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后张法预应力梁预施应力是用千斤顶来控制预应力值的,为了校核预应力值,在张拉过程中需要测出预应力筋的实际伸长值。该实际伸长值与计算伸长值的误差要求在规定的范围之内。本文就伸长值的理论计算方法提出一个既能满足张拉精度要求,又能使计算简化的公式,供读者参考。
Post-tensioned prestressed beam pre-stress is used to control the prestressed jack value, in order to check the pre-stress value, the tension in the process of measuring the actual elongation of prestressed tendons. The actual elongation value and calculate the elongation value of the error requirements within the specified range. In this paper, a theoretical calculation method for the elongation value is proposed for readers to refer to a formula that can not only meet the requirements of tension accuracy but also simplify the calculation.