先简支后连续梁桥抗震设计理论研究
发布时间：2018-11-07 19:55
【摘要】：在最近几年,世界各地地震频发,尤其是中国,更是遭受了严重的汶川地震,给国家、人民造成了严重的生命、财产损失,桥梁作为道路的枢纽,是重要的生命线之一,道路的好坏、畅通是保证救援工作能否第一时间开展的重要因素,而先简支后连续梁桥在桥梁总数上占很大比重,所以研究该特定桥型抗震性能意义重大。然而我国对先简支后连续梁桥的抗震设计理论没有针对性的规定,缺乏相应的设计参考依据,震害资料十分匮乏。本文主要以鹦鹉沟一号大桥为依托工程背景,借助于大型有限元分析软件,建立需求合理化模型,并对鹦鹉沟一号大桥的有限元模型进行动力特性分析,本文主要做了以下几部分工作:1、通过阅读大量桥梁抗震方面的资料,对确定性地震分析方法和非确定性分析方法等进行系统的回顾和总结。2、结合工程材料对先简支后连续梁桥该特定桥型的动力特性进行研究,包括简支梁桥、先简支后连续梁桥和连续梁桥静力效果和动力特性之间的不同,以及找到哪些因素是影响桥梁结构动力特性的敏感性系数。3、对鹦鹉沟一号大桥进行地震动仿真模拟分析,得到了桥梁结构在三种地震波加速度动力响应、速度动力响应、位移动力响应和内力动力响应,并进行分析。4、对减隔震设计桥梁抗震性能进行量化分析,把支座形式的选取作为研究重点,通过选取不用的支座类型查看桥梁结构在地震动的动力反应,并进行对比分析。5、进行非线性分析,定义材料模型的本构关系,同时考虑桩土效应,通过纤维模型的分析方法对桥梁下部结构进行分析,并单独进行的自振特性分析;得到结构自身材料的曲率-曲线、非弹性铰状态和动力时程反应的滞回曲线等。6、结合上述研究内容进行分析汇总,得出预期的结论,同时进行展望总结不足。通过对先简支后连续梁桥抗震性能的研究分析,得到一些意义重大的研究成果,为其设计理论的完善、有效抗震措施的提出和震后病害桥梁的加固具有较大的社会意义和工程应用价值。
[Abstract]:In recent years, the frequent earthquakes around the world, especially in China, have suffered from the severe Wenchuan earthquake, causing serious loss of life and property to the country and the people, and bridges, as hubs of roads, are one of the important lifelines. Good or bad roads, smooth is an important factor to ensure the rescue work can be carried out in the first time, and the first simply supported continuous beam bridge in the total number of bridges account for a large proportion, so it is of great significance to study the seismic performance of the specific bridge type. However, the seismic design theory of simple support and continuous beam bridge in our country is not specific, and the corresponding design reference is lacking, and the seismic damage data is very scarce. In this paper, based on the engineering background of the No.1 Bridge in the parakou, with the aid of the large-scale finite element analysis software, the demand rationalization model is established, and the dynamic characteristics of the finite element model of the No.1 Bridge are analyzed. The main work of this paper is as follows: 1. Through reading a large number of bridge seismic data, the deterministic seismic analysis methods and non-deterministic analysis methods are systematically reviewed and summarized. Combined with engineering materials, the dynamic characteristics of this particular type of bridge are studied, including the difference between the static effect and dynamic characteristics of the simply supported beam bridge, the first supported continuous beam bridge and the continuous beam bridge. And find out which factors affect the dynamic characteristics of the bridge structure sensitivity coefficient. 3. Based on the simulation analysis of ground motion of the No.1 Bridge, the acceleration dynamic response of the bridge structure in three kinds of seismic waves is obtained. Displacement dynamic response and internal force dynamic response are analyzed. 4. The aseismic performance of the isolated bridge is analyzed quantitatively, and the selection of bearing form is regarded as the key point of the research. The dynamic response of bridge structure to ground motion is analyzed by selecting the type of support that is not needed. 5. The nonlinear analysis is carried out to define the constitutive relation of the material model, and the pile-soil effect is taken into account at the same time. The analysis method of fiber model is used to analyze the bridge understructure, and the natural vibration characteristic is analyzed separately. The curvature curve, the hysteretic curve of the inelastic hinge state and the dynamic time history response are obtained. Through the research and analysis of the seismic behavior of the bridge with simple support and continuous beam, some significant research results are obtained for the perfection of the design theory. It is of great social significance and engineering application value to put forward effective seismic measures and strengthen the damaged bridges after earthquake.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55
本文编号：2317408
[Abstract]:In recent years, the frequent earthquakes around the world, especially in China, have suffered from the severe Wenchuan earthquake, causing serious loss of life and property to the country and the people, and bridges, as hubs of roads, are one of the important lifelines. Good or bad roads, smooth is an important factor to ensure the rescue work can be carried out in the first time, and the first simply supported continuous beam bridge in the total number of bridges account for a large proportion, so it is of great significance to study the seismic performance of the specific bridge type. However, the seismic design theory of simple support and continuous beam bridge in our country is not specific, and the corresponding design reference is lacking, and the seismic damage data is very scarce. In this paper, based on the engineering background of the No.1 Bridge in the parakou, with the aid of the large-scale finite element analysis software, the demand rationalization model is established, and the dynamic characteristics of the finite element model of the No.1 Bridge are analyzed. The main work of this paper is as follows: 1. Through reading a large number of bridge seismic data, the deterministic seismic analysis methods and non-deterministic analysis methods are systematically reviewed and summarized. Combined with engineering materials, the dynamic characteristics of this particular type of bridge are studied, including the difference between the static effect and dynamic characteristics of the simply supported beam bridge, the first supported continuous beam bridge and the continuous beam bridge. And find out which factors affect the dynamic characteristics of the bridge structure sensitivity coefficient. 3. Based on the simulation analysis of ground motion of the No.1 Bridge, the acceleration dynamic response of the bridge structure in three kinds of seismic waves is obtained. Displacement dynamic response and internal force dynamic response are analyzed. 4. The aseismic performance of the isolated bridge is analyzed quantitatively, and the selection of bearing form is regarded as the key point of the research. The dynamic response of bridge structure to ground motion is analyzed by selecting the type of support that is not needed. 5. The nonlinear analysis is carried out to define the constitutive relation of the material model, and the pile-soil effect is taken into account at the same time. The analysis method of fiber model is used to analyze the bridge understructure, and the natural vibration characteristic is analyzed separately. The curvature curve, the hysteretic curve of the inelastic hinge state and the dynamic time history response are obtained. Through the research and analysis of the seismic behavior of the bridge with simple support and continuous beam, some significant research results are obtained for the perfection of the design theory. It is of great social significance and engineering application value to put forward effective seismic measures and strengthen the damaged bridges after earthquake.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55
【参考文献】
相关期刊论文 前1条
1 陈奉民;张丽娟;;“先简支后连续”梁桥的设计及应用[J];公路交通技术;2006年01期
，本文编号：2317408
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