新型钢阻尼器滞回性能试验研究与工程应用

发布时间：2018-05-04 21:16

本文选题：耗能减震 + 钢阻尼器　；参考：《重庆交通大学》2015年硕士论文

【摘要】：全世界各地地震频繁发生,我国也发生了汶川、玉树等地震灾害。而桥梁作为公路交通网络中的枢纽,在强烈的地震灾害的作用下,会由于桥梁的破坏导致整个交通网络的瘫痪。因此桥梁的抗震性能的研究已经成为一个急需解决的问题。近几十年来,通过国内外的学者研究,提出在桥梁上安装阻尼器。地震发生时,作用在桥梁结构上的地震作用力先作用在阻尼器上,这样直接作用在桥梁上的地震作用力就大大降低。提高了桥梁的抗震性能。论文首先提出了一种新型圆环加肋钢阻尼器,该阻尼器有制作方便、构造简单、经济实用的优点。利用大型有限元计算软件Ansys对新型钢阻尼器进行循环加载,分析不同的参数对新型钢阻尼器的的耗能特性、应变分布特性的影响。为新型钢阻尼器的设计制作提供参考。然后,对其中耗能性能比较的好的B10型钢阻尼器进行加工制作与试验性能过的研究,结果表明该型号新型钢阻尼器具有较好的耗能减震能力。与Ansys的数值仿真分析结果基本相符。最后,论文给出一个11跨的20m跨径的T型梁桥的算例。用MIDAS CIVIL对该算例进行非线性时程分析,分析不同工况下的自震周期、梁体最大位移、墩底内力进行对比分析。分析结果表明,新型钢阻尼器在桥梁结构在能降低在地震作用下的自震周期,梁体的位移和伸缩缝处的位移。提高了桥梁结构的抗震性能,从而有效的保护了桥梁结构。
[Abstract]:Earthquakes occur frequently all over the world, and Wenchuan, Yushu and other earthquake disasters occur in China. Bridge, as the hub of highway traffic network, will be paralyzed by the destruction of bridge under the action of strong earthquake disaster. Therefore, the study of seismic performance of bridges has become an urgent problem. In recent decades, through the research of scholars at home and abroad, the installation of dampers on bridges is proposed. When an earthquake occurs, the seismic force acting on the bridge structure acts on the damper first, so the seismic force acting directly on the bridge is greatly reduced. The seismic performance of the bridge is improved. In this paper, a new ring ribbed steel damper is proposed, which has the advantages of convenient fabrication, simple construction and economical and practical use. The new steel damper is subjected to cyclic loading with the large finite element calculation software Ansys. The influence of different parameters on the energy dissipation characteristics and strain distribution characteristics of the new steel damper is analyzed. It provides a reference for the design and manufacture of new steel damper. The experimental results show that the new type of steel damper has better energy dissipation capacity. The results are in good agreement with the numerical simulation results of Ansys. Finally, an example of an 11-span T-beam bridge with 20 m span is given. The nonlinear time-history analysis of this example is carried out by MIDAS CIVIL. The period of self-motion, the maximum displacement of beam and the internal force at the bottom of pier are compared and analyzed under different working conditions. The analysis results show that the new steel damper can reduce the period of self-motion, the displacement of beam and the displacement of expansion joint in bridge structure under earthquake. Improve the seismic performance of bridge structure, thus effectively protect the bridge structure.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.3

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