摘要
桥梁预应力施工时,采用张拉应力和伸长值双控,实际伸长值与理论伸长值误差不得超过6%,所以伸长值的计算就相当重要,本文结合实际施工过程,通过对后张法预制预应力板预应力钢丝束张拉伸长值的计算,总结出一套较适用于现场施工的伸长值的计算方法。
It controls both stretching stress and extension value when we construct prestress concrete beam-slab bridge.This paper sums up a set of calculating method about extension value at site after calculation of extension value about post-tensioning prestress steel wire strand connecting construction.
出处
《辽宁省交通高等专科学校学报》
2009年第6期8-11,共4页
Journal of Liaoning Provincial College of Communications
关键词
后张法
预应力
伸长值
计算
post-tensioning
prestress
extension value
calculation
