一、冷拔丝预应力混凝土构件的静力破坏特征及其强度和变形的控制构件的破坏分“塑性破坏”和“脆性破坏”两类,介于其间的有人称为“混合破坏”。决定构件破坏形态的主要因素是:受拉钢筋(钢丝)的变形特性、配筋率以及受力性质等。设计计算中,一般都力求控制构件呈现“塑性破坏”。构件呈现塑性破坏的主要标志是:构件破坏时,受拉钢筋(钢丝)和受压区混凝土都相应地发挥了它们应有的强度,同时,构件破坏前具有较大的变形预兆。如构件无上述破坏征状而突然断裂,便属于脆性破坏,在设计计算中,对于这类构件就应给予较大的强度安全贮备。以下在分析冷拔丝材性特点的基础上讨 First, the characteristics of static failure of pre-stressed concrete members with cold-drawing wire and the destruction of control members of strength and deformation are divided into two categories: “plastic failure” and “brittle failure”. Some people in between are called “mixed”. damage“. The main factors that determine the failure mode of components are: deformation characteristics, reinforcement ratio, and stress properties of tensioned steel bars (steel wires). In design calculations, control components are generally sought to exhibit ”plastic failure." The main signs of plastic failure of components are: When the components are destroyed, the tensile reinforcement (steel wire) and the concrete in the compression zone all exert their corresponding strengths. At the same time, the components have great signs of deformation before their destruction. If the component suddenly breaks without the above-mentioned damage symptoms, it is a brittle failure. In the design calculation, a greater strength and safety reserve should be given to such components. The following is based on the analysis of the characteristics of cold drawing