All Issue

2020 Vol.36, Issue 12 Preview Page

Research Article

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

비선형 지반구성모델의 비교를 통한 전단강도 보정이 부지응답해석에 미치는 영향 평가

Muhammad Aaqib1
,
Duhee Park2†
,
Hansup Kim3
,
Muhammad Bilal Adeel1
,
Zubair Ahmed Nizamani1
무하마드 아킵1
,
박 두희2†
,
김 한섭3
,
무하마드 빌랄 아딜1
,
주바이르 아흐메드 니자마니1
1Ph.D. Student, Dept. of Civil and Env. Engr., Hanyang Univ.
2Member, Prof., Dept. of Civil and Env. Engr., Hanyang Univ.
3Post-Doctoral Researcher, Dept. of Civil and Env. Engr., Hanyang Univ.
1비회원, 한양대학교 대학원 건설환경공학과 박사과정
2정회원, 한양대학교 건설환경공학과 교수
3비회원, 한양대학교 건설환경공학과 박사후연구원
*dpark@hanyang.ac.kr
31 December 2020. pp. 77-86
PDF XML Citation
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

본 논문에서는 얕은 기반암 심도 및 지진 위험도가 상대적으로 낮은 지역에서 부지의 고유주기와 입력지진파의 평균주기의 영향에 따른 전단강도 보정의 필요성을 평가하였다. 이를 위해 일반적으로 널리 사용되는 Modified Kondner-Zelasko(MKZ) 모델과 함께 미소변형률뿐만 아니라 대변형률 영역에서의 응력-변형률 거동을 모사할 수 있는 General Quadratic/Hyperbolic(GQ/H) 모델을 사용하였다. 6개 부지의 다운홀 시험 자료와 평균주기가 다른 3개의 입력지진파를 사용하여 1차원 부지응답해석을 수행하였다. 그 결과, 입력지진파의 평균주기뿐만 아니라 부지의 고유주기에 따라 전단강도 보정 적용 유무에 따른 해석 결과의 차이가 발생했다. 부지의 고유주기의 영향을 파악하기 위해 유효최대지반가속도, 최대전단변형률 및 증폭계수와의 상관관계를 분석하였다. 분석 결과, 부지의 고유주기가 길고 연약한 지반일수록 그 차이가 더욱 커지는 것을 확인하였다.

References
1
Aaqib, M., Sadiq, S., Park, D., Hashash, Y.M.A., and Pehlivan, M. (2018), "Importance of Implied Strength Correction for 1D Site Response at Shallow Sites at a Moderate to Low Seismicity Region", Geotechnical Special Publication, Vol.2018-June, Issue GSP 291, pp.445-453. 10.1061/9780784481462.043
2
Borcherdt, R.D. (1994), "Estimates of Site-dependent Response Spectra for Design (Methodology and Justification)", Earthquake Spectra, Vol.10, No.4, pp.617-653. 10.1193/1.1585791
3
Darendeli, M.B. (2001), Development of a New Family of Normalized Modulus Reduction and Material Damping Curves, Ph.D. thesis, University of Texas at Austin.
4
Dobry, R., Ramos, R., and Power, M.S. (1998), Site Factors and Site Categories in Seismic Codes, Technical Report MCEER: US Multidisciplinary Center for Earthquake Engineering Research (MCEER).
5
Groholski, D.R., Hashash, Y.M.A., Musgrove, M., Harmon, J., and Kim, B. (2015), "Evaluation of 1‐D Non‐linear Site Response Analysis using a General Quadratic/Hyperbolic Strength‐controlled Constitutive Model", 6ICEGE: 6th International Conference on Earthquake Geotechnical Engineering, Christchurch, New Zealand.
6
Groholski, D.R., Hashash, Y.M.A., Kim, B., Musgrove, M., Harmon, J., and Stewart, J.P. (2016), "Simplified Model for Small-strain Nonlinearity and Strength in 1D Seismic Site Response Analysis", Journal of Geotechnical and Geoenvironmental Engineering, Vol.142, No.9, pp.04016042. 10.1061/(ASCE)GT.1943-5606.0001496
7
Hashash, Y.M.A. and Park, D. (2001), "Non-linear One-dimensional Seismic Ground Motion Propagation in the Mississippi Embayment", Engineering Geology, Vol.62, No.1-3, pp.185-206. 10.1016/S0013-7952(01)00061-8
8
Hashash, Y.M.A., Musgrove, M.I., Harmon, J.A., Ilhan, O., Xing, G., Groholski, D.R., Phillips, C.A., and Park, D. (2020), DEEPSOIL 7.0, User Manual, Urbana, IL, Board of Trustees of University of Illinois at Urbana-Champaign.
9
KIGAM (2016), Korea Institute of Geoscience and Mineral Resources [Internet]. Available from: http://www.kigam.re.kr/.
10
Kim, D.-S., Manandhar, S., and Cho, H.-I. (2018), "New Site Classification System and Design Response Spectra in Korean Seismic Code", Earthquakes and Structures, Vol.15, No.1, pp.1-8.
11
Kramer, S.L. (1996), Geotechnical Earthquake Engineering, Pearson Education India.
12
Kwok, A.O.L, Stewart, J.P., Hashash, Y.M.A., Matasovic, N., Pyke, R., Wang, Z., and Yang, Z. (2007), "Use of Exact Solutions of Wave Propagation Problems to Guide Implementation of Nonlinear Seismic Ground Response Analysis Procedures", Journal of Geotechnical and Geoenvironmental Engineering, Vol.133, No.11, pp.1385-1398. 10.1061/(ASCE)1090-0241(2007)133:11(1385)
13
Manandhar, S., Cho, H.-I., and Kim, D.-S. (2017), "Site Classification System and Site Coefficients for Shallow Bedrock Sites in Korea", Journal of Earthquake Engineering, Vol.22, No.7, pp.1259-1284. 10.1080/13632469.2016.1277570
14
Matasovic, N. (1993), Seismic Response of Composite Horizontally-layered Soil Deposits, Ph.D. thesis, University of California at Los Angeles.
15
MOLIT (2018), General Seismic Design (KDS 17 00 00: 2018), Ministry of Land, Infrastructure and Transportation (in Korean).
16
PEER ground motion database (2013), University of California, Berkeley [Internet], Available from: https://ngawest2.berkeley.edu/.
17
Phillips, C. and Hashash, Y.M.A. (2009), "Damping Formulation for Nonlinear 1D Site Response Analyses", Soil Dynamics and Earthquake Engineering, Vol.29, No.7, pp.1143-1158. 10.1016/j.soildyn.2009.01.004
18
Rathje, E.M., Faraj, F., Russell, S., and Bray, J.D. (2004), "Empirical Relationships for Frequency Content Parameters of Earthquake Ground Motions", Earthquake Spectra, Vol.20, No.1, pp.119-144. 10.1193/1.1643356
19
Shi, J. and Asimaki, D. (2017), "From Stiffness to Strength: Formulation and Validation of a Hybrid Hyperbolic Nonlinear Soil Model for Site-response Analyses", Bulletin of the Seismological Society of America, Vol.107, No.3, pp.1336-1355. 10.1785/0120150287
20
Sun, C.G., Cho, C.S., Son, M., and Shin, J.S. (2013), "Correlations between Shear Wave Velocity and In-situ Penetration Test Results for Korean Soil Deposits", Pure and Applied Geophysics, Vol.170, No.3, pp.271-281. 10.1007/s00024-012-0516-2
21
Wolff, T.F. (1989), "Pile Capacity Prediction using Parameter Functions", Predicted and Observed Axial Behavior of Piles: Results of a Pile Prediction Symposium, pp.96-106.
22
Yee, E., Stewart, J.P., and Tokimatsu, K. (2013), "Elastic and Large- strain Nonlinear Seismic Site Response from Analysis of Vertical Array Recordings", Journal of Geotechnical and Geoenvironmental Engineering, Vol.139, No.10, pp.1789-1801. 10.1061/(ASCE)GT.1943-5606.0000900
Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 36
  • No :12
  • Pages :77-86
  • Received Date : 2020-11-26
  • Revised Date : 2020-12-16
  • Accepted Date : 2020-12-16
  • DOI :https://doi.org/10.7843/kgs.2020.36.12.77
Journal Informaiton Journal of the Korean Geotechnical Society Journal of the Korean Geotechnical Society
Archives
: Vol.23~28 (2007~2012)
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close