CAJ | 학술논문

用细观分析来模拟混凝土立方体劈裂试验的力学特性，常将混凝土看成由粗骨料、砂浆质和界面过渡区组成的三相复合材料。为了研究骨料形状对混凝土劈拉试验的影响，三组18个数值试件被用来进行劈裂计算。对于砂浆基体和界面过渡区使用损伤塑性模型，骨料则假设为线弹性体。数值模拟结果体现了混凝土宏观力学响应的非线性特性，反映出混凝土骨料形状对劈拉结果的微小影响，证明了劈拉强度与试验数据基本吻合。此外，还讨论了不同加载垫条宽度对劈拉强度的影响。
용세관분석래모의혼응토립방체벽렬시험적역학특성，상장혼응토간성유조골료、사장질화계면과도구조성적삼상복합재료。위료연구골료형상대혼응토벽랍시험적영향，삼조18개수치시건피용래진행벽렬계산。대우사장기체화계면과도구사용손상소성모형，골료칙가설위선탄성체。수치모의결과체현료혼응토굉관역학향응적비선성특성，반영출혼응토골료형상대벽랍결과적미소영향，증명료벽랍강도여시험수거기본문합。차외，환토론료불동가재점조관도대벽랍강도적영향。
A meso-scale analysis is performed to simulate the mechanical properties of concrete in the splitting test on cube specimens . The influence of aggregate shape on the splitting test in concrete is considered .For this purpose ,eighteen simples in three groups with different aggregate particle shapes are generated by a meso-scale approach ,which treats the concrete as a three-phase composite materials consisting of coarse aggregate grains surrounded by an interfacial transition zone embedded in the mortar matrix .A damage plasticity model is applied to the mortar matrix and interfacial transition zone whereas the aggregates are assumed to behave in the form of linear elastic .The macroscopic mechanical response of concrete in splitting tests represents the nonlinearity in the results ob‐tained from the numerical simulation .These splitting strengths agree well with available experimental data and show a slight depend‐ence on the aggregate shape .Additionally ,the effect of different loading strip widths on the splitting strength of concrete is i dis‐cussed .