基于大数据的RC梁技术经济环境指标信息相关性研究

发布时间：2018-06-04 20:13

本文选题：可靠度 + 环境影响评价　；参考：《北京交通大学》2017年硕士论文

【摘要】：桥梁可持续发展要综合考虑桥梁的可靠度、环境影响与成本,促进桥梁安全性、环境效益与成本效益的平衡,减少资源使用、减少环境污染、降低施工成本、延长使用寿命。然而,当前国内外对桥梁可靠性的深入探讨与研究还不够,桥梁可靠度的影响因素还不够明确;对桥梁环境影响评价、成本分析还只是针对某一案例进行;基于大数据的从桥梁可靠度、环境影响、成本综合角度进行桥梁可持续的研究还是空白。针对以上问题,本文根据桥梁可持续性评价理论,基于大数据进行桥梁受弯构件可靠度、环境影响与成本信息相关性的综合研究。采用蒙特卡洛数值模拟法与改进验算点法相结合的方法进行桥梁受弯构件的可靠度计算;采用生态指标法的终点破坏模型,进行桥梁受弯构件制造与施工阶段的环境影响分析;综合桥梁建设的设备费、人工费、预备费与材料费,根据建立的环境成本计算模型,进行了桥梁受弯构件制造与施工阶段的成本分析;引入大数据处理方法最大信息相关系数(the maximal information coefficient,MIC),分析了基于大数据的桥梁受弯构件8个尺寸参数、三类环境影响类别、成本之间的信息相关性,具体工作如下:(1)通过改变桥梁设计参数,进行了 20000组新建桥梁受弯构件的设计,形成了桥梁受弯构件数据库。引入大量不确定性因子,根据建立的桥梁受弯构件抗弯极限状态功能函数,采用蒙特卡洛数值模拟法与改进验算点法相结合对数据库中受弯构件的可靠指标进行了计算并分析了其分布类型,并且运用主成分分析法探讨了 8个尺寸参数对可靠指标的影响。(2)对基于大数据的桥梁受弯构件环境影响评价的目的和范围进行了界定,计算了生命周期清单,运用生态指标法的终点破坏模型,进行了桥梁制造与施工阶段的环境影响分析,并探讨了环境影响构成及其影响因素,经过计算发现桥梁生产阶段环境影响类别中资源能源消耗占比最大,桥梁施工阶段生态系统损伤占比最大。(3)在进行桥梁生命周期成本计算的过程中,不仅对基于大数据的桥梁受弯构件进行了材料费、人工费、设备费、预备费的分析计算,还基于环境影响评价的生命周期清单,进行了环境成本的探讨研究,形成了基于大数据的桥梁受弯构件成本分析模型,分析了成本构成和影响因素。得出桥梁制造与施工阶段成本构成中,占比最大的是环境成本。(4)基于大数据的桥梁受弯构件包含大量的指标信息,首次将大数据处理方法的最大信息相关系数(the maximal information coefficient,MIC)引入到土木工程研究,分析了基于大数据的桥梁受弯构件8个尺寸参数、三类环境影响类别、成本的信息相关性。经过分析发现,当成本一定时,三种类别环境影响从大到小依次是资源能源消耗、生态系统损伤、人类健康损伤;当梁高一定时,三种类别环境影响从大到小依次是资源能源消耗、人类健康损伤、生态系统损伤;当桥跨一定时,三种类别环境影响从大到小依次是资源能源消耗、生态系统损伤、人类健康损伤。
[Abstract]:The sustainable development of bridges should consider the reliability of bridge, environmental impact and cost, promote bridge safety, balance the environmental benefits and cost benefits, reduce the use of resources, reduce environmental pollution, reduce the construction cost and prolong the service life. However, the in-depth study and study of bridge reliability at home and abroad is not enough, bridge reliability is not enough. The influence factors of the degree are not clear enough; for the bridge environmental impact assessment, the cost analysis is only for a certain case; based on the large data from the bridge reliability, the environmental impact, the cost synthesis angle to carry on the bridge sustainable research is still blank. A comprehensive study of the reliability of the flexural member of the bridge and the correlation between the environmental impact and the cost information. The reliability of the bridge subjected to bending is calculated by combining the Monte Carlo numerical simulation method with the improved checking point method, and the environment shadow of the bridge flexural member manufacturing and construction stages is carried out by the end failure model of the ecological index method. Sound analysis; equipment fee, artificial fee, preparation fee and material fee for comprehensive bridge construction. Based on the established environmental cost calculation model, the cost analysis of bridge flexural member manufacturing and construction phase is carried out. The maximum information correlation coefficient (the maximal information coefficient, MIC) is introduced to analyze large data based on large data processing method. 8 dimensional parameters of bridge flexural members, three types of environmental impact categories, and information correlation between costs, the specific work is as follows: (1) by changing the design parameters of the bridge, 20000 sets of new bridge flexural members are designed, and the database of the bridge flexural members is formed. A large number of uncertainty factors are introduced to the flexural members of the bridge. With the combination of Monte Carlo numerical simulation and improved checking point method, the reliability index of flexural members in the database is calculated and its distribution type is analyzed by using the Monte Carlo numerical simulation method and the method of principal component analysis. The effect of 8 dimensional parameters on the reliability index is discussed. (2) the flexural structure of the bridge based on large data. The purpose and scope of the environmental impact assessment are defined, the life cycle list is calculated, the end damage model of the ecological index method is used, the environmental impact analysis of the bridge manufacturing and construction stages is carried out, and the environmental impact composition and its influencing factors are discussed. The resources can be found in the environmental impact category of the bridge production stage after calculation. The ratio of source consumption is the largest, and the ratio of ecological system damage to bridge construction is the largest. (3) in the process of bridge life cycle cost calculation, the analysis and calculation of material fee, labor cost, equipment fee and preparation fee are not only carried out for bridge flexural members based on large data, but also based on the life cycle list of environmental impact assessment, and the environment is carried out. The cost analysis model of bridge flexural members based on large data is formed, and the cost composition and influence factors are analyzed. It is concluded that the largest proportion of the cost composition of bridge manufacturing and construction phase is the environmental cost. (4) large data based bridge flexural members contain large number of index information, and the large data processing party is first used for the first time. The maximum information correlation coefficient (the maximal information coefficient, MIC) is introduced into civil engineering research, and the information correlation of 8 dimensions, three types of environmental impact categories and cost is analyzed based on large data. The analysis shows that, when the cost is certain, the three categories of environmental impacts are in turn from large to small. Source energy consumption, ecosystem damage and human health damage; when the beam height is fixed at a time, the three categories of environmental impacts from large to small are resource energy consumption, human health damage, and ecosystem damage. When the bridge span is certain, the three categories of environmental impacts from large to small are resource energy consumption, ecosystem damage and human health damage in turn.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U448.34

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