Construction Monitoring Research And Practice Of Low Tower Cable-stayed Bridge

As a kind of bridge between the conventional cable-stayed bridge and the continuous beam,the low tower cable-stayed bridge has a lower tower height and a lower beam angle than the conventional cable-stayed bridge.Although the appearance of similar conventional cable-stayed bridge,but from the force analysis point of view,low tower cable-stayed bridge is actually closer to the continuous beam.This bridge type is widely used in highway bridge and railway bridge with its superior structural performance and good economic indicators.At the same time,the monitoring technology of supporting low tower cable-stayed bridge is also Become a popular research object.The construction of the low tower cable-stayed bridge in Anjiang town,Beijing-Shenyang passenger dedicated line is the background of this paper.The bridge construction monitoring and related issues as the main research object,including the followings:(1)The establishment method and precautions of the Midas/Civil finite element model of the low tower cable-stayed bridge are introduced.(2)The main contents and methods of construction monitoring are expounded.The application of dichotomy of this adaptive control method in the construction monitoring of low tower cable-stayed bridge is introduced,and the measured data in the construction monitoring process and the finite element model theoretical data are compared.(3)Through the finite element model of midas/civil,the sensitivity of the main parameters such as the weight of the main girder,the load of the steel beam,the tension of the steel beam,the tension of the secondary tension,the stiffness of the main beam and the cable stiffness are analyzed.The influence of the parameters on the construction of the low tower cable-stayed bridge is discussed in order to check the influence of the parameters on the construction of the low tower cable-stayed bridge.