正交异性钢桥面沥青铺装结构可靠度分析

发布时间：2018-11-26 11:21

【摘要】：正交异性钢桥面沥青铺装是国内外工程难题。实际使用过程中,许多钢桥面铺装的使用寿命往往达不到设计使用年限,容易出现早期破坏,如开裂、车辙、脱层等病害,导致钢桥面沥青铺装结构失效。研究正交异性钢桥面沥青铺装结构可靠度设计方法,对正交异性钢桥面沥青铺装结构设计,以及提高钢桥面沥青铺装结构可靠度和使用寿命的意义是非常大的。本文针对正交异性钢桥面沥青铺装存在的开裂和层间剪切滑移等主要破坏形式,以正交异性钢桥面局部梁段为研究对象,采用数值模拟的方法,分析了正交异性钢桥面沥青铺装可靠性计算参数,提出了基于可靠度的钢桥面沥青铺装结构设计方法,且将其成功应用于实体工程结构设计使用年限的检验中。论文所做主要工作及研究的成果如下:1.采用相对成熟的蒙特卡洛计算法进行钢桥面沥青铺装结构可靠度计算,并通过相关文献的资料收集和数据统计。2.对钢桥面沥青铺装结构可靠性理论进行了简单介绍,建立基于有限元的钢桥面沥青铺装结构可靠度计算分析模型,提出了钢桥面沥青铺装可靠度设计指标的功能函数方程,对设计指标的可靠度以及输出变量的概率分布类型进行了分析,并分析了影响输出变量对结构设计参数的敏感性。3.建立了基于可靠度的钢桥面沥青铺装结构设计方法,并举例进行说明。4.对实体工程进行了数据收集与统计,结合可靠度设计方法,对设计完成的实体工程钢桥面沥青铺装结构进行可靠度分析,分析了三种不同铺装方案的可靠度,并进行对比。
[Abstract]:Asphalt pavement of orthotropic steel deck is a difficult problem at home and abroad. In the process of practical use, many steel bridge deck pavement service life is often not up to the design life, prone to early damage, such as cracking, rutting, delamination and other diseases, resulting in steel bridge deck asphalt pavement structure failure. This paper studies the reliability design method of orthotropic steel deck asphalt pavement. It is of great significance to design orthotropic steel deck asphalt pavement structure and to improve the reliability and service life of steel bridge deck asphalt pavement structure. Aiming at the main failure forms such as cracking and interlayer shear slip of orthotropic steel deck asphalt pavement, this paper takes the local beam section of orthotropic steel deck as the research object, and adopts the method of numerical simulation. The reliability calculation parameters of orthotropic steel deck asphalt pavement are analyzed, and the reliability based design method of steel bridge deck asphalt pavement is put forward, and it is successfully applied to test the service life of solid engineering structure design. The main work and research results are as follows: 1. A relatively mature Monte Carlo method is used to calculate the reliability of steel bridge deck asphalt pavement structure. In this paper, the reliability theory of steel bridge deck asphalt pavement structure is briefly introduced, the calculation and analysis model of steel bridge deck asphalt pavement structure reliability based on finite element method is established, and the function equation of steel bridge deck asphalt pavement reliability design index is put forward. The reliability of the design index and the probability distribution type of the output variables are analyzed, and the sensitivity of the output variables to the structural design parameters is analyzed. The design method of steel bridge deck asphalt pavement structure based on reliability is established, and an example is given to illustrate it. Based on the data collection and statistics of solid engineering, the reliability analysis of asphalt pavement structure of steel bridge deck was carried out by combining the reliability design method, and the reliability of three different paving schemes was analyzed and compared.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U443.33

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