关键词: 斜拉桥, 应力监测, 施工控制, 徐变

Abstract: As stress measurement of interior concrete is hard in the contruction control of the cable stayed bridge,a new method fitted for stress measurement in long span PC concrete cable stayed bridge is proposed in this paper. This method is based on the normal stress in neutro axis of girder is only decided on the horizontal part of the cable force.First calculate the normal stress in neutro axis of girder by the measured cable force,then identify the creep coefficients,and then make out the other stresses.The results of a building long span PC cable stayed birdge used by the this mehtod show the accuracy and efficientcy of the proposed method.