大跨度钢桁架桥的地震响应分析

发布时间：2018-05-01 08:40

本文选题：大跨度钢桁架桥梁 + 抗震性能　；参考：《河北工程大学》2014年硕士论文

【摘要】：桥梁是铁路工程、抗震防灾、危机管理系统重要组成部分，在抗震救灾中有很重要的位置。为了减少地震灾害形成的破坏，不仅要对桥梁做好抗震加固措施，也要在桥梁设计上采取相应措施以满足抗震要求，提高桥梁的抗震能力，因此对响应的桥梁地震响应分析是必要的。本文通过查阅相关文献，对桥梁抗震的现状、问题等作了分析总结，并且采用大型通用软件ANSYS软件对一个大跨度钢桁架桥进行了地震响应分析，得出大跨度钢桁桥的动力特性和该桥体系的一些抗震性能，为以后进一步研究打下基础。具体包括以下几个方面：（1）通过查阅资料，阐述了对桥梁进行抗震性能分析的现状，存在问题，，以及对桥梁的减轻震害的一些设计思想，并总结了有关抗震性能分析的相关理论，为后期进行桥梁结构的抗震分析作基础。（2）采用有限元软件ANSYS对一个实例工程大跨度钢桁架桥进行模态分析，得到了桥梁结构的自振频率和振型图，分析研究得到了其有关振动特性。（3）采用有限元软件ANSYS对大跨度钢桁架桥进行地震波的瞬态分析，研究其分别在三种不同作用下该桥的抗震性能。通过分析研究，得到了桥梁跨中控制截面上下节点的位移响应曲线图，以及位移峰值，对其进行对比分析，得出该桥体系的一些抗震性能，为后期抗震设计提供一些参考。
[Abstract]:Bridge is an important part of railway engineering, earthquake resistant and disaster prevention and crisis management system. It has a very important position in earthquake relief. In order to reduce the damage caused by earthquake disaster, not only should the bridge be reinforced, but also the bridge design should be taken to fill the seismic requirements and improve the seismic capacity of the bridge, so the response of the bridge is improved. It is necessary to analyze the seismic response of the bridge.
In this paper, through consulting relevant literature, the present situation and problems of bridge earthquake resistance are analyzed and summarized, and the seismic response analysis of a large span steel truss bridge is carried out by large scale general software ANSYS software, and the dynamic characteristics of the long-span steel truss bridge and some seismic performance of the bridge system are obtained, which will lay a foundation for further research. The body includes the following aspects:
(1) through the reference data, this paper expounds the present situation of the seismic performance analysis of the bridge, the existing problems, and some design ideas for the bridge mitigation of earthquake damage, and summarizes the related theories about the seismic performance analysis, which is the basis for the seismic analysis of the bridge structures in the later period.
(2) the finite element software ANSYS is used to analyze the modal analysis of a large span steel truss bridge with an example project. The vibration frequency and vibration pattern of the bridge structure are obtained, and the related vibration characteristics are obtained by the analysis and research.
(3) the seismic wave transient analysis of the long-span steel truss bridge is carried out by the finite element software ANSYS, and the seismic performance of the bridge is studied under three different effects. The displacement response curves of the upper and lower section of the bridge cross section and the peak shift peak are obtained through the analysis and study. The comparison analysis is made to the bridge system and the bridge system is obtained. Some seismic performance provides some references for later seismic design.

【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55

【参考文献】