Research on ultimate moment of unbounded prestressed concrete pier

WANG Hui-li; JIANG Rong-bin; QIN Si-feng

doi:10.16411/j.cnki.issn1006-7736.2013.02.018

Journal of Dalian Maritime University >

2013 , Vol. 39 >Issue 2: 133 - 136

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2013.02.018

Original Paper

Research on ultimate moment of unbounded prestressed concrete pier

WANG Hui-li ,
JIANG Rong-bin ,
QIN Si-feng

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1. The Bridge Science Research Institute , Dalian University of Technology, Dalian 116023, China;2. Tongji Architectural Design Co.,Ltd.,Shanghai 200092, China;3. Research Center for Numerical Tests on Material , Dalian University, Dalian 116022, China

Received date: 2012-07-20

Online published: 2023-05-25

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Abstract

The calculation formula for the ultimate flexural capacity of the unbonded prestressed concrete bridge pier is derived, and the relationships between the ultimate bearing capacity and prestressed reinforcement area, the common reinforcement area, the strength of concrete and other influence factors are analyzed. The ultimate flexural capacity of the unbonded prestressed concrete bridge pier is studied based on the plastic-hinge method. Then the influence of different factors on the ultimate flexural capacity is analyzed. Results show that the increase in the area of common reinforcement and the strength of concrete can enhance the ultimate flexural capacity. Moreover, the ultimate bending moment increases first and then decreases with the increasing of the prestressed reinforcement. Thus, the most effective method to increase the ultimate flexural capacity of prestressed concrete bridge pier is to increase regular reinforcement ratio, but to control the number of prestressed reinforcement simultaneously.

Key words： unbounded; prestressed concrete; pier; ultimate flexural capacity

Cite this article

WANG Hui-li , JIANG Rong-bin , QIN Si-feng . Research on ultimate moment of unbounded prestressed concrete pier[J]. Journal of Dalian Maritime University, 2013 , 39(2) : 133 -136 . DOI: 10.16411/j.cnki.issn1006-7736.2013.02.018

References

［1］KWAN W P, Billing S L. Unbonded postensioned concrete bridge piersⅠ: monotonic and cyclic analyses ［J］. Journal of Bridge Engineering, 2003, 8(2):92-101.

［2］OU Y, WANG P, TSAI M, et al. Large-scale experimental study of precast segmental unbonded postensioned concrete bridge columns for seismic regions ［J］. Journal of Structural Engineering, 2010, 136(3):255-264.

［3］杨俊荣. 体外预应力装配式桥墩方案设计及有限元分析［D］. 武汉: 武汉理工大学, 2011. YANG Jun-rong. The schematic design and FEA of fabricated piers with external prestressing［D］. Wuhan: Wuhan University of Technology,2011.(in Chinese)

［4］DU J S, FTK A, CHEUNG Y K, et al. Ductility analysis of prestressed concrete beams with unbonded tendons［J］. Engineering Structures, 2008, 30(1):13-21.

［5］ZHANG Nan, FU C C, CHE Hui-min. Experiment and numerical modeling of prestressed concrete curved slab with spatial unbonded tendons［J］. Engineering Structures, 2011, 33(3):747-756.

［6］KIM K S, LEE D H. Nonlinear analysis method for continuous post-tensioned concrete members with unbonded tendons［J］. Engineering Structures, 2012, 40:487-500.

［7］杜进生，刘西拉. 基于结构变形的无黏结预应力筋应力变化研究［J］. 土木工程学报, 2003, 36(8):12-19. DU Jin-sheng, LIU Xi-la. Research on the variations of unbonded prestressed tendon stresses based upon the structural deformation［J］. China Civil Engineering Journal,2003,36(8):12-19. (in Chinese)

［8］汪训流. 配置高强钢绞线无黏结筋混凝土柱复位性能研究［D］. 北京: 清华大学, 2007. WANG Xun-liu.Research on re-centering capacity of reinforced concrete columns rinforced with unbonded high strength strands［D］. Beijing: Tsinghua University,2007.(in Chinese)

［9］TAM A, PNNELL F N. The ultimate moment of resistance of unbonded prestressed concrete beams［J］. Magazine of Concrete Research, 1976, 21(3):43-54.

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