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根据梁式结构拉压应力场的特点,在受拉区1/3梁高的范围用内钢纤维混凝土替换普通混凝土得到一种局部钢纤维-钢筋混凝土复合梁,并根据复合梁抗弯试验结果给出了局部钢纤维-钢筋混凝土复合梁开裂荷载和极限荷载的计算方法。局部钢纤维-钢筋混凝复合土梁的抗弯性能试验表明:与普通钢筋混凝土对比梁相比,局部钢纤维-钢筋混凝土复合梁开裂荷载、屈服荷载和极限荷载分别提高47.6%、13.2%和11.5%;复合梁开裂晚,达到裂纹基本出奇阶段晚,且裂纹条数条,裂纹间距大,是一种抗裂结构。
According to the characteristics of tensile and compressive stress field of beam structure, a local steel fiber reinforced concrete composite beam is obtained by replacing ordinary concrete with internal steel fiber reinforced concrete in the range of 1/3 of the height of the beam in the tension zone. According to the bending test results of the composite beam, The Calculation Method of Cracking Load and Ultimate Load of Local Steel Fiber Reinforced Concrete Composite Beam. The flexural tests of the local steel fiber reinforced concrete composite beam show that the cracking load, yield load and ultimate load of the local steel fiber reinforced concrete composite beam increase by 47.6%, 13.2% and 11.5%; composite beam late cracking, reaching the basic surprising stage late crack, and the number of cracks, crack spacing, is a crack-resistant structure.