During construction cable-stayed bridges become more flexible with lower vibration frequency. The vertical buffeting response thus produced will be larger at the end of the beam because of turbulent winds. Moreover

larger longitudinal moment will be caused at the tail of tower by the shaking of the top of tower. In this paper

a three-tower cable-stayed bridge is considered. Based on the finite element buffeting theory of long-span bridges

the effect of five kinds of different measures of wind-cable and temporary support stake are analyzed and compared. Some useful results are obtained as follows: 1.When the cantilevered deck length is the largest

larger longitudinal moment at the tail of tower is mainly caused by first step of longitudinal moment. This value will potentially exceed its ultimate carrying capacity. It is necessary to apply some restraining measures to ensure wind-resisting safety of the long-span bridge at construction stage. 2.There are some buffeting-restraining effects by applying wind-cables to structure. Among the schemes discussed in this paper

setting wind-cables according to the scheme of beam end- boat will be more convenient during construction. Moreover

it is relatively cost-effective and thus recommended for application. 3.Setting temporary support stake can markedly reduce the buffeting response of the structure. In order to ensure safety at the construction stage

the construction must avoid typhonic days as possible as it can do

otherwise setting wind-cables or temporary support stake should be taken as buffeting-restraining measures.