J. Korean Soc. Hazard Mitig Search

CLOSE


Journal of the Korean Society of Hazard Mitigation 2014;14(3):133-142.
Published online June 30, 2014.
Evaluation of Shear Modulus of Sand Using Earthquake Records in Dynamic Centrifuge Tests
Evaluation of Shear Modulus of Sand Using Earthquake Records in Dynamic Centrifuge Tests
Ezequiel Q. Segismundo, Byung-Sik Lee, Nam-Ryong Kim, Yun Wook Choo
Abstract
Evaluation of the shear modulus of soil is of great importance in understanding both the fundamental soil behavior and its practical application in dynamic geotechnical problems as well as accurate analysis of seismic response of soil deposit and soil-structure interaction. There are traditionally several available techniques in measuring shear modulus of soil using laboratory tests. In this paper, calculation methods to evaluate shear modulus were reviewed from previously published works. A simple procedure was established using the previous equations. This procedure successfully obtained shear modulus of a sand deposit used for dynamic centrifuge tests. It also captured non-linear shear modulus with shear strain and effect of confining pressure. The shear modulus and normalized shear modulus versus shear strain curves from the experiment are compared with empirical curves proposed in literature. The shear modulus curves from the centrifuge tests are in reasonable agreement with the previous curves.
Key Words: Shear Modulus; Sand; Dynamic Centrifuge Tests; Acceleration Records
요지
흙의 전단탄성계수 산정은 기본적인 역학적인 거동의 이해뿐 아니라, 지진시 지반의 거동 및 지반-구조물 상호작용을 이해하는데 필수요소이다. 전통적으로 전단탄성계수는 다양한 실내실험에 의해 산정된다. 본 논문에서는 기존에 소개된 간단한 해석절차를 이용하여, 모래지반으로 수행된 동적원심모형실험에서 측정된 가속도기록으로부터 깊이별 비선형 전단탄성계수를 측정하였다. 측정된 전단탄성계수는 모래지반의 대표적인 특성인 전단변형률에 따른 비선형특성과 구속응력의 영향을 적절하게 측정하였다. 측정된 비선형 전단탄성계수는 기존 문헌과 비교되었고, 매우 근사하는 결과를 보였다.
핵심용어: 전단탄성계수; 모래; 동적원심모형실험; 가속도기록
TOOLS
Share :
Facebook Twitter Linked In Google+ Line it
METRICS Graph View
  • 685 View
  • 20 Download


ABOUT
ARTICLE CATEGORY

Browse all articles >

BROWSE ARTICLES
AUTHOR INFORMATION
Editorial Office
1010 New Bldg., The Korea Science Technology Center, 22 Teheran-ro 7-gil(635-4 Yeoksam-dong), Gangnam-gu, Seoul 06130, Korea
Tel: +82-2-567-6311    Fax: +82-2-567-6313    E-mail: master@kosham.or.kr                

Copyright © 2024 by The Korean Society of Hazard Mitigation.

Developed in M2PI

Close layer
prev next