高性能混凝土本构关系研究

本文主要介绍了高性能混凝土和普通混凝土在无减摩和减摩情况下的本构关系试验比较结果，着重对抗压极限强度、峰值压应变、应力 应变关系、弹性模量、泊松比、初裂应力等进行分析比较。研究表明:高性能混凝土与普通混凝土相比，压缩弹性阶段较长，弹性模量较高，两种混凝土峰值压应变、泊松比较接近，初裂应力都较大；减摩措施降低了这两种混凝土的抗压强度测值、普通混凝土的初裂应力和弹性模量测值，但减摩对高性能混凝土弹模影响不大，且提高了高性能混凝土的初裂应力。

A study on constitutive relation of high performance concrete

The constitutive relation of high performance concrete (HPC) is compared with normal concrete (NSC) by tests of friction and antifriction in this paper. Compressive strength, peak compressive strains, compressive stress strain curves, elastic modulus, Poisson's ratio and first crack stresses of two kinds of concrete are analyzed and compared emphatically. It is shown that the elastic stage of HPC is longer and its elastic modulus is higher than those of NSC, but the peak compressive strains and the Poisson's ratio of them are similar, and their first crack stresses are all rather large. Furthermore, if antifriction is applied, the compressive strength of two kinds of concrete, the first crack stress and the elastic modulus of NSC are all decreased, but the first crack stress of HPC is higher than that of NSC, and the difference of elastic modulus between them is rather small.