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Simulation of multi-support depth-varying earthquake ground motions within heterogeneous onshore and offshore sites

Earthquake Engineering and Engineering Vibration 2018年第3期17卷 475-490页

作者： Li Chao Li Hongnan Hao Hong Bi Kaiming Tian Li State Key Laboratory of Coastal and Offshore Engineering Faculty of Infrastructure EngineeringDalian University of Technology School of Civil Engineering Shenyang Jianzhu University Center for Infrastructure Monitoring and Protection School of Civil and Mechanical EngineeringCurtin University School of Civil Engineering Guangzhou University School of Civil Engineering Shandong University

This paper presents a novel approach to model and simulate the multi-support depth-varying seismic motions（MDSMs） within heterogeneous offshore and onshore *** on 1 D wave propagation theory,the three-dimensional ground motion transfer functions on the surface or within an offshore or onshore site are derived by considering the effects of seawater and porous soils on the propagation of seismic P ***,the depth-varying and spatial variation properties of seismic ground motions are considered in the ground motion *** the obtained transfer functions at any locations within a site,the offshore or onshore depth-varying seismic motions are stochastically simulated based on the spectral representation method（SRM）.The traditional approaches for simulating spatially varying ground motions are improved and extended to generate MDSMs within multiple offshore and onshore *** simulation results show that the PSD functions and coherency losses of the generated MDSMs are compatible with respective target values,which fully validates the effectiveness of the proposed simulation *** synthesized MDSMs can provide strong support for the precise seismic response prediction and performance-based design of both offshore and onshore large-span engineering structures.

关键词： seismic motion simulation onshore and offshore sites ground motion spatial variation depth-varying motions transfer function

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