梁拱组合结构箱梁横向受力及横隔板优化布置研究
发布时间：2018-10-30 16:00
【摘要】：摘要：连续梁拱组合桥梁是目前得到快速发展一种桥梁。作为一种新型组合结构,能充分发挥拱的优越性,避免桥梁墩台承担水平力,具有较大的竖向刚度和良好的动力性能等优点,特别适合高标准铁路建设的要求。本文以温福铁路昆阳特大桥为工程背景,通过空间三维分析软件Ansys和Midas建立有限元模型,对下承式连续梁拱组合结构的横向受力和不同厚度横隔板的设置对结构的影响进行详细的分析。本文主要的研究内容包括以下方面： (1)对现有箱梁横向内力的计算方法和箱形梁结构的常用受力理论进行了阐述。 (2)建立昆阳桥Ansys全桥三维实体模型,研究箱梁顶板上缘和下缘横向应力沿纵向的变化规律。分别选取边跨区段、中跨无吊杆区段、中跨有吊杆区段位置截面,采用刚性支承法和刚性支承法加位移差法计算顶板上下缘的横向应力,将该结果与Ansys实体模型结果进行对比,验证刚性支承法与刚性支承法加位移差法的适用性。 (3)建立不同厚度横隔板的昆阳桥全桥实体模型,探讨在自重、偏载和均布荷载作用下,横隔板厚度的变化对结构的支承反力、纵向弯曲受力、横向弯曲受力和抗扭性能的影响。得出相关结论,为横隔板的设计提供意见和参考。
[Abstract]:Absrtact: continuous beam-arch composite bridge is a kind of bridge developed rapidly at present. As a new type of composite structure, it can give full play to the superiority of arch, avoid bearing horizontal force on bridge pier and abutment, have the advantages of large vertical stiffness and good dynamic performance, etc. It is especially suitable for the requirement of high standard railway construction. In this paper, based on the engineering background of Kunyang Bridge of Wenfu Railway, the finite element model is established by using three-dimensional spatial analysis software Ansys and Midas. The influence of the transverse force of the through continuous beam and arch composite structure and the setting of the different thickness of the diaphragm on the structure are analyzed in detail. The main research contents of this paper are as follows: (1) the calculation method of transverse internal force of box girder and the common force theory of box girder structure are expounded. (2) the three-dimensional solid model of Ansys full bridge of Kunyang Bridge is established to study the variation of transverse stress along the longitudinal direction of the upper and lower edge of the top plate of box girder. The lateral stress of upper and lower edge of roof is calculated by rigid support method and rigid support method plus displacement difference method. The results are compared with the results of Ansys solid model. The applicability of rigid support method and rigid support plus displacement difference method is verified. (3) the solid model of the whole bridge of Kunyang Bridge with different thickness is established. Under the action of deadweight, deflection load and uniform load, the bearing reaction force and longitudinal bending force of the thickness of the transverse diaphragm on the structure are discussed. Effects of transverse bending force and torsional resistance. Draw relevant conclusions and provide advice and reference for the design of cross-diaphragm.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441;U448.2
本文编号：2300470
[Abstract]:Absrtact: continuous beam-arch composite bridge is a kind of bridge developed rapidly at present. As a new type of composite structure, it can give full play to the superiority of arch, avoid bearing horizontal force on bridge pier and abutment, have the advantages of large vertical stiffness and good dynamic performance, etc. It is especially suitable for the requirement of high standard railway construction. In this paper, based on the engineering background of Kunyang Bridge of Wenfu Railway, the finite element model is established by using three-dimensional spatial analysis software Ansys and Midas. The influence of the transverse force of the through continuous beam and arch composite structure and the setting of the different thickness of the diaphragm on the structure are analyzed in detail. The main research contents of this paper are as follows: (1) the calculation method of transverse internal force of box girder and the common force theory of box girder structure are expounded. (2) the three-dimensional solid model of Ansys full bridge of Kunyang Bridge is established to study the variation of transverse stress along the longitudinal direction of the upper and lower edge of the top plate of box girder. The lateral stress of upper and lower edge of roof is calculated by rigid support method and rigid support method plus displacement difference method. The results are compared with the results of Ansys solid model. The applicability of rigid support method and rigid support plus displacement difference method is verified. (3) the solid model of the whole bridge of Kunyang Bridge with different thickness is established. Under the action of deadweight, deflection load and uniform load, the bearing reaction force and longitudinal bending force of the thickness of the transverse diaphragm on the structure are discussed. Effects of transverse bending force and torsional resistance. Draw relevant conclusions and provide advice and reference for the design of cross-diaphragm.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441;U448.2
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