Abstract

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Title:: Analysis Model of Nonlinear Relationship of Main Cable Steel Wires in Cable Clip of Suspension Bridge

Author(s):: SHEN Rui-li; HE Kai; HUANG Zhen; School of Civil Engineering, Southwest Jiaotong University

Keywords:: suspension bridge; main cable steel wire; nonlinear relationship; finite element analysis; experimental research; analysis model; homogenization

Abstract:: In order to simplify the strong geometrical nonlinearity and contact nonlinear relationship between the large number of steel wires in the main cable of suspension bridge, and to research the transfer rules of firmly tight forces of high strength bolts in the steel wires, using the idea of homogenization, based on the macroscopic mechanical properties of the main cable and the cable clamp fastening system, the method of combining the experiment with the finite element analysis was used. The three-dimensional anisotropic solid model of the main cable was established under the cylindrical coordinate system with lengthways, radial direction and ring direction. The three-dimensional anisotropic uniform material was proposed to represent the average characteristics of the main cable system and was tested in two experiments to get the stress-strain relationship of three-dimensional anisotropic equivalent material. The results show that the frictional force of the contact surface of main cable clamp distributes in band along the length direction of the cable clamp. The firmly tight forces of high strength bolts show layered distribution in the cross section of the main cable after transmitting through the cable clamp, and are smaller in the centre and bigger at the surface. The comparison experiment proves that the equivalent material is suitable for the study of the main cable fastening.