某无背索部分斜拉桥斜拉索索力控制研究

无背索部分斜拉桥中的斜拉索不但是一种造型,更是改善桥梁线形和调节主梁受力分布的关键构件,在施工过程中其索力的施加顺序和大小都需按照一定的程序进行,这样才能保证成桥之前梁体内力分布合理、成桥后索力施加得充分且不超限.借助于有限元软件对某无背索斜拉桥的斜拉索受力状况进行研究分析,以得到斜拉索在实际工程中的受力状态和分布规律,并用环境随机振动频率法进行索力的测量,从而控制索力的精确张拉和调整.

Cable Force Control Study of a Partial Cable-stayed Bridge Without Backstays

The cable of partial cable-stayed bridge without backstays is not only a kind of shape, but also improves internal bridge force distribution reasonable before bridge finished, and the cable force exerted adequately and under limit. In this paper, by using finite element software, cable stress condition of a cable-stayed bridge without backstays was studied, in order to get the actual engineering of stress state and distribution regularity of the cable. And ambient random vibration frequency method was used tomeasure the cable force, for the precise tensioning and adjustment of cable force control.