论文部分内容阅读
研究了无粘结预应力混凝土梁的裂缝控制设计方法,利用将无粘结预应力筋的拉力作为构件截面外力的思路,把无粘结预应力混凝土梁的裂缝宽度计算,转化为普通钢筋混凝土梁的裂缝宽度计算,提出了与GB50010-2002《混凝土结构设计规范》相衔接的无粘结预应力混凝土梁的裂缝宽度计算公式及裂缝宽度限值.与已收集到的84组无粘结预应力混凝土梁模型试验的裂缝宽度实测值相比较,验证了本文建议的无粘结预应力混凝土梁的裂缝宽度计算公式的合理性,可供我国今后修订相关规范时参考.
The design method of crack control for unbonded prestressed concrete beams is studied. By using the tension of unbonded prestressed tendons as the external force of member cross-section, the crack width of unbonded prestressed concrete beams is calculated and converted into ordinary reinforced concrete Crack width calculation of the beam, and proposed with the GB50010-2002 “Design Code for Concrete Structures,” the unbonded prestressed concrete beam crack width calculation formula and the crack width limits. Has been collected 84 sets of unbonded pre Compared with the measured values of the crack width in the stress concrete beam model test, the rationality of the formula for calculating the crack width of the unbonded prestressed concrete beam proposed in this paper is verified, which can be used as a reference for our country to amend the relevant specifications in the future.