廊桥桥身挠曲对廊桥上部结构内力和变形的影响
发布时间：2019-06-24 19:15
【摘要】：我国古代桥梁历史悠久,形式丰富多样。其中廊桥作为一种具有丰富文化内涵和结构特色的建筑形式,是房屋的建筑艺术和桥梁的结构造型有机融合而成的完美产物,随着工艺技术的进步和社会需求的增长,廊桥数量越来越多,跨度越来越大,结构形式也日益多样化,一些廊桥已经在当地形成了一道独特的风景线,对廊桥的研究和设计越来越受到人们的重视。然而多数廊桥的设计都是把桥体设计和上部结构的设计分开来考虑的,很少注意到廊桥桥体对上部结构的影响,实际上廊桥的桥身挠曲变形会对廊桥上部结构产生不利的影响,情节严重的甚至会使之坍塌、毁坏,造成严重后果。因此,对廊桥桥身挠曲引起上部结构的受力性能进行分析也显得尤为重要。本文首先就廊桥的基本功能、设计与造型特点做了简要讨论,接着应用相关的理论知识计算出廊桥主殿桥身的不同挠曲引起上部结构的沉降量,然后采用有限元数值分析软件Midas/Civil建立了风雨廊桥主殿的计算模型,借助软件计算出的数据来讨论廊桥桥身挠曲对上部结构的影响。主要进行了两点分析:先分析了廊桥主殿桥身产生最大挠曲引起上部结构沉降,从而对上部结构内力和变形的影响,然后进一步研究了风雨廊桥主殿桥身的不同挠曲变化对上部结构内力和变形的影响,并将几种结果进行对比分析,以此研究廊桥下部桥体结构挠曲变形对廊桥上部结构的影响。通过对廊桥模型的分析可知:廊桥桥身挠曲对上部结构位移影响相对较小,其中侧殿水平位移比正殿要大一些;廊桥桥身挠曲对上部结构柱子的轴力造成很大影响,正殿或者侧殿每层的柱脚轴力最大值都在距离跨中最远的边柱上;桥身挠曲引起上部结构柱子弯矩的变化很大,主殿每层柱子的弯矩最小值都在距离跨中最近的中柱上,但是柱弯矩的最大值却不在距离跨中最远处;当廊桥主殿达最大挠度时,上部结构梁端剪力的变化和上部结构梁端弯矩的变化都很大,尤其是主殿一层的梁端弯矩和剪力在各工况作用下变化比较大。
[Abstract]:Ancient bridges in China have a long history and rich and diverse forms. As a kind of architectural form with rich cultural connotation and structural characteristics, the corridor bridge is the perfect product of the organic integration of the architectural art of the house and the structural modeling of the bridge. With the progress of technology and the growth of social demand, the number of corridor bridges is more and more, the span is becoming larger and larger, and the structural forms are becoming more and more diversified. Some corridor bridges have formed a unique landscape in the local. More and more attention has been paid to the research and design of corridor bridges. However, most of the design of the corridor bridge is considered separately from the design of the superstructure, and little attention is paid to the influence of the bridge body on the superstructure. In fact, the deflection and deformation of the bridge body will have a negative impact on the superstructure of the bridge, and the circumstances will even collapse and destroy, resulting in serious consequences. Therefore, it is particularly important to analyze the mechanical properties of superstructure caused by deflection of corridor bridge. In this paper, the basic functions, design and modeling characteristics of the corridor bridge are briefly discussed, and then the settlement of the superstructure caused by different deflection of the main hall of the corridor bridge is calculated by using the relevant theoretical knowledge. Then, the calculation model of the main hall of the wind and rain corridor bridge is established by using the finite element numerical analysis software Midas/Civil, and the influence of the deflection of the bridge body on the superstructure is discussed with the help of the data calculated by the software. This paper mainly analyzes two points: firstly, it analyzes the influence of the maximum deflection of the main hall bridge body on the internal force and deformation of the superstructure, and then further studies the influence of different deflection changes of the main hall bridge body on the internal force and deformation of the superstructure, and compares and analyzes several results, so as to study the influence of the deflection deformation of the lower bridge structure of the corridor bridge on the superstructure of the superstructure. Through the analysis of the corridor bridge model, it can be seen that the deflection of the bridge body has relatively little effect on the displacement of the superstructure, in which the horizontal displacement of the side hall is larger than that of the main hall, and the deflection of the bridge body has a great influence on the axial force of the columns of the superstructure, and the maximum axial force of the column foot of each floor of the main hall or side hall is on the side column farthest from the middle of the span. The bending moment of the superstructure column changes greatly due to the deflection of the bridge body. The minimum bending moment of each column in the main hall is on the middle column nearest to the span, but the maximum bending moment of the column is not the farthest from the middle span. When the maximum deflection of the main hall of the corridor bridge reaches, the variation of the shear force at the beam end of the superstructure and the bending moment at the beam end of the superstructure are great, especially the bending moment and shear force at the beam end of the first floor of the main hall vary greatly under various working conditions.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441
本文编号：2505299
[Abstract]:Ancient bridges in China have a long history and rich and diverse forms. As a kind of architectural form with rich cultural connotation and structural characteristics, the corridor bridge is the perfect product of the organic integration of the architectural art of the house and the structural modeling of the bridge. With the progress of technology and the growth of social demand, the number of corridor bridges is more and more, the span is becoming larger and larger, and the structural forms are becoming more and more diversified. Some corridor bridges have formed a unique landscape in the local. More and more attention has been paid to the research and design of corridor bridges. However, most of the design of the corridor bridge is considered separately from the design of the superstructure, and little attention is paid to the influence of the bridge body on the superstructure. In fact, the deflection and deformation of the bridge body will have a negative impact on the superstructure of the bridge, and the circumstances will even collapse and destroy, resulting in serious consequences. Therefore, it is particularly important to analyze the mechanical properties of superstructure caused by deflection of corridor bridge. In this paper, the basic functions, design and modeling characteristics of the corridor bridge are briefly discussed, and then the settlement of the superstructure caused by different deflection of the main hall of the corridor bridge is calculated by using the relevant theoretical knowledge. Then, the calculation model of the main hall of the wind and rain corridor bridge is established by using the finite element numerical analysis software Midas/Civil, and the influence of the deflection of the bridge body on the superstructure is discussed with the help of the data calculated by the software. This paper mainly analyzes two points: firstly, it analyzes the influence of the maximum deflection of the main hall bridge body on the internal force and deformation of the superstructure, and then further studies the influence of different deflection changes of the main hall bridge body on the internal force and deformation of the superstructure, and compares and analyzes several results, so as to study the influence of the deflection deformation of the lower bridge structure of the corridor bridge on the superstructure of the superstructure. Through the analysis of the corridor bridge model, it can be seen that the deflection of the bridge body has relatively little effect on the displacement of the superstructure, in which the horizontal displacement of the side hall is larger than that of the main hall, and the deflection of the bridge body has a great influence on the axial force of the columns of the superstructure, and the maximum axial force of the column foot of each floor of the main hall or side hall is on the side column farthest from the middle of the span. The bending moment of the superstructure column changes greatly due to the deflection of the bridge body. The minimum bending moment of each column in the main hall is on the middle column nearest to the span, but the maximum bending moment of the column is not the farthest from the middle span. When the maximum deflection of the main hall of the corridor bridge reaches, the variation of the shear force at the beam end of the superstructure and the bending moment at the beam end of the superstructure are great, especially the bending moment and shear force at the beam end of the first floor of the main hall vary greatly under various working conditions.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441
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