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对钢筋进行冷加工,以提高其设计强度,是实际工程中节约钢材的有效途径。冷轧扭钢筋是北京市建筑科研所研制成功的一种新型钢筋,它以I级φ6.5普通圆钢筋为母材,通过一台冷轧扭机,将圆钢筋轧制成3×9毫米扁钢,并扭转成具有连续螺旋型麻花钢筋,兼有冷轧和冷扭两种冷加工工艺特点。它依靠机械的作用,使钢筋产生塑性变形而获得变形强化效益,不仅强度提高,而且与混凝土之间的握裹力亦显著增加,在构件工作过程中提高了钢筋与混凝土之间的共同工作效果,可充分发挥钢筋设计强度,节约钢材,同预
The cold processing of steel bars to increase their design strength is an effective way to save steel in practical projects. Cold-rolled and twisted steel bar is a new type of steel bar successfully developed by the Beijing Institute of Architectural Science and Technology. It uses a Class I φ6.5 ordinary round steel bar as its parent material and passes a cold-rolling and twisting machine to roll round steel bars into 3 × 9 mm. The flat steel is twisted into a continuous spiral twisted steel bar, which has the characteristics of cold rolling and cold twisting. It relies on the role of machinery to make the steel plastic deformation and get the deformation strengthening effect, not only the strength is improved, but also the binding force with the concrete is also significantly increased, and the joint work effect between the steel bar and the concrete is improved during the working of the component. , can give full play to the design strength of steel bars, save steel, with the pre