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以混凝土梁为例,研究混凝土结构开裂后的位移变化规律。用ANSYS软件建立混凝土简支梁与连续梁模型,在其上施加均布荷载,通过减少单元来模拟梁内裂缝情况。分别模拟不同宽度、不同深度、不同位置的裂缝,并观察混凝土梁最大位移的变化及梁整体变形特征的改变。研究结果表明:裂缝宽度对混凝土梁的最大位移影响不大;裂缝深度对混凝土梁的最大位移影响显著,且裂缝越深对梁的最大位移影响越大;同时,裂缝位置对梁体最大位移变化影响较大,且梁内出现裂缝会使梁内最大位移的位置发生变化,裂缝越深这种变化越显著。
Taking concrete beam as an example, the displacement of concrete structure after cracking is studied. ANSYS software was used to build the model of concrete simply supported beam and continuous beam, and a uniform load was applied on it to simulate the crack in the beam by reducing the unit. The cracks in different widths, depths and locations were simulated respectively. The changes of the maximum displacement of the concrete beam and the deformation characteristics of the whole beam were also observed. The results show that: the width of crack has little effect on the maximum displacement of concrete beam; the depth of crack has a significant effect on the maximum displacement of concrete beam, and the deeper the crack is, the greater the influence on the maximum displacement of beam is. At the same time, A greater impact, and the emergence of cracks within the beam beam will be the location of the maximum displacement changes, the deeper the crack this change more significant.