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.

摘要： 针对目前砼斜拉桥应力监测作为施工控制难点所在 ,提出了一种适用于大跨度砼斜拉桥的应力监测方法 .该方法利用主梁中性轴应力只与斜拉索水平分力有关这一特点 ,使用实测索力求出中性轴应力 ,再用中性轴应力识别徐变系数 ,继而求出其余应力 .采用文中提出的方法应用于目前在建的一座大跨度砼斜拉桥 ,效果良好 ,证明此法的正确性和实用性

关键词: 斜拉桥, 应力监测, 施工控制, 徐变