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钢纤维增强混凝土说明
钢纤维混凝土是在普通混凝土中掺入乱向分布的短钢纤维所形成的一种新型的多相复合材料。这些乱向分布的钢纤维能够有效地阻碍混凝土内部微裂缝的扩展及宏观裂缝的形成,显著地改善了混凝土的抗拉、抗弯、抗冲击及抗疲劳性能,具有较好的延性。
Steel fiber reinforced concrete (SFRC) is a new kind of multiphase composite material formed by mixing short steel fibers with random distribution in ordinary concrete. These randomly distributed steel fibers can effectively hinder the expansion of micro-cracks and the formation of macro-cracks in concrete, significantly improve the tensile, flexural, impact and fatigue properties of concrete, and have good ductility.
一,钢纤维增强混凝土说明：钢纤维混凝土混合在普通混凝土中与短钢纤维混合形成的新型多相复合材料。这些混沌钢纤维可以有效阻碍混凝土的微裂纹扩展和宏观裂缝的形成,从而提高混凝土的拉伸,弯曲,抗冲击和抗疲劳性能,具有良好的延展性。
First, steel fiber reinforced concrete: steel fiber reinforced concrete mixed in ordinary concrete with short steel fibers to form a new type of multi-phase composite material. These chaotic steel fibers can effectively hinder the growth of microcracks and the formation of macro-cracks in concrete, thereby improving the tensile, bending, impact and fatigue resistance of concrete, with good ductility.
二,钢纤维混凝土的力学性能：普通钢纤维纤维体积比在1％-2％之间,与普通混凝土相比,拉伸强度提高了40％-80％,抗弯强度提高了60％-120％剪切强度提高50％100％,抗压强度增加幅度小,通常在0-25％之间,但压缩韧性大大提高。
Second, the mechanical properties of steel fiber reinforced concrete: the volume ratio of ordinary steel fiber to concrete is between 1% and 2%. Compared with ordinary concrete, the tensile strength increases by 40%-80%, the flexural strength increases by 60%-120% and the shear strength increases by 50%-100%. The compressive strength increases slightly, usually between 0-25%, but the compressive toughness increases greatly.
三,钢纤维混凝土影响因素：基于纤维间距理论,复合理论和微裂纹理论等多种纤维生长机理理论,大量实验数据分析,可以看出纤维的增强效应主要取决于基体强度（fm） ,纤维长径比（钢纤维长度l与直径d的比值,I / d）,纤维的体积分数（钢纤维混凝土中钢纤维的体积百分比）,纤维的粘结强度（τ）和基体,以及分布和取向（η）中的纤维（Η）。当钢纤维混凝土断裂时,大多数纤维被拉出而不是被拉出,因此提高纤维和基材之间的粘结强度是提高纤维增强效果的主要控制因素之一。
3. Influencing factors of steel fiber reinforced concrete: Based on fiber spacing theory, composite theory and micro-crack theory, a large number of experimental data analysis shows that the reinforcement effect of fiber mainly depends on matrix strength (fm), fiber length-diameter ratio (ratio www.gzdebon.com.cnwww.dianLiwuzi.com.cnwww.btwujin.cnwww.bjsrxhsart.cnwww.huafuly.cnof www.huizhuanyao5.com.cnsteel fiber length L to diameter d, I/d), fiber volume fraction (volume of steel fiber in steel fiber reinforced concrete). Percentage, bond strength (_) and matrix of fibers, and fibers (_) in distribution and orientation (_). When steel fiber reinforced concrete breaks, most fibers are pulled out rather than pulled out, so improving the bond strength between fibers and matrix is one of the main control factors to improve the effect of fiber reinforcement.
Steel fiber reinforced concrete (SFRC) is a new kind of multiphase composite material formed by mixing short steel fibers with random distribution in ordinary concrete. These randomly distributed steel fibers can effectively hinder the expansion of micro-cracks and the formation of macro-cracks in concrete, significantly improve the tensile, flexural, impact and fatigue properties of concrete, and have good ductility.
一,钢纤维增强混凝土说明：钢纤维混凝土混合在普通混凝土中与短钢纤维混合形成的新型多相复合材料。这些混沌钢纤维可以有效阻碍混凝土的微裂纹扩展和宏观裂缝的形成,从而提高混凝土的拉伸,弯曲,抗冲击和抗疲劳性能,具有良好的延展性。
First, steel fiber reinforced concrete: steel fiber reinforced concrete mixed in ordinary concrete with short steel fibers to form a new type of multi-phase composite material. These chaotic steel fibers can effectively hinder the growth of microcracks and the formation of macro-cracks in concrete, thereby improving the tensile, bending, impact and fatigue resistance of concrete, with good ductility.
二,钢纤维混凝土的力学性能：普通钢纤维纤维体积比在1％-2％之间,与普通混凝土相比,拉伸强度提高了40％-80％,抗弯强度提高了60％-120％剪切强度提高50％100％,抗压强度增加幅度小,通常在0-25％之间,但压缩韧性大大提高。
Second, the mechanical properties of steel fiber reinforced concrete: the volume ratio of ordinary steel fiber to concrete is between 1% and 2%. Compared with ordinary concrete, the tensile strength increases by 40%-80%, the flexural strength increases by 60%-120% and the shear strength increases by 50%-100%. The compressive strength increases slightly, usually between 0-25%, but the compressive toughness increases greatly.
三,钢纤维混凝土影响因素：基于纤维间距理论,复合理论和微裂纹理论等多种纤维生长机理理论,大量实验数据分析,可以看出纤维的增强效应主要取决于基体强度（fm） ,纤维长径比（钢纤维长度l与直径d的比值,I / d）,纤维的体积分数（钢纤维混凝土中钢纤维的体积百分比）,纤维的粘结强度（τ）和基体,以及分布和取向（η）中的纤维（Η）。当钢纤维混凝土断裂时,大多数纤维被拉出而不是被拉出,因此提高纤维和基材之间的粘结强度是提高纤维增强效果的主要控制因素之一。
3. Influencing factors of steel fiber reinforced concrete: Based on fiber spacing theory, composite theory and micro-crack theory, a large number of experimental data analysis shows that the reinforcement effect of fiber mainly depends on matrix strength (fm), fiber length-diameter ratio (ratio www.gzdebon.com.cnwww.dianLiwuzi.com.cnwww.btwujin.cnwww.bjsrxhsart.cnwww.huafuly.cnof www.huizhuanyao5.com.cnsteel fiber length L to diameter d, I/d), fiber volume fraction (volume of steel fiber in steel fiber reinforced concrete). Percentage, bond strength (_) and matrix of fibers, and fibers (_) in distribution and orientation (_). When steel fiber reinforced concrete breaks, most fibers are pulled out rather than pulled out, so improving the bond strength between fibers and matrix is one of the main control factors to improve the effect of fiber reinforcement.
