FE analyses and prediction of bursting forces in post-tensioned anchorage zone

다국어 초록 (Multilingual Abstract)

To improve the design equation for the evaluation of the bursting force in the post-tensioned anchorage zone, this paper presents the analyses and design of the post-tensioned (PT) anchorage zone on the basis of three dimensional (3D) finite element (FE) analyses. The structural behavior was investigated through linear elastic finite element analyses upon consideration of the change in design parameters such as the bearing plate size, the eccentricity, and the tendon inclination. Moreover, consideration of the duct hole, which causes an increase of the bursting stress with a change in its distribution along the anchorage zone as well, is emphasized. Since that an exact prediction of the bursting force is the primary interest in design practice, additional parametric analyses are carried out to evaluate the relative contribution of all design parameters in determining the bursting force, and a comparison with the design guidelines mentioned in AASHTO-LRFD has been provided. Finally, an improved design guideline that takes into account the influence by the duct hole is suggested.

참고문헌 (Reference)

1 김진국, "직사각형 정착장치 적용 바닥판 정착부의 거동특성 분석" 한국방재학회 14 (14): 67-76, 2014

2 최규형, "원형 정착구를 적용한 프리스트레스트 콘크리트 정착구역의 파열력에 관한 연구" 한국구조물진단유지관리공학회 19 (19): 3-12, 2015

3 Robinson, B., "Using steel fiber reinforced concrete in post-tensioned anchorage zones" 2009

4 Zhou, L., "Transverse bursting stresses due to horizontally curved tendons in the top slab of box girders" 21 (21): 1-10, 2016

5 Schlaich, J., "Toward a consistent design of structural concrete" 32 (32): 74-150, 1987

6 denColln Uijl, J.A., "Tensile stresses in the transmission zones of hollow-core slabs prestressed with pretensioned strands" 1983

7 O'Callaghan, M.R., "Tensile stresses in the end regions of pretensioned I-beams at release" The University of Texas 2008

8 Jo, B., "Structural behavior of cable anchorage zones in prestressed concrete cable-stayed bridge" 29 (29): 171-180, 2002

9 Oh, B.H., "Stress distribution and cracking behavior at anchorage zones in prestressed concrete members" 94 (94): 549-557, 1997

10 Oh, B.H., "Stress distribution and crack control at anchorage zones in prestressed concrete box-girder bridge members" 15 (15): 325-336, 1995

11 C. Liu, "Reinforcement design for the anchorage of externally prestressed bridges with “tensile stress region”" 사단법인 한국계산역학회 11 (11): 383-397, 2013

12 Haroon, S., "Posttensioned anchorage zone enhancement with fiber-reinforced concrete" 11 (11): 566-572, 2006

13 Sanders, D.H., "Post-tensioned anchorage zones with single straight concentric Anchorages" 94 (94): 146-158, 1997

14 최규천, "PSC I 거더의 정착부 파열거동 평가" 대한토목학회 30 (30): 329-336, 2010

15 Okumus, P., "Nonlinear finite element modeling of cracking at ends of pretensioned bridge girders" 40 : 267-275, 2012

16 Songwut, H., "Linear and nonlinear finite element analyses of anchorage zones in post-tensioned concrete structures" Virginia Polytechnic Institute and State University 2004

17 Sahoo, D.K., "Investigation of dispersion of compression in bottle-shaped struts" 106 (106): 178-186, 2009

18 He, Z., "Investigation of bursting forces in anchorage zones: compression-dispersion models and unified design equation" 16 (16): 820-827, 2011

19 Hou, D.W., "Investigation and improvement of strut-and-tie model for design of end anchorage zone in post-tensioned concrete structure" 136 : 482-494, 2017

20 Jin-Kook Kim, "Influence of steel fiber and reinforcing details on the ultimate bearing strength of the post-tensioning anchorage zone" 국제구조공학회 59 (59): 867-883, 2016

21 Zhou, L.Y., "Further investigation of transverse stresses and bursting forces in post-tensioned anchorage zones" 16 (16): 84-92, 2015

22 CEB-FIP Model Code, "Fib Model Code for Concrete Structures"

23 Kim, J.K., "Experimental evaluation of transfer length in pretensioned concrete beams using 2,400-MPa prestressed strands" 142 (142): 4016088-, 2016

24 Yun, Y.M., "Evaluation of ultimate strength of posttensioned anchorage zones" 3 (3): 149-159, 2005

25 Stone, W.C., "Behavior of post-tensioned girder anchorage zones" 29 (29): 64-109, 1984

26 Shen, S.L., "Assessment of internal forces for intermediate anchorage zone of post-tensioned concrete structure" 64 : 370-378, 2014

27 Fenwick, R.C., "Anchorage zones in prestressed concrete members" 38 (38): 77-89, 1986

28 Wollmann, G.P., "Anchorage zones in post-tensioned concrete structure" The University of Texas 1992

29 Yettram, A.L., "Anchorage zone stresses in post-tensioned uniform members with eccentric and multiple anchorages" 22 (22): 209-218, 1970

30 Breen, J.E., "Anchorage zone reinforcement for post-tensioned concrete girders" 1994

31 Wollmann, G.P., "Anchorage of external tendons in end diaphragms" 5 (5): 208-215, 2000

32 Burdet, O., "Analysis and design of anchorage zones in post-tensioned concrete bridges" The University of Texas 1990

33 M. Sonmez, "An investigation of anchorage to the edge of steel plates bonded to RC structures" 국제구조공학회 22 (22): 25-43, 2016

34 Douglas, D.J., "An examination of the stresses in the anchorage zone of a post-tensioned prestressed concrete beam" 12 (12): 9-18, 1960

35 "ACI 318, Building Code Requirements for Structural Concrete and Commentary" American Concrete Instituete 2014

36 Dassault Systemes, "ABAQUS Online User Manual Version 6.13-1" 2013

37 AASHTO LRFD, "AASHTO LRFD Bridge Design Specifications" 2012

38 Sundara Raja Iyengar, K.T., "A threedimensional stress distribution problem in the anchorage zone of a post-tensioned concrete beam" 18 (18): 75-84, 1966

39 Adeghe, L.N., "A finite element model for studying reinforced concrete detailing problems" The University of Toronto 1987

40 Al-saadoun, S.S., "A Three-dimensional photoelastic investigation of the stress distribution in the anchorage zone of post- tensioned beams" King Fahd University of Petroleum and Minerals 1980

41 Jian-Li Zhao, "A Design Approach for the Interior Anchorage Zone of Post-tensioned Concrete Structure" 대한토목학회 15 (15): 487-495, 2011