盘锦辽东湾新区连岛东桥主桥抗震研究

发布时间：2018-06-27 03:15

本文选题：斜拉桥 + 动力特性　；参考：《大连理工大学》2014年硕士论文

【摘要】：桥梁工程是交通工程的咽喉。在我国,伴随着经济的快速发展,一跃成为全球第二大经济体的同时,交通运输业得到了极大的发展,交通网络遍及全国,这是经济增长的结果,同时也是经济增长快速平稳发展的前提。而且,促进文化交流,加强民族团结,缩小地区差距,巩固国防等,也有很重要的意义。斜拉桥是一种拉索体系,它的出现实现了桥梁的大跨型的转变,在跨径方面更优于梁式桥,在经济快速发展的今天,是一种常见的桥型。目前为止,斜拉桥由于其跨越能力大,传力路径明确,结构受力性能强,抗震性能好,再加上其独特的经济和建筑造型的优点,使得斜拉桥较之其他桥型在竞标上占据上风,得到业界的广泛关注,并已被广泛应用于桥梁工程。盘锦辽东湾新区连岛东桥坐落于“在盐碱荒滩上催生出”的辽东湾新区,跨径335米,是一座主跨采用正交异性钢桥面板钢箱梁、索塔为外形貌似天鹅的“头部”和“颈部”的空间结构、结构上较为复杂、具有独特造型的单塔空间索面钢斜拉桥。本文以盘锦辽东湾新区连岛东桥为工程背景,主要研究内容包括以下几个方面： (1)首先介绍了大跨度桥梁抗震理论的发展概况,并介绍和讨论了在桥梁抗震方面的几种研究方法； (2)利用Midas/Civil软件,并且参考相关规范,将东桥各部分进行有限元建模以及动力特性分析,分析该桥的模型的振动特性； (3)在模态分析的基础上,根据桥址地形资料和规范细则的抗震设计要求,选用Senfer-t波作为地震动输入,进行在该地震波激励下(纵向+竖向组合)的空间地震时程响应分析； (4)应用抗震理论,通过软件对东桥进行减隔震措施的模型建立,并将该桥的计算结果与未采用减隔震措施的计算结果进行分析对比,并同采取固结方式的桥梁模型在内力方面进行比较,得出相关结论。通过对该斜拉桥在地震作用下表现出的性能,能够在今后的桥梁抗震设计方面作为参考资料。
[Abstract]:Bridge engineering is the throat of traffic engineering. In China, with the rapid development of the economy, the transportation industry has been greatly developed while it has become the second largest economy in the world, and the transportation network has spread all over the country, which is the result of economic growth. At the same time is also the premise of rapid and steady economic growth. Moreover, it is also of great significance to promote cultural exchanges, strengthen national unity, narrow regional disparities and consolidate national defense. The cable-stayed bridge is a kind of cable system, which realizes the transformation of the long-span type of the bridge, and is better than the girder bridge in the aspect of span. It is a common bridge type in the rapid development of economy today. So far, the cable-stayed bridge has the advantages of large span ability, clear transmission path, strong mechanical performance, good seismic performance, and its unique economic and architectural advantages, which makes the cable-stayed bridge have the upper hand in competitive bidding compared with other bridge types. Has been widely concerned by the industry, and has been widely used in bridge engineering. Liandao East Bridge of Panjin Liaodong Bay New area is located in the new area of Liaodong Bay, with a span of 335 meters. It is a steel box girder with orthotropic steel bridge face slab. The cable-tower is a kind of spatial structure of "head" and "neck" which looks like a swan. The structure is more complicated and has a unique shape of single tower space cable plane steel cable-stayed bridge. This paper takes Liandao Dongqiao Bridge of Panjin Liaodong Bay New area as the engineering background. The main research contents include the following aspects: (1) the development of seismic theory of long-span bridge is introduced firstly. Several research methods of bridge seismic resistance are introduced and discussed. (2) using Midas / Civil software and referring to relevant codes, the finite element modeling and dynamic characteristic analysis of each part of the bridge are carried out. The vibration characteristics of the model of the bridge are analyzed. (3) based on the modal analysis, Senfer-t wave is selected as the input of ground motion according to the seismic design requirements of the topographic data of the bridge site and the specifications. The spatial seismic time-history response analysis under the excitation of the seismic wave (longitudinal vertical combination) is carried out. (4) the seismic theory is applied to establish the model of the isolation measures for the east bridge by software. The calculated results of the bridge are compared with those of the bridge without seismic isolation, and the results are compared with the internal force of the bridge model with the consolidation method, and the relevant conclusions are drawn. Through the performance of the cable-stayed bridge under earthquake action, it can be used as a reference for the seismic design of the bridge in the future.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55

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