后张法预应力空心板梁张拉控制程序研究

Tensile Control Procedures of Post-Tensioned Prestressing Hollow Slab Beam

后张法预应力钢绞线张拉过程中,按传统方法施工时,测量伸长值与理论伸长值的差值往往超过规范允许的范围。结合工程实践并经过反复探索,对张拉的初始控制应力进行调整后,实测伸长值与理论伸长值的差值将能满足规范允许的范围。

During the tensioning of post-tensioned prestressing steel stranded wire,the differentials between measured elongation value and theory elongation value often surpass the standard permissible scope according to traditional method.Based on the engineering practice and repeated exploration,after the initial control stress of tensile is adjusted,the differentials between actual elongation value and theory elongation value will be able to satisfy the standard permissible scope.