基于ANSYS的钢框架结构地震作用分析研究

发布时间：2018-04-03 07:15

本文选题：钢框架结构　切入点：ANSYS　出处：《河北工程大学》2014年硕士论文

【摘要】：钢结构以其抗震性能好等多方面的优点广泛被建筑结构行业取用，钢框架结构结合了钢结构抗震的优良性能与框架结构空间分配合理的优势，越来越广泛的被建筑结构所应用，本文利用有限元软件ANSYS对钢框架结构模型进行了地震作用分析。在明确了建筑结构进行地震响应分析的一些相关知识后，利用有限元软件ANSYS建立了二层、五层、八层三个仅有高宽比不同的钢框架模型，三个模型包含了低层、多层以及小高层三种类型的钢框架，对三个钢框架模型进行模态分析以及地震响应的有限元计算方法总结，再分别对三个钢框架利用地震波响应和地震谱响应两种方法进行ANSYS计算分析。得出以下结论。得到结构的固有频率，为后面地震谱响应的分析提供频率和周期的数据，并得到结构模态分析振型图，将三个模型模态分析得到的自振频率，取倒数转化为自振周期。进行对比发现楼层越高自振周期的范围越大，即越容易发生共振。模态分析是对钢框架结构地震作用研究的前提和必须的步骤。对重要的或带有研究性质的钢结构进行抗震计算，可以优先采取将地震作用按照地震波响应和按照地震谱响应来计算这两种方法，本文利用ANSYS对这两种方法的解题原理和方法步骤进行详细的描述，为解题提供思路和方法。得到地震波响应振型、位移响应曲线以及地震谱响应曲线，再对各自得到的结果图形和曲线进行提取数值、观察分析，得出最大变形、最大应力、最大位移等计算数据和结果，并对各个钢框架地震作用的结果进行分析。通过地震波响应分析数据发现随着楼层的增加，，钢框架的最大变形和最大应力也是逐级增大；通过地震谱响应分析数据再加上模态分析所得的频率值，可以说钢框架层数越高越容易发生共振。
[Abstract]:The steel structure with the advantages of good seismic performance and other aspects of the construction industry is widely used in steel frame structure with excellent performance and the structure of space steel structure seismic the reasonable distribution of the advantages, more and more widely used the structure of the building, this paper uses the finite element software ANSYS to model the steel frame structure earthquake analysis.
The building structure seismic response analysis of some relevant knowledge, established two layers, using the finite element software ANSYS five layer, eight layer only three high aspect ratio steel frame model is different, the three models include low layer, multilayer and high-rise three types of steel frame modal seismic response analysis and finite element calculation method of three steel frame models are summarized, and then were on the three steel frame with seismic response spectrum and seismic response analysis of ANSYS two methods. The following conclusions.
Get the natural frequency of the structure, analysis for the seismic spectrum response data provide the frequency and period, and the modal analysis modal diagram, three model modal analysis of natural frequency, reciprocal into vibration cycle. By comparing the higher floor vibration cycle range is bigger, the more prone to resonance. Modal analysis is the premise of seismic research of steel frame structure and the necessary steps.
The seismic calculation of important or with properties of steel structure, can take priority of earthquake response of seismic wave and seismic response spectrum is calculated in accordance with the two methods according to the steps of solving ANSYS principle and method of the two methods are described in detail, to provide ideas and methods for solving problems.
The seismic wave vibration, displacement response curves and seismic profiles, and graphics on their results and curve extraction numerical observation and analysis, get the maximum deformation, maximum stress, maximum displacement calculation data and experimental results, and the steel frame earthquake was analyzed.
Through the analysis of seismic wave response data, it is found that the maximum deformation and maximum stress of steel frames increase step by step with the increase of storeys. By analyzing the seismic spectrum response data and the frequency values obtained from modal analysis, it can be concluded that the higher the number of steel frames is, the easier the resonance is.

【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】：TU391

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