[1] Guo Liping, , Yang Yanan, et al. A uniaxial tensile constitutive equationof high-ductility cementitious composites [J]. Journal of Southeast University (English Edition), 2019, 35 (4): 476-481. [doi:10.3969/j.issn.1003-7985.2019.04.010]

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A uniaxial tensile constitutive equationof high-ductility cementitious composites()

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

Volumn:

35

Issue:

2019 4

Page:

476-481

Research Field:

Other Disciplines

Publishing date:

2019-12-30

Info

Title:

A uniaxial tensile constitutive equationof high-ductility cementitious composites

Author(s):

Guo Liping¹;  2;  3;  Yang Yanan¹;  2;  3;  Chen Bo⁴

¹School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
²Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
³Collaborative Innovation Centre for Advanced Civil Engineering Materials, Southeast University, Nanjing 211189, China
⁴State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China

Keywords:

uniaxial tensile;  constitutive equation;  simplified model;  high-ductility cementitious composites

PACS:

TV431

DOI:

10.3969/j.issn.1003-7985.2019.04.010

Abstract:

In order to establish the constitutive relationship of high-ductility cementitious composites(HDCCs)under uniaxial tensile load and to guide the structural design of HDCCs, based on the analysis of the existing uniaxial tensile constitutive relationship and ideal elastoplastic linear strain-hardening model, a bilinear tensile constitutive equation of HDCCs was proposed. The points of nominal initial cracking and nominal maximum stress were adopted as control points of the line segment, and the constitutive relationship of HDCCs was established. Five series of uniaxial tensile stress-strain curves of HDCCs were combined to perform an experimental application of the constitutive equation, along with an analysis of the key parameters. The experimental results confirm the ability of the constitutive equation to overcome the problem of insufficient or excessive redundancy of existing models in terms of calculation bearing capacity. Specifically, the measured maximum stress value is larger than the nominal value, and the ratio between the two values ranges from 1.08 to 1.22. Additionally, the tensile strain at the softening point obtained by fitting a straight line with the valley points of the strain-hardening stage curve is greater than or equal to the tensile strain at the measured maximum stress point and the ratio of the fitted values to the measured values ranges from 1.00 to 1.19.

References:

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Memo

Memo:

Biography: Guo Liping(1979—), female, doctor, associate professor, guoliping691@163.com.
Foundation items: The National Key Research and Development Program of China(No.2018YFC0406701), the National Natural Science Foundation of China(No.51778133, 51739008).
Citation: Guo Liping, Yang Yanan, Chen Bo. A uniaxial tensile constitutive equation of high-ductility cementitious composites[J].Journal of Southeast University(English Edition), 2019, 35(4):476-481.DOI:10.3969/j.issn.1003-7985.2019.04.010.

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