曲線寬箱梁橋梁格模型建立與受力分析
發(fā)布時間：2019-04-13 21:49
【摘要】：由于近年來高等級公路及城市立交橋的修建,而在這些高等級公路的平面設(shè)計中,為了盡可能滿足車輛行駛的安全舒適,以使駕駛?cè)藛T的視覺和心理反應(yīng)能力保持線性的連續(xù)性,所以越來越多的曲線橋被廣泛采用。隨著交通量的增大,曲線寬箱梁橋所占的比例越來越重,針對曲線寬箱梁橋的研究也越來越多。相對而言,曲線寬箱梁橋是一種比較復(fù)雜的橋型,傳統(tǒng)的方法或者模型已經(jīng)不再適用,亟需新的方法或模型來解決曲線寬箱梁的計算問題�；趥鹘y(tǒng)梁格法、有限單元法及比擬正交異性曲板法,本文作者提出一種新的模型建立方法,即改進(jìn)梁格法有限元模型。 本文介紹了傳統(tǒng)梁格法和改進(jìn)梁格法縱向構(gòu)件與橫向構(gòu)件的劃分原則及方法,并介紹了兩種不同梁格法截面特性值的計算。將T梁的比擬正交異性曲板法推廣到寬箱梁的比擬正交異性曲板法。 針對有機(jī)玻璃曲線寬箱梁橋梁模型,利用有限元軟件MIDAS/CIVIL建立傳統(tǒng)梁格法有限元模型、改進(jìn)梁格法有限元模型及板單元有限元模型。通過三種有限元模型計算出來的支座反力值、撓度值以及內(nèi)力值的對比分析,總結(jié)出改進(jìn)梁格法的優(yōu)越性與存在的不足之處。 以在建的杭瑞國家高速公路湖南省臨湘大界至岳陽段(大岳高速)的君山互通主線橋所接的A匝道第一聯(lián)曲線寬箱梁橋為工程依托,根據(jù)改進(jìn)梁格法建立設(shè)置橫坡縱坡、不設(shè)置橫坡設(shè)置縱坡、不設(shè)置縱坡設(shè)置橫坡、不設(shè)置橫坡縱坡四種不同的有限元模型,分析了曲線寬箱梁橋的縱坡和橫坡的影響。 通過A匝道第一聯(lián)曲線寬箱梁橋徑向布置3個支座和布置4個支座的支座反力對比分析,建議將原橋徑向布置3個支座改為布置4個,使支座能夠得到更加有效的利用。
[Abstract]:As a result of the construction of high-grade highways and urban overpasses in recent years, in the graphic design of these high-grade highways, in order to meet the safety and comfort of vehicles as far as possible, In order to keep linear continuity of visual and psychological reaction ability, more and more curved bridges are widely used. With the increase of traffic volume, the proportion of curved wide box girder bridges becomes more and more heavy, and more research has been done on curved wide box girder bridges. Relatively speaking, the curved wide box girder bridge is a kind of complex bridge type. The traditional method or model is no longer applicable. It is urgent to solve the calculation problem of curved wide box girder by new method or model. Based on the traditional beam lattice method, finite element method and comparable orthotropic curved plate method, this paper presents a new modeling method, that is, the improved beam lattice method. This paper introduces the principle and method of dividing the longitudinal member and the transverse member of the traditional beam grid method and the improved beam grid method, and introduces the calculation of the characteristic values of two different beam grid methods. The analogy orthotropic curved plate method of T beam is extended to the analogy orthotropic curved plate method of wide box girder. Aiming at the bridge model of plexiglass curved wide box girder, the traditional finite element model of beam lattice method is established by using the finite element software MIDAS/CIVIL, and the finite element model of beam lattice method and plate element is improved. The advantages and disadvantages of the improved beam lattice method are summarized through the comparative analysis of the support reaction value, deflection value and internal force value calculated by three kinds of finite element models. Based on the A-ramp first curve wide box girder bridge connected by the Junshan interworking main line bridge between Linxiang Dajie and Yueyang section of Hunan Province (Danyue Expressway) under construction, based on the improved Liang's method, the transverse slope and longitudinal slope are set up. The influence of longitudinal slope and transverse slope of curved wide box girder bridge is analyzed by four different finite element models without setting horizontal slope, setting longitudinal slope and setting transverse slope. Based on the contrastive analysis of three supports and four supports in radial arrangement of the first curved wide box girder bridge on ramp A, it is suggested that the radial arrangement of three supports of the original bridge should be changed to four, so that the supports can be used more effectively.
【學(xué)位授予單位】：中南林業(yè)科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U448.213
本文編號：2457974
[Abstract]:As a result of the construction of high-grade highways and urban overpasses in recent years, in the graphic design of these high-grade highways, in order to meet the safety and comfort of vehicles as far as possible, In order to keep linear continuity of visual and psychological reaction ability, more and more curved bridges are widely used. With the increase of traffic volume, the proportion of curved wide box girder bridges becomes more and more heavy, and more research has been done on curved wide box girder bridges. Relatively speaking, the curved wide box girder bridge is a kind of complex bridge type. The traditional method or model is no longer applicable. It is urgent to solve the calculation problem of curved wide box girder by new method or model. Based on the traditional beam lattice method, finite element method and comparable orthotropic curved plate method, this paper presents a new modeling method, that is, the improved beam lattice method. This paper introduces the principle and method of dividing the longitudinal member and the transverse member of the traditional beam grid method and the improved beam grid method, and introduces the calculation of the characteristic values of two different beam grid methods. The analogy orthotropic curved plate method of T beam is extended to the analogy orthotropic curved plate method of wide box girder. Aiming at the bridge model of plexiglass curved wide box girder, the traditional finite element model of beam lattice method is established by using the finite element software MIDAS/CIVIL, and the finite element model of beam lattice method and plate element is improved. The advantages and disadvantages of the improved beam lattice method are summarized through the comparative analysis of the support reaction value, deflection value and internal force value calculated by three kinds of finite element models. Based on the A-ramp first curve wide box girder bridge connected by the Junshan interworking main line bridge between Linxiang Dajie and Yueyang section of Hunan Province (Danyue Expressway) under construction, based on the improved Liang's method, the transverse slope and longitudinal slope are set up. The influence of longitudinal slope and transverse slope of curved wide box girder bridge is analyzed by four different finite element models without setting horizontal slope, setting longitudinal slope and setting transverse slope. Based on the contrastive analysis of three supports and four supports in radial arrangement of the first curved wide box girder bridge on ramp A, it is suggested that the radial arrangement of three supports of the original bridge should be changed to four, so that the supports can be used more effectively.
【學(xué)位授予單位】：中南林業(yè)科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U448.213
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