Nonlinear numerical method for earthquake site response analysis II — case studies

This paper presents two numerical case studies of medium and strong motion events, namely Loma-Prieta 1989 and Hyogoken-Nambu (Kobe) 1995. These simulations were performed using CyberQuake model. The cyclic elastoplastic constitutive model is fully detailed in the companion paper. Through these case studies, we demonstrate the importance of using appropriate constitutive modelling when the part played by nonlinear phenomena is preponderant. The need to account for 3D kinematics (i.e. the three components of the input motion), is also demonstrated, even though a 1D geometry is considered, as the plastic coupling existing between components of motion during the earthquake, strongly affects the seismic soil response.

[1]  T. J. Powers,et al.  Seismic velocities and geologic logs from borehole measurements at eight strong-motion stations that recorded the 1989 Loma Prieta, California, earthquake , 1992 .

[2]  Kenneth H. Stokoe,et al.  Liquefaction Evaluation of Densified Sand at Approach to Pier 1 on Treasure Island, California, Using SASW Method | NIST , 1998 .

[3]  Youssef M A Hashash,et al.  Viscous damping formulation and high frequency motion propagation in non-linear site response analysis , 2002 .

[4]  Fernando Lopez-Caballero,et al.  Global Methodology for Soil Behavior Identification and its Application to the Study of Site Effects , 2001 .

[5]  Anthony F. Shakal,et al.  RECENT DATA RECORDED FROM DOWNHOLE GEOTECHNICAL ARRAYS , 2000 .

[6]  Yoshinori Iwasaki,et al.  STRONG MOTION RECORDS AT KOBE PORT ISLAND , 1996 .

[7]  Ahmed Elgamal,et al.  LOTUNG DOWNHOLE ARRAY. I: EVALUATION OF SITE DYNAMIC PROPERTIES , 1995 .

[8]  Bagher Mohammadioun,et al.  Nonlinear Response of Soils to Horizontal and Vertical Bedrock Earthquake Motion , 1997 .

[9]  Carlos E. Ventura,et al.  Analysis of ground motions at Treasure Island site during the 1989 Loma Prieta earthquake , 1993 .

[10]  国生 剛治,et al.  Cyclic triaxial test of dynamic soil properties for wide strain range. , 1980 .

[11]  Mourad Zeghal,et al.  LIQUEFACTION OF RECLAIMED ISLAND IN KOBE, JAPAN , 1996 .

[12]  Non-linear site response simulations in Chang-Hwa region during the 1999 Chi-Chi earthquake, Taiwan. , 2006 .

[13]  V. Drnevich,et al.  SHEAR MODULUS AND DAMPING IN SOILS: DESIGN EQUATIONS AND CURVES , 1972 .

[14]  M. Power,et al.  Development of Shear Modulus Reduction Curves Based on Lotung Downhole Ground Motion Data , 1991 .

[15]  Kuo-Liang Wen,et al.  Seismological evidence for nonlinear elastic ground behavior during large earthquakes , 1995 .

[16]  Numerical Simulation of Liquefaction-Induced Deformations , 2000 .

[17]  Jean Benoît,et al.  Deep Instrumentation Array at Treasure Island Naval Station , 1992 .

[18]  H. Seed.  Soil moduli and damping factors for dynamic response analyses , 1970 .

[19]  R. Dobry,et al.  Effect of Soil Plasticity on Cyclic Response , 1991 .