中小跨径简支T形梁桥设计参数分析

发布时间：2019-06-25 00:16

【摘要】：近年来，我国交通事业随着经济和社会的发展得到了快速发展，公路和铁路里程在不断增大，公路等级逐渐提高，高标准铁路开始大范围修建，交通行业在国民经济生活中发挥的作用越来越大。目前我国所修建的各种桥梁结构绝大部分为钢筋混凝土和预应力混凝土结构。在桥梁结构设计时，，为了单纯增加结构安全性或者经济性，使得桥梁结构的设计过于安全或者材料节省过多导致结构安全度降低。桥梁结构设计的合理性，直接关系到桥梁的安全、经济与耐久。桥梁设计应与交通特性和发展趋势相适应。在设计中，对于标准跨径桥梁设计可根据标准图进行设计，而对于非标准跨径或需要对标准图中设计参数进行修改时，设计参数和含钢量等一系列的设计指标对桥梁的设计和经济投入起着控制作用。结合以前桥梁建设中出现的问题，如何利用设计参数控制设计和优化设计指标值得探讨。如果设计指标过低或者过高就会造成桥梁设计的不合理，非常容易导致事故的发生或者资金的浪费。因此研究中小跨径简支梁桥设计参数取值十分必要。本文主要研究设计参数的变化趋势以及设计参数对桥梁设计指标的影响。分析设计参数，对其变化趋势进行研究。通过对设计参数的分析研究非标准图设计时设计参数的控制和选择，为设计指标的设定提供参考，可以对桥梁设计工作起到积极作用。
[Abstract]:In recent years, with the rapid development of economy and society, the mileage of highway and railway is increasing, the grade of highway is gradually improved, the high standard railway begins to be built on a large scale, and the transportation industry plays a more and more important role in national economic life. At present, most of the bridge structures built in our country are reinforced concrete and prestressed concrete structures. In the design of bridge structure, in order to simply increase the safety or economy of the structure, the design of the bridge structure is too safe or the material saving is too much, which leads to the reduction of the safety degree of the structure. The rationality of bridge structure design is directly related to the safety, economy and durability of the bridge. Bridge design should be in line with traffic characteristics and development trends. In the design, the design of the standard span bridge can be designed according to the standard drawing, while for the non-standard span or the need to modify the design parameters in the standard drawing, a series of design indexes, such as design parameters and steel content, play a role in controlling the design and economic input of the bridge. Combined with the problems in bridge construction, how to use design parameters to control the design and optimize the design index is worth discussing. If the design index is too low or too high, it will lead to unreasonable bridge design, which can easily lead to accidents or waste of funds. Therefore, it is necessary to study the design parameters of small and medium span simply supported beam bridges. In this paper, the changing trend of design parameters and the influence of design parameters on bridge design index are studied. The design parameters are analyzed and the changing trend is studied. Through the analysis and study of the design parameters, the control and selection of the design parameters in the design of non-standard drawings can provide a reference for the setting of the design index, and can play an active role in the design of the bridge.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.5

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