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http://dx.doi.org/10.7843/kgs.2020.36.12.77

Evaluation of the Influence of Shear Strength Correction through a Comparative Study of Nonlinear Site Response Models  

Aaqib, Muhammad (Dept. of Civil and Env. Engr., Hanyang Univ.)
Park, Duhee (Dept. of Civil and Env. Engr., Hanyang Univ.)
Kim, Hansup (Dept. of Civil and Env. Engr., Hanyang Univ.)
Adeel, Muhammad Bilal (Dept. of Civil and Env. Engr., Hanyang Univ.)
Nizamani, Zubair Ahmed (Dept. of Civil and Env. Engr., Hanyang Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.36, no.12, 2020 , pp. 77-86 More about this Journal
Abstract
In this study, the importance of implied strength correction for shallow depths at a region of moderate to low seismicity with primary focus on its effect upon site natural period and mean period of the ground motion is investigated. In addition to the most commonly used Modified Kondner-Zelasko (MKZ) model, this paper uses a quadratic/hyperbolic (GQ/H) model that can capture the stress - strain response at large strains as well as small strain stiffness dependence. A total of six site profiles by downhole tests are used and 1D site response analyses are performed using three input motions with contrasting mean periods. The difference between non-corrected and corrected analyses is conditional on the site period as well as mean ground motion period. The effect of periods is analyzed by correlating them with the effective peak ground acceleration, maximum shear strains and amplification factors. The comparative study reveals that the difference is more prominent in soft sites with long site periods. Insignificant differences are observed when soil profiles are subjected to ground motion with very short mean period.
Keywords
General Quadratic/Hyberbolic; Mean period of the ground motion; Modified Kondner-Zelasko; Shear strength correction; Site natural period; Site response analysis;
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Times Cited By KSCI : 2  (Citation Analysis)
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