基于骨料尺度的混凝土开裂形态影响分析

摘要

The parameter variation of aggregates has great influence on the mechanical properties of concrete.It established two-dimensional models of concrete random aggregate model,by controlling the aggregate size and area ratio to research the influence of concrete cracking form and the peak stress by aggregate content change under different dimension.It turns out,most of the damage units in the model first appear near small scale aggregate.And peak stress of concrete is roughly increase along with the increase of aggregate area ratio under the same aggregate size.%骨料的参数变化对混凝土力学性能的影响较大.建立二维混凝土随机骨料模型,通过控制骨料尺度与面积占比两个参数,研究不同尺度下骨料的含量变化对混凝土开裂形态及峰值应力的影响.结果表明,模型中大部分的破坏单元首先出现在小尺度骨料附近,混凝土峰值应力大致随同一尺度骨料面积占比的增加而增加.