弯桥加固方案层次分析优选法及加固效果分析

发布时间：2018-05-27 13:33

本文选题：弯梁桥 + 桥梁加固　；参考：《长沙理工大学》2014年硕士论文

【摘要】：在我国交通飞速发展过程中,弯梁桥因为其能很好的适应地形、地物的限制,能高效的利用土地资源和提高通行效率等特点,得以大量的应用在我国现代化道路的建设中。然而因为弯梁桥的特殊结构特点以及相关研究不足等原因,不少弯桥都出现了不同情况的病害。本文首先针对弯梁桥,详细的阐述了其受力特点以及常见的病害。其次,随着世界各国对旧桥、危桥以及问题桥梁的加固研究重视程度提高,桥梁检测的加固研究有了深入发展,对桥梁结构的加固已经形成了一系列较为成熟和完整的理论成果。其中,对于不同桥梁结构的加固方式及多种新型材料的应用取得了大量丰硕的应用成果。本文针对桥梁常用的几种加固方法,详细阐述和总结了几种加固方法的特点、适用性、优缺点和加固中的注意事项。本文的核心内容则着眼于桥梁加固方案的选择,结合桥梁的检测结果运用层次分析法,构建了桥梁加固方案选择的两级评判指标模型,对备选加固方案进行方案优选。采用已选方案对桥梁加固后,借助有限元分析软件计算出加固后各控制截面的预计加固内力目标值,并与静动载试验的试验结果进行比对分析,分析结果表明优选方案的结构加固效果理想。从而说明了层次分析法在弯桥加固方案选择中具有相当的适用性。
[Abstract]:In the process of rapid development of traffic in China, curved girder bridge can adapt to the constraints of terrain, features, can efficiently use land resources and improve the efficiency of traffic, so it can be widely used in the construction of modern roads in China. However, due to the special structural characteristics of curved girder bridges and the lack of relevant research, many curved bridges have different diseases. In this paper, the stress characteristics and common diseases of curved girder bridge are described in detail. Secondly, with the countries in the world pay more attention to the reinforcement of old bridges, dangerous bridges and problem bridges, the study of bridge strengthening has developed deeply. The reinforcement of bridge structure has formed a series of mature and complete theoretical achievements. Among them, a great deal of achievements have been made in the application of different bridge reinforcement methods and many new materials. In this paper, the characteristics, applicability, advantages and disadvantages of several reinforcement methods for bridges are described and summarized in detail. The core content of this paper is focused on the selection of bridge reinforcement scheme. Combined with the test results of bridge, the two-level evaluation index model of bridge reinforcement scheme selection is constructed by using AHP method, and the alternative reinforcement scheme is selected. After strengthening the bridge with the selected scheme, the target value of the predicted internal force of each control section after reinforcement is calculated by means of finite element analysis software, and compared with the test results of static and dynamic load test. The analysis results show that the structure reinforcement effect of the optimal scheme is ideal. It shows that AHP is applicable in the selection of flexural bridge reinforcement scheme.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.72

【相似文献】