【摘 要】
：
采用体外预应力竖向张拉双折线布筋方法,对2根矩形对比梁,三组不同预应力筋配筋率、不同工况的9根矩形钢筋混凝土简支梁进行了加固试验研究。在考虑二次效应、体外预应力筋有
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采用体外预应力竖向张拉双折线布筋方法,对2根矩形对比梁,三组不同预应力筋配筋率、不同工况的9根矩形钢筋混凝土简支梁进行了加固试验研究。在考虑二次效应、体外预应力筋有效应力和加固工况的影响下,对加固梁的短期刚度进行了验证分析计算,得到了加固梁短期刚度计算公式的适用范围,并计算得到了试验梁的短期挠度值。
In this paper, we use the method of externally prestressed vertical birefringence to reinforce 9 rectangular reinforced concrete beams with two rectangular beams, three reinforced beams with different prestressing tendons and different working conditions. Considering the secondary effect, the effective stress of external prestressing tendons and the reinforcement working conditions, the short-term stiffness of the reinforced beam is verified and analyzed, and the applicable range of the formula for calculating the short-term stiffness of the reinforced beam is obtained. The experimental beam Short-term deflection value.
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