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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Steel frame with aseismic floor: From the viscoelastic decoupler model to the elastic structural response
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Steel frame with aseismic floor: From the viscoelastic decoupler model to the elastic structural response

机译：钢框与抗空地板：从粘弹性去耦模型到弹性结构反应

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By installing laminated viscoelastic materials (LVEM) between floor slabs and steel beams, the lateral motions of the floor and the frame are decoupled and the structural seismic response is mitigated. This paper presents a study of the elastic seismic performance of the steel frame with this floor system (hereafter termed the aseismic floor). First, the dynamic model of an LVEM under the combined precompression (vertical) and shear (lateral) is checked by experiment. The dynamic shearing behavior of the precompressed LVEM could be well simulated by the pure-shear model (without precompression) using the modified shear area-to-thickness ratio. The storage modulus and the loss factor of the precompressed LVEM could be deemed the same as those without precompression. Second, the time-varying dynamic properties of LVEM during the seismic response history are processed. In the processing, the transient frequency of LVEM is assumed to be equal to the fundamental frequency of the accordant conventional frame, and the dynamic property of the structure equipped with the aseismic floor is assumed stable throughout the response history. The accuracy of the processing is validated via numerical analyses. Third, based on the processed structural dynamic properties, the effectiveness of a complex Complete-Quadratic-Combination (CQC) method for predicting the peak structural seismic response is checked. The CQC method is recalibrated to account for the deviation between the pseudo- and relative velocities of the modal oscillators. The recalibrated CQC method could well predict the interstory drift of the frame and the shear deformation of the LVEM.
机译：通过在楼层板和钢梁之间安装层压粘弹性材料（LVEM），地板和框架的横向动作分离，并且结构地震反应被减轻。本文提出了利用该地板系统（以下称为抗空地板）钢框架弹性地震性能的研究。首先，通过实验检查在组合的预压缩（垂直）和剪切（横向）下LVEM的动态模型。使用改进的剪切区域到厚度比，通过纯剪切模型（无预压缩）井下压制Lvem的动态剪切行为。储存模量和前压制的LVEM的损耗因子可以被认为与没有预压缩的相同。其次，处理了地震响应历史期间LVEM的时变动态特性。在处理中，假设LVEM的瞬态频率等于致法常规框架的基频，并且在整个响应历史中，在整个响应历史中稳定地稳定地具有抗e地板的结构的动态特性。通过数值分析验证处理的准确性。第三，基于加工的结构动态特性，检查了复杂的完整二次组合（CQC）方法的有效性，用于预测峰结构地震响应的预测。 CQC方法被重新校准以解释模态振荡器的伪和相对速度之间的偏差。重新校准的CQC方法可以很好地预测框架的惰性漂移和LVEM的剪切变形。

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