冷轧带肋钢筋焊接网混凝土板抗弯性能试验

为研究冷轧带肋钢筋焊接网混凝土板的抗弯性能，通过拉伸试验，获得了CRB600H与CRB550冷轧带肋钢筋的力学性能指标；进行了32块冷轧带肋钢筋焊接网混凝土板的受弯性能试验，测定了试验板的开裂弯矩、裂缝分布情况、变形发展规律和正截面承载力.研究结果表明：焊点未对CRB600H与CRB550冷轧带肋钢筋的力学性能产生影响；横向钢筋对试验板的开裂弯矩、裂缝间距和裂缝宽度无明显影响.建立了这类板的短期刚度计算公式，与普通混凝土板相比，这类板的抗弯刚度高约10%.根据配置CRB600H和CRB550钢筋网试验板的破坏模式，提出了这两种板正截面承载力的计算方法.
The mechanical property indexes of 600 MPa and 550 MPa cold-rolled ribbed steel wires were determined through tensile test, and the cracking moment, crack distribution, deflection under different loads and normal section bearing capacity were studied through 32 slabs reinforced with cold-rolled ribbed welded steel fabric to investigate the flexural behavior of slabs reinforced with cold-rolled ribbed welded steel fabric. The results showed that solder joints had no influence on the mechanical properties of 600 MPa and 550 MPa cold-rolled ribbed steel wires. Transverse reinforcements in fabric had little effect on the cracking moment, crack spacing and crack width of this type of slabs. The short-term flexural rigidity equations were established, the flexural rigidity of this type of slabs was 10% greater than ordinary concrete slabs. Based on the failure mode of slabs reinforced with 600 MPa and 550 MPa cold-rolled ribbed steel wires, the calculation method of normal section bearing capacity was proposed.