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本文对预应力混凝土受拉构件的设计作一系统的叙述。设计指标包括计算最大容许压力、极限强度,抗裂安全度、抗松弛安全度、最小钢筋含量、最大时效和永久变形。每项设计指标都是以二个未知函数表示,即预应力钢筋的面积和混凝土的总截面积。各项指标所示的关系曲线其可行范围大多数是限定在线性区域,用近似法设计是满意的。
In this paper, a systematic description of the design of prestressed concrete tension members is given. Design criteria include calculating the maximum allowable pressure, ultimate strength, crack safety, anti-sagging safety, minimum steel content, maximum aging and permanent deformation. Each design index is expressed by two unknown functions, namely the area of prestressed steel and the total cross-sectional area of concrete. The relationship curve shown in the indicators of the most feasible range is limited to the linear region, the approximation method is satisfactory.