连续刚构桥防落梁抗震性能分析

发布时间：2018-03-30 00:18

本文选题：连续刚构桥　切入点：落梁　出处：《苏州科技大学》2017年硕士论文

【摘要】：桥梁上部结构的落梁破坏是毁灭性的。目前美国、日本等国家对于这一问题十分重视,都在积极研究防落梁措施,并且已经取了许多成果,防落梁系统也较为完善。然而我国在该方面的发展起步较晚,对于防落梁系统还有许多需要研究的地方。所以防落梁装置的研究,对我国抗震研究有着重大的意义。本文主要基于一座实地的连续刚构桥(40m+65m+100m+65m+40m)进行连梁装置的设计参数的选取,并且针对不同的设计参数进行地震时程反应的分析。主要做了以下几方面的工作:(1)通过查阅近年来桥梁震害报告分析总结了一些桥梁震害的原因。(2)通过查阅大量的文献数据的分析比较研究了各国的防落梁系统结构,并对各国的防落梁系统、防落梁装置进行了对比分析。(3)通过模拟一座连续刚构桥,选取不同的连续刚构桥的参数(墩高比、支座摩擦系数、梁间间隙),对比分析了不同的桥梁参数对连续刚构桥地震反应的影响,结果表明了连续刚构桥应当尽量选择对称结构,并且在桥梁性能满足使用要求的条件下尽量增大桥台和主梁之间的间隙,这样设置有利于减小连续刚构桥的整体位移反应。(4)根据日本的连梁装置的设计思路,采用了1.5倍恒载反力法的设计方法计算得出连梁装置的主要设计参数,并且通过计算机软件的模拟分析,研究不同的连梁装置设计参数对于连续刚构桥的影响。经过一系列的分析表明连梁装置的确可以减小连续刚构桥的整体位移反应,并且增加桥梁整体结构刚度以及抗推刚度,但同时对桥墩造成了更大的压力,应该注意增加桥墩的延性设计。
[Abstract]:At present, the United States, Japan and other countries attach great importance to this problem and are actively studying measures to prevent falling beams, and have already achieved a lot of results. The anti-falling beam system is also relatively perfect. However, the development of this aspect in our country started relatively late, and there are still many research areas for the anti-falling beam system. So the research of the anti-falling beam device, This paper is based on a continuous rigid frame bridge of 40m 65m 100m 65m 40m) to select the design parameters of the connecting beam device. And for different design parameters of seismic time response analysis. Mainly do the following aspects of work: 1) through the review of recent bridge damage report analysis and summary of some bridge damage reasons. 2) through consulting a large number of bridge damage. In this paper, the structure of the anti-falling beam system in various countries is analyzed and compared with the literature data. Through simulating a continuous rigid frame bridge, the parameters of different continuous rigid frame bridge (pier-height ratio, friction coefficient of support) are selected. The effects of different bridge parameters on seismic response of continuous rigid frame bridges are compared and analyzed. The results show that continuous rigid frame bridges should choose symmetrical structures as far as possible. And the gap between abutment and main beam can be increased as much as possible under the condition that the performance of bridge meets the requirement of use, which is helpful to reduce the overall displacement response of continuous rigid frame bridge. (4) according to the design idea of the connecting beam device in Japan, it is helpful to reduce the overall displacement response of the continuous rigid frame bridge. The design method of 1.5 times dead load reaction method is used to calculate the main design parameters of the connecting beam device, and the simulation analysis of the computer software is carried out. The influence of different design parameters on continuous rigid frame bridge is studied. A series of analysis shows that the connected beam device can reduce the overall displacement response of the continuous rigid frame bridge and increase the stiffness of the whole structure and the anti-push stiffness of the bridge. But at the same time, it creates more pressure on the piers, so we should pay more attention to the ductility design of the piers.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.55;U448.23

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