【摘要】 高层钢结构自身刚度较小,水平荷载起控制作用,设置水平加强层可以控制其变形。本文运用大型通用有限元软件ANSYS,建立三维计算模型,对北京某一高层钢结构进行动力特性分析。通过模态分析,得到了该结构的振型和周期,然后进行了振型分解反应谱分析,最后采用3条地震波,对该结构进行弹性时程分析。通过分析表明,水平加强层可以减小结构的最大位移和层间位移角,但加强层附近存在薄弱层,需要设计人员注意。用ANSYS作校核计算,能为结构抗震设计提供可靠的依据。更多还原

【Abstract】 Level load plays controlling actions in high-rise steel structure buildings for its low stiffness,and horizontal strengthened floors control its drifts.Based on finite element analysis(FEA) software ANSYS,the dynamic characteristics of a high-rise steel structure building is analyzed by building 3-D model.First,the structure own free-vibrations and periods are obtained from mode analysis.Then,analysis of response spectrum on the Seismic Properties is discussed.Elastic time history method is used to get whole analysis of the structure adopting three seismic waves finally.As a result,the maximal drift and interstorey drifts are reduced by horizontal strengthened floors,but there are unsubstantial floors around these floors,and it is necessary to pay attention for civil engineers.The credible aseismic gist is provided by ANSYS for checking the results.更多还原