發(fā)布時間：2018-09-04 05:58

【摘要】：波形鋼腹板PC箱梁橋是一種新的橋梁結(jié)構(gòu)。它由混凝土頂?shù)装�、體外預應力鋼筋與波紋鋼腹板三者構(gòu)成的鋼一混凝土組合結(jié)構(gòu)。這種結(jié)構(gòu)恰當?shù)貙⒉y鋼、混凝土結(jié)合起來,減少自重,充分發(fā)揮了各種材料的性能,且造型美觀、施工方便。本文分析了波形鋼腹板PC箱梁的結(jié)構(gòu)構(gòu)造及施工特點,對波形鋼腹板PC箱梁的抗彎、抗扭、穩(wěn)定性及軸向變形等特性進行了研究。給出了波形鋼腹板PC箱梁橋的設計理論、計算方法,包括概念設計、主梁截面計算、波形鋼腹板計算、預應力鋼筋設計等。并將設計理論及方法應用于試驗橋的設計實踐。本文對試驗橋采用ANSYS有限元仿真計算軟件及GQJS平面桿系計算軟件進行分析計算,研究了主梁各構(gòu)件的受力狀況。重點計算了各種工況下的主梁頂?shù)装宓恼龖�、鋼腹板的剪應力及主梁的變形特征。并驗算了承載能力極限狀態(tài)主梁正截面抗彎強度,鋼腹板剪切強度等。為對試驗橋進行了試驗研究,施工過程中在主梁兩處斷面布置了應力及變形測試點,監(jiān)測了各階段主梁頂?shù)装寮案拱宓膽?shù)據(jù)。通過對比監(jiān)測數(shù)據(jù)與理論計算數(shù)據(jù),驗證了理論計算可靠性及設計的合理性。同時通過試驗橋的研究,進一步完善了設計理論。
[Abstract]:PC box girder bridge with corrugated steel webs is a new bridge structure. It is a steel-concrete composite structure composed of concrete top and bottom slab, external prestressed steel bar and corrugated steel web plate. This kind of structure combines corrugated steel and concrete properly, reduces the weight of the body, gives full play to the performance of all kinds of materials, and its shape is beautiful and the construction is convenient. In this paper, the structural structure and construction characteristics of the corrugated steel web PC box girder are analyzed, and the bending, torsion, stability and axial deformation of the corrugated steel web PC box girder are studied. The design theory and calculation method of PC box girder bridge with corrugated steel webs are presented, including conceptual design, section calculation of main beam, calculation of corrugated steel web plate, design of prestressed steel bar, etc. The design theory and method are applied to the design practice of the test bridge. In this paper, the finite element simulation software of ANSYS and the software of GQJS plane bar system are used to analyze and calculate the test bridge, and the stress condition of each member of the main beam is studied. The normal stress of the top and bottom plate of the main beam, the shear stress of the steel web plate and the deformation characteristics of the main beam are calculated. The flexural strength of normal section and shear strength of steel web are calculated. In order to study the test bridge, the stress and deformation test points were arranged in two sections of the main girder during the construction process, and the stress data of the top and bottom plates and web plates of the main girder were monitored. The reliability of the theoretical calculation and the rationality of the design are verified by comparing the monitoring data with the theoretical calculation data. At the same time, through the research of the experimental bridge, the design theory is further improved.
【學位授予單位】：廣西大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U448.216

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相關期刊論文 前1條

1 劉磊,錢冬生;波紋鋼腹板預應力結(jié)合梁橋[J];國外公路;1999年01期

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本文編號：2221218