According to the research status of viscous shearing damper,the finite element program-ANSYS is adopted to analyze the strand stay cables,and the influence factors of vibration-reduce effect wh.

Introduce to parallal strand stayed cables with four layers protection, which applied in stayed cable bridges at abroad in recent years, and the adopted plan of the major bridge of Queshi Bridge.

This article discusses the advantage and shortcoming in characteristic and economics aspects of the parallel strand stayed cable and the parallel wire stayed cable when they are made as the main stress elements of the cable stayed bridge.