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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >A pushover procedure for seismic assessment of buildings with bi-axial eccentricity under bi-directional seismic excitation
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A pushover procedure for seismic assessment of buildings with bi-axial eccentricity under bi-directional seismic excitation

机译：双向地震激励下双向偏心建筑物抗震评估的推覆程序

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摘要

A new modal pushover procedure is proposed for seismic assessment of asymmetric-plan buildings under bi-directional ground motions. Although the proposed procedure is a multi-mode procedure and the effects of the higher and torsional modes are considered, the simplicity of the pushover procedure is kept and the method requires only a single-run pushover analysis for each direction of excitation. The effects of the frequency content of a specific ground motion and the interaction between modes at each direction are all considered in the single-run pushover analysis. For each direction, the load pattern is derived from the combined modal story shear and torque profiles. The pushover analysis is conducted independently for each direction of motion (x and y), and then the responses due to excitation in each direction are combined using SRSS (Square Roots of Sum of Squares) combination rule. Accuracy of the proposed procedure is evaluated through two low- and medium-rise buildings with 10% two-way eccentricity under different pairs of ground motions. The results show promising accuracy for the proposed method in predicting the peak seismic responses of the sample buildings. (C) 2014 Elsevier Ltd. All rights reserved.
机译：提出了一种新的模态推覆程序，用于双向地震动下非对称平面建筑物的地震评估。尽管所提出的过程是一种多模式过程，并且考虑了较高和扭转模式的影响，但仍保持了推覆过程的简单性，并且该方法仅需要针对每个激励方向进行单次推覆分析。单次推覆分析中都考虑了特定地面运动的频率含量的影响以及每个方向上的模式之间的相互作用。对于每个方向，载荷模式是从组合的模态层剪切和扭矩曲线得出的。对于每个运动方向（x和y）独立进行推覆分析，然后使用SRSS（平方和的平方根）组合规则组合每个方向上的激励引起的响应。通过在两个不同的地面运动对下，双向偏心率均为10％的两座低层和中层建筑，评估了所提出程序的准确性。结果表明，该方法在预测样本建筑物的峰值地震响应中具有良好的准确性。 （C）2014 Elsevier Ltd.保留所有权利。

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