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部分预应力混凝土梁的设计可按下面流程图1进行。一、部分预应力混凝土梁的概念部分预应力混凝土梁是以预应力和钢筋加强使之满足所需裂缝条件的混凝土结构的总称。以往,钢筋混凝土梁是以钢筋加强的混凝土梁,容许产生裂缝,设计上也考虑裂缝。预应力混凝土梁以预应力钢材加强混凝土,使之不产生裂缝,设计上全部混凝土截面都作为有效的。这可理解为,钢筋混凝土梁和预应力混凝土梁设计方法的不同在于“裂缝的控制”。
The design of partially prestressed concrete beams can be performed as shown in flow chart 1 below. First, the concept of partial prestressed concrete beams Part of the prestressed concrete beams is prestressed and reinforced to make it meet the required crack conditions, the general term for concrete structures. In the past, reinforced concrete beams were concrete beams reinforced with steel bars, allowing cracks to be generated and designing cracks. Prestressed concrete beams reinforced concrete with prestressed steel so that it does not produce cracks, the design of all concrete sections are valid. This can be understood as the difference between the design method of reinforced concrete beams and prestressed concrete beams in “crack control.”