[1] He Zhenjun, Song Yupu,. Strength regularity and failure criterion of plain HSHPCunder biaxial compression after exposure to high temperatures [J]. Journal of Southeast University (English Edition), 2008, 24 (2): 206-211. [doi:10.3969/j.issn.1003-7985.2008.02.017]

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Strength regularity and failure criterion of plain HSHPCunder biaxial compression after exposure to high temperatures()

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

Volumn:

24

Issue:

2008 2

Page:

206-211

Research Field:

Materials Sciences and Engineering

Publishing date:

2008-06-03

Info

Title:

Strength regularity and failure criterion of plain HSHPCunder biaxial compression after exposure to high temperatures

Author(s):

He Zhenjun;  Song Yupu

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China

Keywords:

high-strength high-performance concrete(HSHPC);  high temperatures;  stress ratio;  uniaxial and biaxial compressive strength;  failure criterion

PACS:

TU528.31;TU317+.3

DOI:

10.3969/j.issn.1003-7985.2008.02.017

Abstract:

Biaxial compression tests are performed on 100 mm×100 mm×100 mm cubic specimens of plain high-strength high-performance concrete(HSHPC)at seven kinds of stress ratios, σ₂2:σ₃3=0:-1, -0.20:-1, -0.30:-1, -0.40:-1, -0.50:-1, -0.75:-1, and -1.00:-1 after exposure to normal and high temperatures of 20, 200, 300, 400, 500 and 600 ℃, using a large static-dynamic true triaxial machine.Friction-reducing pads are three layers of plastic membranes with glycerine in-between for the compressive loading plane.Failure modes of the specimens are described.The two principally static compressive strengths are measured.The influences of the temperatures and stress ratios on the biaxial strengths of HSHPC after exposure to high temperatures are also analyzed.The experimental results show that the uniaxial compressive strength of plain HSHPC after exposure to high temperatures does not decrease completely with the increase in temperature; the ratios of the biaxial to its uniaxial compressive strengths depend on the stress ratios and brittleness-stiffness of HSHPC after exposure to different high temperatures.The formula of the Kupfer-Gerstle failure criterion modified with the temperature and stress ratio parameters for plain HSHPC is proposed.

References:

[1] Li Min, Qian Chunxiang, Sun Wei.Mechanical properties of high-strength concrete after fire [J].Cement and Concrete Research, 2004, 34(6):1001-1005.
[2] Peng Gaifei, Yang Wenwu, Zhao Jie, et al.Explosive spalling and residual mechanical properties of fiber-toughened high-performance concrete subjected to high temperatures [J].Cement and Concrete Research, 2006, 36(4):723-727.
[3] Kupfer H.Behavior of concrete under biaxial stresses [J].ACI Journal, 1969, 66(8):656-666.
[4] Husem Metin, Gozutok Serhat.The effects of low temperature curing on the compressive strength of ordinary and high performance concrete [J].Construction and Building Materials, 2005, 19(1):49-53.
[5] Lu Xiaobin, Thomas Hsu Cheng-Tzu.Behavior of high strength concrete with and without steel fiber reinforcement in triaxial compression [J].Cement and Concrete Research, 2006, 36(9):1679-1685.
[6] Luo X, Sun W, Chan Y N.Residual compressive strength and microstructure of high performance concrete after exposure to high temperature [J].Materials and Structures/Matériaux et Constructions, 2000, 33(6):294-298.
[7] Chan Sammy Y N, Peng Gaifei, Chan John K W.Comparison between high strength concrete and normal strength concrete subjected to high temperature [J].Materials and Structures/Matériaux et Constructions, 1996, 29(12):616-619.
[8] The High-strength High-performance Concrete Committee of the Chinese Civil Engineering Society.Guide for structural design and construction of high-strength concrete[M].Beijing:China Architecture and Building Press, 2001.(in Chinese)
[9] Qin Likun, Song Yupu, Zhang Zhong, et al.The research on strength and deformation of plain concrete under biaxial compression after high temperatures [J].Journal of Dalian University of Technology, 2005, 45(1):113-117.(in Chinese)
[10] Lee Sangkeun, Song Youngchul, Han Sanghoon.Biaxial behavior of plain concrete of nuclear containment building [J].Nuclear Engineering and Design, 2004, 227(2):143-153.

Memo

Memo:

Biographies: He Zhenjun(1975—), male, graduate;Song Yupu(corresponding author), male, doctor, professor, syupu@dlut.edu.cn.
Citation: He Zhenjun, Song Yupu.Strength regularity and failure criterion of plain HSHPC under biaxial compression after exposure to high temperatures[J].Journal of Southeast University(English Edition), 2008, 24(2):206-211.

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