statistically analyzed, and the characteristics of the optional types are analyzed.The structural characteristics and types of bridges are expounded.Compared with the conventional I-shaped bridge and concrete deck scheme, the box beam with square section is designed as stiffening beam. The innovation lies in the use of box beam to seal the two ends of the bridge.Form sealed box beam as another scheme of stiffening beam. 2.In this paper, the theory of suspension bridge is analyzed, and a large general finite element software, ANSYS, is chosen as the structure analysis software.In the process of solution, the calculation model of bridge deck bar system can be established from many aspects.Then it is applied to the mechanical analysis of the stable suspension bridge.According to the loading condition of the bridge deck, three kinds of deck structures are designed, and the strength and stiffness of the three kinds of structures under static state are analyzed by using the finite element method, especially the stiffness analysis in torsion.The bridge deck structure with better mechanical properties. 4.The finite element model of stable suspension bridge is established.Considering the geometric nonlinearity of the bridge, the lateral and torsional deformation of the bridge under the most unfavorable static load is studied under the condition that three deck systems are placed in the whole bridge system.The structural form of bridge deck system is determined by improving the overall structural performance.The natural characteristics of the bridge are calculated and compared with the existing results, and the influence of the bridge deck system on the natural characteristics of the bridge is studied.Through the above several aspects, the type of stiffened beam which is most suitable for stable suspension bridge can be found out, so that the stability suspension bridge can be further optimized.Through the comparison of static, structural and dynamic characteristics, the optimization model of stable suspension bridge is found.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U448.25

【參考文獻】

相關(guān)期刊論文 前10條

1 鄭憲政;;懸索橋結(jié)構(gòu)分析的有限位移理論[J];橋梁建設(shè);1995年01期

2 傅強;懸索橋空間非線性分析[J];橋梁建設(shè);1998年01期

3 屈本寧,劉北辰;索-梁混合有限元模式及其在索橋分析中的應(yīng)用[J];計算結(jié)構(gòu)力學及其應(yīng)用;1990年04期

4 屈本寧,何天淳;穩(wěn)定型懸索橋與普通懸索橋固有振動對比研究[J];空間結(jié)構(gòu);1999年04期

5 屈本寧;劉北辰;;索橋在沖擊載荷作用下的動態(tài)響應(yīng)[J];昆明工學院學報;1992年02期

6 楊江波;;舊金山的金門大橋[J];人民文摘;2009年12期

7 宋暉;孟凡超;;舟山西堠門大橋關(guān)鍵技術(shù)介紹[J];公路;2009年05期

8 胡意立;孫明禮;沈燕青;周佳杰;胡林強;;ANSYS軟件中施加扭矩的方法[J];機械工程師;2010年11期

9 楊大林;;大跨懸索橋模態(tài)分析[J];公路交通科技(應(yīng)用技術(shù)版);2014年12期

10 何海榮;;對工字形截面鋼梁約束扭轉(zhuǎn)時的應(yīng)力分析[J];江蘇建筑;2014年04期

相關(guān)碩士學位論文 前8條

1 潘嵩崧;大跨度穩(wěn)定型懸索橋力學特性研究[D];昆明理工大學;2016年

2 耿夢溪;穩(wěn)定型懸索橋成形優(yōu)化分析[D];昆明理工大學;2014年

3 王曉春;車輛與穩(wěn)定型懸索橋的耦合動力分析[D];昆明理工大學;2014年

4 黃坤;穩(wěn)定型懸索橋力學控制微分方程研究[D];昆明理工大學;2007年

5 鄭玉國;基于優(yōu)化理論的穩(wěn)定型懸索橋有限元分析[D];昆明理工大學;2006年

6 尹永青;薄壁桿件約束扭轉(zhuǎn)分析[D];太原理工大學;2005年

7 孫華安;穩(wěn)定型懸索橋錨固系統(tǒng)設(shè)計研究及數(shù)值模擬[D];昆明理工大學;2005年

8 張煥;基于有限位移理論的懸索橋纜索體系分析[D];武漢理工大學;2004年

，

本文編號：1727643