mirror extensometer

According to the prob lem that calculated elongation value less-than actual value analysis is made; a t the same time one method is proposed for theoretical elongation value calculat ion.

结合具体的工程实践,介绍了后张法预应力梁钢绞线的张拉过程,对现场“计算伸长值小于实际伸长值”这一问题作了分析,提出了预应力筋理论伸长值的计算方法。