ANSYS对钢框架结构地震谱响应的计算分析

本文采用ANSYS有限元分析法，进行框架结构地震作用按照地震谱响应计算的分析，以某十层钢框架结构为例，进行模态求解，谱响应分析，模态扩展，模态合并以及时程分析的模拟。结果表明，模态分析得到钢框架的固有频率和振型，可以在设计阶段使结构的自振周期远离主振周期；谱响应分析得到地震谱响应曲线和响应振型，将两者结合考虑可发现发生共振情况的振型和频率，从而测试结构在地震时抗共振的能力，避免钢框架结构在发生地震时由于共振而产生的破坏。

Computational analysis of steel frame structures earthquake spectrum action by using ANSYS

This article uses the ANSYS finite element analysis. Analysis of frame structures under earthquake action in accordance with the seismic spectral response. With a 10 layer of steel frame structure as an example the modal solving spectral response analysis, modal expansion, modal mergers and schedule analysis of the simulation. The results show that the modal analysis to obtain the natural frequencies and mode shapes of the steel frame. The vibration period of the structure away from the main vibration cycle at the design stage and earthquake spectral response curve and response modal spectral response analysis. Consider the combination of the two can found that the vibration and resonance frequency. Thus can avoid the steel frame structure during an earthquake due to damage as a result of the resonance.