斜拉桥索塔大吨位环向预应力束伸长量试验分析

Experimental analysis of the extension of the ring prestressed steel bundle with great tonnage in the concrete tower of cable-stayed bridge

系统地分析了影响大吨位环向预应力束实测伸长量的主要因素 ,并引入附加伸长量的概念 ,对武汉军山长江公路大桥索塔锚固区足尺节段模型试验、工艺模型试验及实桥施工中实测伸长量比计算伸长量偏大的现象给出了合理的解释。

The major factors, affecting the extension of the ring prestressed steel bundle, are analyzed systematically in the paper.Introducing the additional extension, the phenomena that the measured value of the extension is greater than calculated value in full scale model experiment, technical model experiment and real bridge construction of the concrete tower of Wuhan Jinshan Highway Great Bridge, can be interpreted reasonably.