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端钩型钢纤维有何特点
钢纤维的类型有很多，端钩型钢纤维是其中的一种，端钩型钢纤维的技术特点：
There are many types of steel fibers, one of which is end-hook steel fibers. The technical characteristics of end-hook steel fibers are as follows:
1、为变截面纤维，两端头均有增大截面的凸痕;
1. For variable cross-section fibers, both ends have bumps with enlarged cross-section.
2、钢纤维在砼构件中滑移，两端头凸痕形状不会变形，具有很强的锚固作用;
2. Steel fibers slip in concrete members, and the shape of bumps at both ends will not be deformed, which has a strong anchoring effect.
3、增强和增韧效果显著。特别是韧性，荷载-扰度曲线下降缓慢，砼特性更接近于理想弹塑性体;
3. The effect of strengthening and toughening is remarkable. Especially for toughness, the load-disturbance curve decreases slowly, and the concrete properties are closer to the ideal elastic-plastic body.
4、钢纤维混凝土结构要保证其破坏即断裂时是韧性破坏而不是脆性破坏，就要保证锚固混凝土裂缝两端中的钢纤维在破坏时是被拔出来而不是被拉断的，也就是钢纤维本身的抗拉强度一定应大于其拔出应力。
4. To ensure that the failure of steel fiber reinforced concrete structure is tough rather than brittle, it is necessary to ensure that the steel fibers in both ends of the anchored concrete cracks are pulled out rather than broken, that is to say, the tensile strength of the steel fibers themselves must be greater than the pull-out stress.
There are many types of steel fibers, one of which is end-hook steel fibers. The technical characteristics of end-hook steel fibers are as follows:
1、为变截面纤维，两端头均有增大截面的凸痕;
1. For variable cross-section fibers, both ends have bumps with enlarged cross-section.
2、钢纤维在砼构件中滑移，两端头凸痕形状不会变形，具有很强的锚固作用;
2. Steel fibers slip in concrete members, and the shape of bumps at both ends will not be deformed, which has a strong anchoring effect.
3、增强和增韧效果显著。特别是韧性，荷载-扰度曲线下降缓慢，砼特性更接近于理想弹塑性体;
3. The effect of strengthening and toughening is remarkable. Especially for toughness, the load-disturbance curve decreases slowly, and the concrete properties are closer to the ideal elastic-plastic body.
4、钢纤维混凝土结构要保证其破坏即断裂时是韧性破坏而不是脆性破坏，就要保证锚固混凝土裂缝两端中的钢纤维在破坏时是被拔出来而不是被拉断的，也就是钢纤维本身的抗拉强度一定应大于其拔出应力。
4. To ensure that the failure of steel fiber reinforced concrete structure is tough rather than brittle, it is necessary to ensure that the steel fibers in both ends of the anchored concrete cracks are pulled out rather than broken, that is to say, the tensile strength of the steel fibers themselves must be greater than the pull-out stress.
