本文選題：正交異性鋼橋面板 + 組合橋面板　； 參考：《西南交通大學》2016年碩士論文

【摘要】：為提升正交異性鋼橋面板的抗疲勞性能,國內外學者提出了大縱肋正交異性鋼橋面板,研究表明：相對于傳統的正交異性鋼橋面板,該結構在整體疲勞性能和經濟性等方面具有突出優(yōu)勢。但該類結構頂板與縱肋焊縫和縱肋腹板局部區(qū)域疲勞強度不足問題突出,進一步完善結構設計并改善上述控制部位的疲勞性能,是推動這一新型橋面板結構發(fā)展的基礎和關鍵。在大縱肋正交異性鋼橋面板上設置混凝土結構層,發(fā)展新型大縱肋正交異性鋼板—混凝土組合橋面板,是改善大縱肋正交異性鋼橋面板關鍵疲勞易損部位抗疲勞性能的有效途徑。對于該類結構的優(yōu)化設計問題及其在典型橋型中的適用性問題進行了研究。主要研究工作如下：(1)概述正交異性鋼橋面板發(fā)展歷程,簡述傳統正交異性鋼橋面板面臨的兩類難題,綜述了大縱肋正交異性鋼橋面板的優(yōu)勢和不足。在此基礎上闡述了新型大縱肋正交異性鋼板—混凝土組合橋面板的發(fā)展概況；(2)以典型的大縱肋正交異性鋼板—混凝土組合橋面板為研究對象,建立了其參數化有限元模型,分析了增設混凝土結構層在改善正交異性鋼橋面板局部應力集中、增大結構局部剛度方面的有效性。結果表明：組合結構體系能夠增加其橋面剛度,顯著降低正交異性鋼橋面板關鍵疲勞易損部位的應力水平；(3)確定了影響新型大縱肋正交異性鋼板—混凝土組合橋面板結構受力的主要設計參數,在此基礎上基于Kriging方法對兩類大縱肋組合橋面板的截面參數進行了優(yōu)化設計。研究結果表明,所提出的Kriging方法適用于大縱肋組合橋面板的結構優(yōu)化設計問題。(4)以所確定的新型大縱肋正交異性鋼板—混凝土組合橋面板優(yōu)化設計方案為研究對象,采用熱點應力法對于三類橋面板的疲勞性能進行了對比研究。研究結果表明：正交異性鋼橋面板與混凝土結構層組成的組合受力體系能夠顯著降低新型大縱肋正交異性鋼板—混凝土組合橋面板中鋼橋面板關鍵疲勞易損部位的應力幅,提高其疲勞壽命；(5)以港珠澳大橋深水區(qū)非通航孔標準聯連續(xù)鋼箱梁橋為工程背景,研究了新型大縱肋正交異性鋼板—混凝土組合橋面板在大跨度連續(xù)梁橋中的適用性問題。結果表明：新型大縱肋正交異性鋼板—混凝土組合橋面板在大跨度連續(xù)梁橋中具有良好的適用性。
[Abstract]:In order to improve the fatigue resistance of orthotropic steel bridge panels, domestic and foreign scholars put forward the orthotropic steel bridge panels with large longitudinal ribs. The results show that: compared with the traditional orthotropic steel bridge panels, The structure has outstanding advantages in overall fatigue performance and economy. However, the fatigue strength in the local region of the roof and longitudinal rib welds and webs of this kind of structures is insufficient, and it is the foundation and key to promote the development of this new bridge deck structure to further improve the structural design and improve the fatigue performance of the above control parts. A new type of orthotropic steel plate-concrete composite deck slab with large longitudinal rib is developed by placing concrete structure layer on the slab of orthotropic steel bridge with large longitudinal rib. It is an effective way to improve the fatigue resistance of the key fatigue vulnerable parts of orthotropic steel bridge panel with large longitudinal rib. The optimization design problem of this kind of structure and its applicability in typical bridge type are studied. The main research work is as follows: (1) the development course of orthotropic steel bridge panel is summarized, two kinds of difficult problems facing orthotropic steel bridge face plate are briefly described, and the advantages and disadvantages of orthotropic steel bridge face slab with large longitudinal rib are summarized. On this basis, the development of new type orthotropic steel plate-concrete composite deck slabs with large longitudinal ribs is described. (2) taking the typical orthotropic steel plate-concrete composite deck slabs with large longitudinal ribs as the research object, the parametric finite element model is established. The effectiveness of adding concrete layer in improving local stress concentration and increasing local stiffness of orthotropic steel bridge slab is analyzed. The results show that the composite structure system can increase the stiffness of the bridge deck and reduce the stress level of the key fatigue vulnerable parts of the orthotropic steel bridge panel. (3) the main design parameters affecting the stress of a new type of orthotropic steel plate concrete composite deck slab with large longitudinal ribs are determined. Based on the Kriging method, the cross-section parameters of two kinds of large longitudinal rib composite deck slabs are optimized. The results show that the proposed Kriging method is suitable for the structural optimization design of large longitudinal rib composite deck slabs. (4) A new type of orthotropic steel-concrete composite deck slab with large longitudinal ribs is chosen as the research object. The fatigue behavior of three kinds of bridge slabs is studied by means of hot spot stress method. The results show that the combined stress system composed of orthotropic steel deck slab and concrete structure layer can significantly reduce the stress amplitude of the key fatigue vulnerable parts of steel bridge slab in the new type of orthotropic steel plate concrete composite deck slab with large longitudinal ribs. (5) taking the non-navigable hole standard combined continuous steel box girder bridge in the deep water area of HongKong-Zhuhai-Macao Bridge as the engineering background, the applicability of a new type of large longitudinal rib orthotropic steel-concrete composite deck slab in the long-span continuous beam bridge is studied. The results show that the new type of orthotropic steel plate and concrete composite deck slab with large longitudinal ribs has good applicability in long span continuous beam bridges.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：U443.31

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