【摘要】 为了得到冻融循环条件下砌体受压损伤本构关系模型,首次将应变等价原理应用于砌体结构中,将冻融循环后的轴心受压砌体的总损伤等效为冻融阶段和轴心受压阶段两种状态下损伤的非线性耦合,然后基于损伤力学基本原理和砌体细观结构的非均匀性,分析两种损伤状态的劣化过程以及损伤演化途径,推导冻融循环后的轴心受压砌体的总损伤演化方程,最终建立冻融循环条件下砌体受压损伤本构关系模型,并通过已有试验数据验证了模型的合理性。更多还原

【Abstract】 In order to get the constitutive relationship model under freeze-thaw cycles for compression masonry,the promoted strain equivalence principle is applied to the masonry structures for the first time and the total damage of the masonry which withstand axial load after freeze-thaw cycles were equaled to the nonlinear coupling of the freeze-thaw damage and axial compression damage. Then based on the basic principles of damage mechanics and the nonhomogeneity of masonry microstructure,deterioration process and damage evolution route for the two damage states were analyzed,the total damage evolution equation of masonry withstanding axial compression after freeze-thaw cycles was derived,finally the constitutive relationship model under freeze-thaw cycles for compression masonry was established and was verified to be rational by existing test data.更多还原