Study on the Cable Force Calculation Model for Anchor Span in Different Construction Stages
In order to accurately calculate and control the anchor cable force,for anchor beam type anchor span structure,firstly,simplified calculation models for cable force in the tensioned state and the erection completed state are established re-spectively based on the analytical method,and the frequency-cable force relationship and its effectiveness are verified by the actual measured cable force of the bridge cable strands.Secondly,the influence of the subsequent cable strand erection on the force of the erected cable strands is analyzed,and a revised formula for measuring the cable force based on the string vibra-tion method is proposed,and the calculation lengths formulas of the cable strands considering the flexural stiffness and ignoring the flexural stiffness are deduced respectively.Finally,the influence of each construction stage on the cable force after the erection of the anchor spanning cable strands is analyzed,and it is clarified that the rotation of the loose cable saddle basically has no effect on the calculation of the cable force.
万方数据
维普
