本文以试验为基础,研究在单调比例双轴压应力作用下混凝土的应力-应变关系,分析了峰值应变随应力比或峰值应力的变化规律,提出了相应的计算公式;将试验结果与几种本构模型进行了比较,并从工程应用角度提出了简单实用的应力-应变计算公式,其计算结果具有令人满意的精度。 Based on experiments, this paper studies the stress-strain relationship of concrete under monotonic proportional biaxial compressive stress, analyzes the variation law of peak strain with stress ratio or peak stress, and proposes the corresponding calculation formula; The constitutive models are compared, and a simple and practical stress-strain calculation formula is proposed from the perspective of engineering application. The calculation results have satisfactory accuracy.