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跨越裂缝和靠近裂缝尖端的钢纤维会应力传递分散
混凝土在其浇筑、养护及硬化过程中，因失水和工艺因素引起收缩，内部会出现不同尺度的微细裂缝和毛细孔等缺陷；在受到外力作用时，这些缺陷和裂缝开始扩展，随着裂缝延伸，逐渐降低混凝土的承受能力，最终导致突发的脆性破坏。
In the course of concrete pouring, curing and hardening, shrinkage is caused by water loss and technological factors, and micro-cracks and capillary holes of different scales will appear in the interior of concrete. When subjected to external forces, these defects and cracks begin to expand, and with the extension of cracks, the bearing capacity of concrete will be gradually reduced, eventually leading to sudden outbursts. Brittle failure.
混凝土基体中掺入均匀分布的钢纤维后，由于钢纤维的延性远远大于混凝土基体的延性，当混凝土基体受到外力作用时，跨越裂缝和靠近裂缝尖端的钢纤维会应力传递分散，使应力集中程度得到缓和。这种效应贯穿于混凝土受力的全过程，从而推迟裂缝的出现，裂缝宽度细化，改变了因单缝开裂而引起的脆性破坏形态，提高了混凝土材料的强度、韧性、阻裂能力和耐久性能。
When uniformly distributed steel fibers are added into concrete matrix, the ductility of steel fibers is much greater than that of concrete matrix. When the concrete matrix is subjected to external forces, the steel fibers spanning cracks and near the crack tip will transmit stress dispersedly, which will ease the stress concentration. This effect runs through the whole process of concrete stress, thus delaying the appearance of cracks, thinning the crack width, changing the brittle failure mode caused by single crack cracking, and improving the strength, toughness, crack resistance and durability of concrete materials.
In the course of concrete pouring, curing and hardening, shrinkage is caused by water loss and technological factors, and micro-cracks and capillary holes of different scales will appear in the interior of concrete. When subjected to external forces, these defects and cracks begin to expand, and with the extension of cracks, the bearing capacity of concrete will be gradually reduced, eventually leading to sudden outbursts. Brittle failure.
混凝土基体中掺入均匀分布的钢纤维后，由于钢纤维的延性远远大于混凝土基体的延性，当混凝土基体受到外力作用时，跨越裂缝和靠近裂缝尖端的钢纤维会应力传递分散，使应力集中程度得到缓和。这种效应贯穿于混凝土受力的全过程，从而推迟裂缝的出现，裂缝宽度细化，改变了因单缝开裂而引起的脆性破坏形态，提高了混凝土材料的强度、韧性、阻裂能力和耐久性能。
When uniformly distributed steel fibers are added into concrete matrix, the ductility of steel fibers is much greater than that of concrete matrix. When the concrete matrix is subjected to external forces, the steel fibers spanning cracks and near the crack tip will transmit stress dispersedly, which will ease the stress concentration. This effect runs through the whole process of concrete stress, thus delaying the appearance of cracks, thinning the crack width, changing the brittle failure mode caused by single crack cracking, and improving the strength, toughness, crack resistance and durability of concrete materials.
