黄土地区沟谷地形桥梁全寿命周期成本分析

发布时间：2018-03-08 08:46

本文选题：黄土地区　切入点：桥梁全寿命周期　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：黄土冲沟是黄土地区最常见的一种侵蚀地貌，而黄土冲沟岸壁在震动、水侵等作用下容易产生崩塌或滑塌失稳，这对跨黄土冲沟地区桥梁的安全使用造成了极大危害。在黄土地区，采用传统设计方法建设的桥梁，基本上都是“重建设，轻养护”。由于只关注桥梁在建设时期上部和下部结构的经济性，桥梁在后期的运营和养护中暴露出了诸多问题，虽然在前期节省了一定的设计和建造费用，但后期的养护费用却十分巨大。传统的桥梁设计注重桥梁成桥时的使用性能，，注重建设期的安全和强度设计，忽略使用期的结构耐久性及使用寿命，以至于造成大量在役桥梁在使用期间出现结构使用寿命短、耐久性低、后期管养成本过高的问题。传统的桥梁设计理念已经不符合眼下可持续发展（尤其是耐久性问题）的需要，桥梁全寿命周期设计理论的提出，开拓性地将传统设计拓展到桥梁的全寿命周期，全面综合考虑各个阶段，从而使得桥梁在其寿命周期内性能达到最优状态。本文将基于国内外已有的研究成果上，对黄土地区沟谷地形这一特殊地区的桥梁特点进行系统分析，建立适于这一地区的桥梁全寿命周期设计方法以及其费用成本模型。主要的研究内容如下： 1、分析黄土地区沟谷地形桥梁面临的问题，从全寿命周期理论角度出发，提出应着重于设计阶段预测、解决后期桥梁主要病害问题。 2、结合沟谷地形特点，选取桥梁全寿命周期理论研究的重点方向，建立适应于这一特殊地区的全寿命周期设计方法，并对内容进行了详细研究。 3、研究了黄土地区沟谷地形桥梁全寿命周期成本费用模型，并对各项费用成本进行分析。 4、结合工程实例进行分析验证，将桥梁全寿命周期成本设计方法应用到这一地区桥梁的设计上，验证该方法的适用性。
[Abstract]:Loess gully is one of the most common erosion landforms in loess area, and loess gully bank wall is prone to collapse or collapse instability under the action of vibration and water invasion. This has done great harm to the safe use of bridges across loess gullies. In loess areas, bridges built by traditional design methods are basically "re-built," Light maintenance ". Since only paying attention to the economy of the superstructure and the substructure of the bridge during the construction period, many problems have been exposed in the later period of operation and maintenance of the bridge, although the cost of design and construction has been saved in the early stage. But later maintenance costs are enormous. The traditional bridge design pays attention to the performance of the bridge, the safety and strength design of the bridge during the construction period, and neglects the durability and service life of the structure during the service life. So that a large number of in-service bridges appear during the use of short service life, low durability, The traditional concept of bridge design has not met the needs of the current sustainable development (especially durability), and the theory of bridge life cycle design has been put forward. The traditional design is extended to the whole life cycle of the bridge and each stage is considered comprehensively so that the performance of the bridge can reach the optimal state during its life cycle. Based on the existing research results at home and abroad, this paper makes a systematic analysis of the bridge characteristics of the gully and valley topography in the loess region. The method of bridge life cycle design and its cost cost model are established. The main research contents are as follows:. The main contents are as follows: 1. The problems faced by gully and valley terrain bridges in loess region are analyzed. From the viewpoint of life-cycle theory, it is suggested that emphasis should be placed on the prediction of design stage to solve the problem of main bridge diseases in the later stage. 2. According to the characteristics of gully and valley topography, the key research direction of bridge life cycle theory is selected, and the method of life cycle design suitable for this special area is established, and the contents are studied in detail. 3. The life-cycle cost model of gully and valley bridges in loess region is studied, and the cost of each cost is analyzed. 4. The whole life cycle cost design method of the bridge is applied to the bridge design in this area, and the applicability of the method is verified by the analysis and verification of the engineering example.
【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】：U441

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