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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Spatial variation of seismic ground motion effects on nonlinear responses of cable stayed bridges considering different soil types
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Spatial variation of seismic ground motion effects on nonlinear responses of cable stayed bridges considering different soil types

机译：考虑不同土壤类型的地震地震动对斜拉桥非线性响应的空间变化

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The main objective of this study is providing comparative results of cable stayed bridges under non-uniform and uniform excitations and identifying the key parameters and elements for seismic design purposes. For this purpose, three cable stayed bridges were modeled in SAP2000 software and imposed to uniform and non-uniform displacement time series. Four different soil types were considered for generating sixteen different load cases. Twenty displacement time series, generated using spectral representation method, were considered in each load case for obtaining the statistical characteristics of responses. Bridge responses were obtained in terms of girder, pylon and the cables internal forces. Results of this research indicate that depending on the soil type beneath each support, the response of bridge may vary significantly. Deck and pylon stiffness are important parameters for describing the amount of girder moment or cables axial force amplification. Girder moment, cables axial force, pylons shear and pylons drifts are amplified up to 1.8, 1.4, 1.48 and 3.1 respectively in the worst load case.
机译：这项研究的主要目的是提供非均匀和一致激励下斜拉桥的比较结果，并确定用于地震设计目的的关键参数和要素。为此，在SAP2000软件中对三个斜拉桥进行了建模，并将其应用于统一和非统一的位移时间序列。考虑了四种不同的土壤类型，以产生十六种不同的荷载工况。在每种载荷情况下，考虑了使用频谱表示法生成的二十个位移时间序列，以获得响应的统计特征。根据梁，索塔和电缆的内力获得桥梁响应。这项研究的结果表明，根据每个支撑下面的土壤类型，桥梁的响应可能会发生显着变化。甲板和塔架刚度是描述梁力矩或电缆轴向力放大量的重要参数。在最坏的载荷情况下，梁的弯矩，电缆的轴向力，塔架的剪切力和塔架的位移分别放大到1.8、1.4、1.48和3.1。

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