Unified calculation method and its application in determining the uniaxial mechanical properties of concrete

被引：136

作者：

Ding F. ^{[1
]}

Ying X. ^{[1
]}

Zhou L. ^{[1
]}

Yu Z. ^{[1
]}

机构：

[1] College of Civil Engineering, Central South University

来源：

Frontiers of Architecture and Civil Engineering in China | 2011年 / 5卷 / 3期

基金：

中国国家自然科学基金;

关键词：

application; concrete; mechanical properties; stress-strain relationship; uniaxial stress;

D O I：

10.1007/s11709-011-0118-6

中图分类号：

学科分类号：

摘要：

This paper presents a unified calculation method and its application in determining the uniaxial mechanical properties of concrete with concrete strengths ranging from 10 to 140 MPa. By analyzing a large collection of test results of the uniaxial mechanical properties of normal-strength, high-strength and super high-strength concrete in China and performing a regression analysis, unified calculation formulas for the mechanical indexes of concrete are proposed that can be applied to various grades of concrete for determining the size coefficient, uniaxial compressive strength, uniaxial tensile strength, elastic modulus, and strain at peak uniaxial compression and tension. Optimized mathematical equations for the nonlinear stress-strain relationship of concrete, including the ascending and descending branches under uniaxial stress, are also established. The elastic modulus is almost constant throughout the elastic stage for the ascending branches of the stress-strain relationship for concrete. The proposed stress-strain relationship of concrete was applied to the nonlinear finite element analysis of both a steel-concrete composite beam and a concrete-filled steel tubular stub column. The analytical results are in good agreement with the experiment results, indicating that the proposed stress-strain relationship of concrete is applicable. The achievements presented in this paper can be used as references for the design and nonlinear finite element analysis of concrete structures. © 2011 Higher Education Press and Springer-Verlag Berlin Heidelberg.

引用

页码：381 / 393

页数：12

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