设置金属阻尼器的高层钢框架结构减震性能研究

发布时间：2018-05-10 23:29

本文选题：金属阻尼器 + ANSYS有限元模拟　；参考：《兰州交通大学》2014年硕士论文

【摘要】：在工程结构减振控制领域里，消能减震技术占有很大比重，是土木工程结构抗震研究的主要方向之一，它已成为世界诸多专家学者在研究结构减震控制技术中的热点问题。金属阻尼器作为消能减震技术中一类有效的减震装置，具有取材、制作、安装简便，耐久性高，价格低等优点。金属阻尼器能为建筑结构提供附加刚度和附加阻尼，通过钢材良好的滞回性能消耗传入结构的能量，保护建筑结构的安全。由于其减震效果显著，因此被用于新建建筑的振动控制，也用于旧有建筑的维修加固。在研究的过程中，笔者做了如下工作：（1）首先本文介绍了结构振动控制的分类和目前金属阻尼器在国内外的发展状况，根据发展现状讨论本文将要研究的内容。（2）以大连理工大学李宏男教授等人研制的单圆孔钢阻尼器和双X型钢阻尼器为例，对单片金属阻尼器的耗能机理进行了数值仿真分析，对其滞回状况进行了研究分析，并与试验数据进行了对比。利用ANSYS有限元软件模拟单圆孔型钢阻尼器和双X型钢阻尼器的拟静力加载试验，，得到的滞回曲线与试验结果吻合良好，验证了有限元软件ANSYS模拟的可靠性，同时得到这两种阻尼器都具有较大的初始刚度和良好的耗能能力。分析了装设单圆孔型钢阻尼器的建筑结构的抗震性能，并用Combin40单元模拟单片金属阻尼器，取得良好的模拟效果。（3）运用有限元软件模拟计算时，选用El Centro波和Taft波和一条人工模拟的地震波，对安装金属阻尼器的钢框架结构进行多遇地震作用下的弹性时程分析和罕遇地震作用下的弹塑性时程分析，分析了装设金属阻尼器的高层钢框架结构的减震性能。研究表明，金属阻尼器用于建筑结构中，能有效地减弱地震响应，明显削弱结构最大水平位移、最大层间位移角、最大层加速度和最大层剪力等值。（４）对钢框架结构进行多遇地震作用下的弹性时程分析和罕遇地震作用下的弹塑性时程分析，对比分析了在结构不同位置设置金属阻尼器时的最大层位移、最大层间位移角、最大层速度、最大层加速度等值。讨论了其各种情况下的减震效果后，得出结论，仅需在结构下部75%左右楼层隔层设置金属阻尼器就可以在达到良好减震效果的同时取得较好的经济效益。
[Abstract]:In the field of vibration reduction and control of engineering structures, the energy dissipation and damping technology occupies a large proportion and is one of the main directions in the seismic research of civil engineering structures. It has become a hot issue of many experts and scholars all over the world in the research of structural damping control technology. As a kind of effective shock absorber in energy dissipation technology, metal damper has the advantages of material selection, fabrication, easy installation, high durability and low price. Metal dampers can provide additional stiffness and damping for building structures and consume the energy of incoming structures through good hysteretic performance of steel to protect the safety of building structures. It is used for vibration control of new buildings and maintenance and reinforcement of old buildings. In the course of the research, the author has done the following work: Firstly, the classification of structural vibration control and the development of metal dampers at home and abroad are introduced, and the contents of this paper are discussed. (2) taking the single circular steel damper and double X section steel damper developed by Professor Li Hongnan of Dalian University of Technology as examples, the energy dissipation mechanism of the single metal damper is numerically analyzed, and the hysteresis state of the damper is analyzed. The results are compared with the experimental data. ANSYS finite element software is used to simulate the quasi-static loading test of single circular section steel damper and double X section steel damper. The hysteretic curve obtained is in good agreement with the experimental results. The reliability of the finite element software ANSYS simulation is verified. At the same time, both dampers have high initial stiffness and good energy dissipation ability. The aseismic performance of building structures with steel dampers with single circular holes is analyzed. The Combin40 element is used to simulate monolithic metal dampers and good simulation results are obtained. The El Centro wave and Taft wave and a artificially simulated seismic wave are selected when using the finite element software to simulate the calculation. The elastic time-history analysis of steel frame structures with metal dampers and the elastic-plastic time-history analysis of steel frame structures with metal dampers under rare earthquake are carried out, and the seismic absorption performance of high-rise steel frame structures with metal dampers is analyzed. The results show that the metal dampers can effectively weaken the seismic response and weaken the maximum horizontal displacement, the maximum interstory displacement angle, the maximum story acceleration and the maximum shear force equivalent. 4) the elastic time-history analysis of steel frame structure under frequent earthquake and the elastic-plastic time-history analysis under rare earthquake are carried out, and the maximum layer displacement and the maximum interstory displacement angle are compared when metal dampers are installed in different positions of the structure. Maximum layer velocity, maximum layer acceleration equivalent. After discussing the effect of seismic absorption under various conditions, it is concluded that only 75% of the lower floors of the structure should be equipped with metal dampers, which can achieve good shock absorption effect and obtain better economic benefits at the same time.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.31;TU973.15

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