连续刚构桥施工仿真及地震响应分析
发布时间：2018-09-19 08:38
【摘要】：随着桥梁施工工艺的逐步提高,连续刚构桥跨径不断增大,但随之而来的关于如何在施工过程中控制施工安全和施工质量成为一个棘手的问题,这就要求我们必须借助于大型有限元软件对桥梁进行仿真模拟,找出施工过程中的控制参数,进而更好的指导施工。另外,作为一个地震活动频繁的国家,在历次地震中,桥梁等基础设施都受到了很大的破坏,桥梁结构动力特性是评价桥梁承载能力和运营状况的重要指标,分析预应力连续刚构桥的动力特性是分析地震响应和进行地震设计的前提,通过桥梁结构动力分析,可以求出结构的各阶频率和相应的振型,进而了解结构刚度大小、分布情况和结构薄弱部位。本文以大广高速粤境段某连续刚构桥为背景,采用比较合理的结构分析计算理论对此桥的施工阶段进行仿真分析,同时分析桥梁施工中各种参数变化对桥梁控制部位应力和变形的影响,通过对比分析,区分出施工控制中的敏感性参数和非敏感性参数,最后对该桥进行动力特性分析和地震响应分析,为连续刚构桥的抗震分析提供一定的理论基础,本文主要通过以下几个步骤进行:(1)根据设计单位提供的设计图文件以及桥梁抗震有关知识,采用MIDAS/CIVIL建立某桥的施工阶段静力模型以及成桥阶段动力响应模型。(2)利用结构分析软件MIDAS/CIVIL对某桥施工阶段进行合理的模拟,并研究施工过程中的参数变化对桥梁相应施工阶段控制截面内力和位移的影响,分析得到施工敏感性参数和非敏感性参数。(3)介绍了目前常用的几种桥梁抗震分析方法的原理,为连续刚构桥抗震性能研究提供了理论基础。(4)以大广高速粤境段某连续刚构桥为背景,介绍了动力特性计算理论,通过计算某桥各各阶频率和相应的振型,了解此桥的动力特性。(5)以大广高速粤境段某大跨径连续刚构桥为工程背景,重点介绍了桥梁地震响应理论知识,根据拟建桥梁场地状况分别对桥梁进行反应谱分析和时程分析,对比分析两种方法得出的桥梁地震响应结果。
[Abstract]:With the gradual improvement of bridge construction technology, the span of continuous rigid frame bridge is increasing, but how to control the construction safety and construction quality in the construction process becomes a thorny problem. This requires us to use the large-scale finite element software to simulate the bridge, find out the control parameters in the construction process, and then better guide the construction. In addition, as a country with frequent earthquake activity, the bridge and other infrastructure have been destroyed greatly in the past earthquakes. The dynamic characteristics of bridge structure is an important index to evaluate the bearing capacity and operation condition of bridge. The analysis of the dynamic characteristics of prestressed continuous rigid frame bridge is the premise of seismic response analysis and seismic design. Through dynamic analysis of bridge structure, each order frequency and corresponding vibration mode of the structure can be obtained, and then the stiffness of the structure can be understood. Distribution and structural weakness. In this paper, a continuous rigid frame bridge is used as the background, and the reasonable theory of structure analysis and calculation is used to simulate and analyze the construction stage of the bridge. At the same time, the influence of various parameters on the stress and deformation of bridge control is analyzed, and the sensitive parameters and non-sensitive parameters in construction control are distinguished by comparison and analysis. Finally, the dynamic characteristics and seismic response of the bridge are analyzed, which provides a theoretical basis for the seismic analysis of the continuous rigid frame bridge. This paper mainly through the following steps: (1) according to the design documents provided by the design unit and bridge seismic knowledge, The static model and dynamic response model of a certain bridge during construction phase are established by MIDAS/CIVIL. (2) A reasonable simulation of the construction stage of a bridge is carried out by using the structure analysis software MIDAS/CIVIL. The influence of the parameter changes in the construction process on the internal force and displacement of the control section in the corresponding construction stage of the bridge is studied, and the construction sensitivity parameters and the non-sensitive parameters are obtained. (3) the principles of several commonly used seismic analysis methods for bridges are introduced. This paper provides a theoretical basis for the study of seismic behavior of continuous rigid frame bridges. (4) based on a continuous rigid frame bridge in Daguang high speed section of Guangdong province, the theory of dynamic characteristic calculation is introduced, and the frequencies and corresponding modes of each order of a bridge are calculated. To understand the dynamic characteristics of the bridge. (5) taking a long-span continuous rigid frame bridge as the engineering background, the theoretical knowledge of seismic response of the bridge is introduced emphatically, and the response spectrum and time history analysis of the bridge are carried out according to the site condition of the proposed bridge. The seismic response results obtained by the two methods are compared and analyzed.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55;U448.23
本文编号：2249617
[Abstract]:With the gradual improvement of bridge construction technology, the span of continuous rigid frame bridge is increasing, but how to control the construction safety and construction quality in the construction process becomes a thorny problem. This requires us to use the large-scale finite element software to simulate the bridge, find out the control parameters in the construction process, and then better guide the construction. In addition, as a country with frequent earthquake activity, the bridge and other infrastructure have been destroyed greatly in the past earthquakes. The dynamic characteristics of bridge structure is an important index to evaluate the bearing capacity and operation condition of bridge. The analysis of the dynamic characteristics of prestressed continuous rigid frame bridge is the premise of seismic response analysis and seismic design. Through dynamic analysis of bridge structure, each order frequency and corresponding vibration mode of the structure can be obtained, and then the stiffness of the structure can be understood. Distribution and structural weakness. In this paper, a continuous rigid frame bridge is used as the background, and the reasonable theory of structure analysis and calculation is used to simulate and analyze the construction stage of the bridge. At the same time, the influence of various parameters on the stress and deformation of bridge control is analyzed, and the sensitive parameters and non-sensitive parameters in construction control are distinguished by comparison and analysis. Finally, the dynamic characteristics and seismic response of the bridge are analyzed, which provides a theoretical basis for the seismic analysis of the continuous rigid frame bridge. This paper mainly through the following steps: (1) according to the design documents provided by the design unit and bridge seismic knowledge, The static model and dynamic response model of a certain bridge during construction phase are established by MIDAS/CIVIL. (2) A reasonable simulation of the construction stage of a bridge is carried out by using the structure analysis software MIDAS/CIVIL. The influence of the parameter changes in the construction process on the internal force and displacement of the control section in the corresponding construction stage of the bridge is studied, and the construction sensitivity parameters and the non-sensitive parameters are obtained. (3) the principles of several commonly used seismic analysis methods for bridges are introduced. This paper provides a theoretical basis for the study of seismic behavior of continuous rigid frame bridges. (4) based on a continuous rigid frame bridge in Daguang high speed section of Guangdong province, the theory of dynamic characteristic calculation is introduced, and the frequencies and corresponding modes of each order of a bridge are calculated. To understand the dynamic characteristics of the bridge. (5) taking a long-span continuous rigid frame bridge as the engineering background, the theoretical knowledge of seismic response of the bridge is introduced emphatically, and the response spectrum and time history analysis of the bridge are carried out according to the site condition of the proposed bridge. The seismic response results obtained by the two methods are compared and analyzed.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55;U448.23
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