东南大学学报（自然科学版）2017，Vol.47Issue(2)：369-376,8.DOI:10.3969/j.issn.1001-0505.2017.02.028
超高性能混凝土单轴受压本构关系
Constitutive relationship of ultrahigh performance concrete under uni-axial compression
摘要
Abstract
To investigate the constitutive relationship of ultrahigh performance concrete (UHPC) under uni-axial compression,the similarity and the difference of different constitutive equations of UHPC proposed by available literatures are analyzed and compared.The unified constitutive equation of UHPC under uni-axial compression is suggested.The empirical formulas for calculating the peak compressive strain and the elasticity modulus are obtained by fitting the experimental data of UHPC under uni-axial compression.Finally,the calculation formula for the parameters of the stress-strain curve in the ascending phase of UHPC under uni-axial compression is proposed.The research results show that the constitutive equation provided by the Code for Design of Concrete Structures (GB 50010-2010) can be used to calculate the stress-strain relationship of UHPC.When the axial compressive strength is 80 to 150 MPa,the peak compressive strains of the cylinder specimens are 5.0 x 10-4 to 7.5 x 10-4 larger than those of the prism specimens with the same axial compressive strengths.The higher the axial compressive strength is,the larger the difference of the peak compressive strains between the cylinder and the prism specimens.The proposed empirical formulas for the peak compressive strain,the elasticity modulus and the parameter of stress-strain curve in the ascending phase of UHPC have high accuracy and reliability,and can be used for engineering design of UHPC structures.关键词
超高性能混凝土/单轴受压/本构方程/峰值应变/弹性模量/应力-应变曲线上升段参数Key words
ultrahigh performance concrete (UHPC)/uni-axial compression/constitutive equation/peak strain/elasticity modulus/parameter of stress-strain curve in ascending phase分类
建筑与水利引用本文复制引用
郭晓宇,亢景付,朱劲松..超高性能混凝土单轴受压本构关系[J].东南大学学报（自然科学版）,2017,47(2):369-376,8.基金项目
国家自然科学基金资助项目(51578370)、天津市科技支撑计划重点资助项目(16YFZCSF00460). （51578370）
