Location
New York, New York
Date
16 Apr 2004, 1:30pm - 3:30pm
Abstract
Deep alluvial soil deposit of the Mississippi Embayment overlies the New Madrid Seismic Zone. A new nonlinear site response analysis model has been developed for wave propagation in deep soil deposits. The shape of the backbone curve of the model is described by the empirical unified formulas. Extended Masing criteria are used to represent hysteretic loading and unloading of soils. The new model takes into account the influence of the effective confining pressure on the shear modulus degradation and the viscous damping development in soil. The model is implemented into a two-dimensional finite element code in the time domain and calibrated with the recorded motion at Treasure Island during Loma Prieta Earthquake (1989). Results show that this model provides an acceptable outcome with simple input parameters. Finally, the new model is implemented into the site response analysis at a Missouri highway bridge site. The results show that the influence of the confining pressure is significant for the site response analysis of deep soil sediments.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2004 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Zheng, Wei and Luna, Ronaldo, "Nonlinear Site Response Analysis in the New Madrid Seismic Zone" (2004). International Conference on Case Histories in Geotechnical Engineering. 18.
https://scholarsmine.mst.edu/icchge/5icchge/session12/18
Nonlinear Site Response Analysis in the New Madrid Seismic Zone
New York, New York
Deep alluvial soil deposit of the Mississippi Embayment overlies the New Madrid Seismic Zone. A new nonlinear site response analysis model has been developed for wave propagation in deep soil deposits. The shape of the backbone curve of the model is described by the empirical unified formulas. Extended Masing criteria are used to represent hysteretic loading and unloading of soils. The new model takes into account the influence of the effective confining pressure on the shear modulus degradation and the viscous damping development in soil. The model is implemented into a two-dimensional finite element code in the time domain and calibrated with the recorded motion at Treasure Island during Loma Prieta Earthquake (1989). Results show that this model provides an acceptable outcome with simple input parameters. Finally, the new model is implemented into the site response analysis at a Missouri highway bridge site. The results show that the influence of the confining pressure is significant for the site response analysis of deep soil sediments.
