단일 현장타설말뚝의 가상고정점 설계 및 분리해석 적용성 평가 = Application of Virtual Fixed Point Theory and Discrete Analysis for Pile Bent Structures

다국어 초록 (Multilingual Abstract)

In this study, the virtual fixed point analysis and 3D full-modeling analysis for pile bent structures are conducted by considering various influencing factors and the applicability of the virtual fixed point theory is discussed. Also, a discrete analysis calculating separately both the superstructure and substructure of pile bent structures is performed on the basis of an equivalent base spring model by taking into account the major influencing parameters such as soil conditions, combined loading and pile diameter. The results show that the settlement and lateral deflection of the virtual fixed point theory are smaller than those of 3D full-modeling analysis. On the other hand, the virtual fixed point analysis overestimates the axial force and bending moment compared with 3D full-modeling analysis. It is shown that the virtual fixed point analysis cannot adequately predict the real behavior of pile bent structures. It is also found that discrete analysis gives similar results of lateral deflection and bending moment to those of unified analysis. Based on this study,it is found that discrete analysis considering column-pile interaction conditions is capable of predicting reasonably well the behavior of pile bent structures. It can be effectively used to perform a more economical design of pile bent structures.

참고문헌 (Reference)

1 조재연, "말뚝지지 전면기초의 3차원 근사해석기법 개발" 한국지반공학회 28 (28): 67-78, 2012

2 김재영, "단일 현장타설말뚝의 간편해석 및 최소 철근비 분석" 한국지반공학회 27 (27): 33-43, 2011

3 AASHTO, "Standard Specification for Highway Bridges" American Association of State Highway and Transportation Official 2002

4 Jeong, S. S., "Simplified Analysis of Mega Foundations for Super Tall Buildings" 2011

5 Jeong, S. S., "Simplified Analysis Algorithm of Raft & Pile-raft Foundation for High-rise Buildings" 2011

6 Hutchinson, T. C., "Seismic Design and Retrofit of Bridges" John Wiley & Sons 2002

7 Son, H. S., "Seismic Analysis and Reinforcement Details of Integral Pile Shaft-Column Foundations" 300-307, 2006

8 Ahn, S. Y., "Proposed New Design Method of the Pile Bent Structure considering plastic hinge" Yonsei University 2010

9 Lee, J. H., "New Concrete Bridge Column System" 16 (16): 24-30, 2004

10 Han, K. T., "Load-Settlement Behavior of the Drilled Shafts subjected to Bi-Directional Loading" Yonsei University 2008

11 Kerop, D. J., "Interaction between soil and full scale drilled shaft under cyclic lateral load" University of California 2001

12 Chai, Y. H., "Flexural strength and ductility of extended pile-shafts. I : analytical model" 128 (128): 586-594, 2002

13 Reese, L. C., "Drilled Shaft Manual" U. S. Department of Transportation 1977

14 FHWA, "Drilled Shaft" National Highway Institute 1987

15 Son, H. S., "Design of Single Column Drilled Pier Foundation in Incheon Bridge Viaduct" 959-962, 2005

16 Jeon, K. S., "Design and construction of single drilled shaft foundation" 86-100, 2006

17 Jeon, K. S., "Design Criteria for Pile Bent Structure, Vol.68"

18 Ministry of Land, Infrastructure and Transport, "Design Criteria for Highway Bridges (in Korean)"

19 John, W., "Cyclic Large Deflection Testing of Shaft Bridges" University of California 2001

20 Song, H. J., "Analysis of Single Shaft/Column of Light Rail Transit Structure subjected to Lateral Loading" Yonsei University 2008

21 Jeong, S. S., "Analysis of Pile-Bent (CIDH Shaft/Column) structure subjected to lateral loading" 3968-3971, 2005

22 Kim, S. K., "A Case Study on Horizontal Displacement Characteristics for Single Drilled Shaft Foundation" 2017-2020, 2008