[1] Chen Lihua, Li Aiqun, Lou Yu, et al. Ultimate negative bending-moment capacityof outer-plated steel-concrete continuous composite beams [J]. Journal of Southeast University (English Edition), 2009, 25 (1): 89-93. [doi:10.3969/j.issn.1003-7985.2009.01.019]

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Ultimate negative bending-moment capacityof outer-plated steel-concrete continuous composite beams()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

25

Issue:

2009 1

Page:

89-93

Research Field:

Civil Engineering

Publishing date:

2009-03-30

Info

Title:

Ultimate negative bending-moment capacityof outer-plated steel-concrete continuous composite beams

Author(s):

Chen Lihua¹;  2;  Li Aiqun¹;  Lou Yu³;  Li Peibin³

¹School of Civil Engineering, Southeast University, Nanjing 210096, China
²College of Civil and Architectural Engineering, Hefei University of Technology, Hefei 230009, China
³ China Electronics Engineering Design Institute, Beijing 100840, China

Keywords:

outer-plated steel-concrete composite beam;  continuous beam;  negative moment;  bending-moment bearing capacity

PACS:

TU317.1

DOI:

10.3969/j.issn.1003-7985.2009.01.019

Abstract:

Static load tests and bearing capacity analyses are carried out for two outer-plated steel-concrete continuous composite beams.The load-deflection curve and the load-strain curve of specimens are obtained and analyzed.The test results indicate that effective cooperation can be achieved by the shear-resistant connection between the reinforcement in the negative moment area and the outer-plated steel beam, and the overall working performance of the composite beams is favorable.At the load-bearing limiting state, the plastic strain on the maximum negative and positive moment section becomes fully developed so as to form relatively ideal plastic hinges.With the increase in the reinforcement ratio, the moment-carrying capacity of the composite beams improves significantly, but the ductility of the beams and the rotation ability of the plastic hinges decrease.The formulae for calculating the limit bending capacity in the negative moment area of outer-plated steel-concrete composite beams are proposed based on the test data.The calculated results agree well with the test results.

References:

[1] Chen Lihua.Experimental investigation on the new-type outer-plated steel-concrete continuous composite beams and joints[D].Nanjing:School of Civil Engineering of Southeast University, 2006.(in Chinese)
[2] Du Derun, Li Aiqun, Chen Lihua.Experimental study on steel encased concrete composite beam[J].Building Structure, 2007, 36(4):64-67.(in Chinese)
[3] Xiao Hui, Li Aiqun, Du Derun.Experimental study on ultimate flexural capacity of steel encased concrete composite beams[J].Journal of Southeast University:English Edition, 2005, 21(2):191-196.
[4] Zhu Pinru, Gao Xiangdong, Wu Zhensheng.Research on plastic hinge behaviour and internal moment redistribution in steel concrete continuous composite beam[J].Journal of Building Structures, 1990, 11(6):26-37.(in Chinese)
[5] Wang Ting, Nie Jianguo, Li Bingyi, et al.Study on ultimate flexural capacity of composite steel-concrete beams with profiled sheeting[J].Journal of Building Structures, 2001, 22(2):61-65.(in Chinese)
[6] Oehlers D J, Nguyen N T, Ahmed M, et al.Partial interaction in composite steel and concrete beams with full shear connection[J].Journal of Constructional Steel Research, 1997, 41(2/3):235-248.
[7] Fabbrocino G, Manfredi G, Cosenza E.Ductility of composite beams under negative bending:an equivalence index for reinforcing steel classification[J].Journal of Constructional Steel Research, 2001, 57(2):185-202.
[8] Fabbrocino G, Manfredi G, Cosenza E.Analysis of continuous composite beams including partial interaction and bond[J].Journal of Structural Engineering, 2000, 126(12):1288-1294.
[9] Manfredi G, Fabbrocino G, Cosenza E.Modeling of steel-concrete composite beams under negative bending[J].Journal of Engineering Mechanics, 1999, 125(6):654-662.

Memo

Memo:

Biographies: Chen Lihua(1972—), female, doctor;Li Aiqun(corresponding author), male, doctor, professor, aiqunli@sina.com.
Citation: Chen Lihua, Li Aiqun, Lou Yu, et al.Ultimate negative bending-moment capacity of outer-plated steel-concrete continuous composite beams[J].Journal of Southeast University(English Edition), 2009, 25(1):89-93.

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