CFRP加固高强混凝土的本构模型研究

Study on Constitutive Model of High-strength Concrete Confined by CFRP

利用主动侧限混凝土柱的轴向压缩本构模型,结合多轴应力下的混凝土破坏准则,建立了CFRP加固高强混凝土的轴向压缩本构关系,并与CFRP加固高强混凝土柱的轴心受压试验结果进行对比分析。结果表明:采用理论模型计算的碳纤维布约束高强混凝土的应力—应变曲线与试验曲线吻合较好。

By use of the constitutive model of axial compression of active confinement concrete columns and the failure criterion of concrete under multi-axial stress,the theoretical expression of stress-strain relationships of axial compression for the passive confinement concrete columns is derived.The theoretical curves are compared with the experimental curves,which are obtained by the tests of CFRP confining high-strength concrete columns.The results indicate that the theoretical curves are in good agreement with the experimental curves.