TY - JOUR
T1 - Simulation of multi-support depth-varying earthquake ground motions within heterogeneous onshore and offshore sites
AU - Li, Chao
AU - Li, Hongnan
AU - Hao, Hong
AU - Bi, Kaiming
AU - Tian, Li
N1 - Funding Information:
support from the National Key R&D Program of China (Grant No. 2016YFC0701108) and the State Key Program of National Natural Science Foundation of China (Grant No. 51738007).
Funding Information:
Correspondence to: Li Hongnan, State Key Laboratory of Coastal and Offshore Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China Tel: +86 411 84709539 E-mail: [email protected] †Post-Doctoral Researcher;‡Professor; §Senior Lecturer Supported by: National Key R&D Program of China under Grant No. 2016YFC0701108 and the State Key Program of National Natural Science Foundation of China under Grant No. 51738007 Received April 5, 2018; Accepted June 1, 2018
Publisher Copyright:
© 2018, Institute of Engineering Mechanics, China Earthquake Administration and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - This paper presents a novel approach to model and simulate the multi-support depth-varying seismic motions (MDSMs) within heterogeneous offshore and onshore sites. Based on 1D 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 waves. Moreover, the depth-varying and spatial variation properties of seismic ground motions are considered in the ground motion simulation. Using 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 sites. The 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 method. The 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.
AB - This paper presents a novel approach to model and simulate the multi-support depth-varying seismic motions (MDSMs) within heterogeneous offshore and onshore sites. Based on 1D 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 waves. Moreover, the depth-varying and spatial variation properties of seismic ground motions are considered in the ground motion simulation. Using 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 sites. The 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 method. The 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.
KW - depth-varying motions
KW - ground motion spatial variation
KW - onshore and offshore sites
KW - seismic motion simulation
KW - transfer function
UR - http://www.scopus.com/inward/record.url?scp=85049883905&partnerID=8YFLogxK
U2 - 10.1007/s11803-018-0456-7
DO - 10.1007/s11803-018-0456-7
M3 - Journal article
AN - SCOPUS:85049883905
SN - 1671-3664
VL - 17
SP - 475
EP - 490
JO - Earthquake Engineering and Engineering Vibration
JF - Earthquake Engineering and Engineering Vibration
IS - 3
ER -