Harmonic-Modal Hybrid Reduced Order Model for the Efficient Integration of Non-Linear Soil Dynamics

被引:10
作者
Germoso, Claudia [1 ]
Duval, Jean Louis [2 ]
Chinesta, Francisco [2 ,3 ]
机构
[1] Inst Tecnol Santo Domingo INTEC, Ave Los Proceres, Santo Domingo 10602, Dominican Rep
[2] ESI Grp, 2 Rue Saarinen, F-94513 Rungis, France
[3] Arts & Metiers Inst Technol, PIMM Lab, ESI Grp Chair, 151 Blvd Hop, F-75013 Paris, France
来源
APPLIED SCIENCES-BASEL | 2020年 / 10卷 / 19期
关键词
nonlinear soil behavior; harmonic analysis; modal analysis; real-time dynamics; proper generalized decomposition;
D O I
10.3390/app10196778
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Nonlinear behavior of soils during a seismic event has a predominant role in current site response analysis. Soil response analysis, and more concretely laboratory data, indicate that the stress-strain relationship of soils is nonlinear and exhibits hysteresis. An equivalent linearization method, in which non-linear characteristics of shear modulus and damping factor of soils are modeled as equivalent linear relations of the shear strain is usually applied, but this assumption, however, may lead to a conservative approach of the seismic design. In this paper, we propose an alternative analysis formulation, able to address forced response simulation of soils exhibiting their characteristic nonlinear behavior. The proposed approach combines ingredients of modal and harmonic analyses enabling efficient time-integration of nonlinear soil behaviors based on the offline construction of a dynamic response parametric solution by using Proper Generalized Decomposition (PGD)-based model order reduction technique.
引用
收藏
页数:15
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