Research on Frequency Calculation of Short Suspension Rod with Fixed Support at Both Ends
In order to analyze the influence of flexural stiffness on the frequency of short suspension rod and solve the problem of low calculation accuracy of natural vibration frequency of short suspension rod tension,based on the existing formula of natural vibration frequency considering the non-linear vibration of the cable-stayed cables with fixed support at both ends,the experimental analysis with a 64 m through tied arch bridge in a practical project as the object was established.By using the measured data of actual tension and finite element software,a model considering the flexural stiffness of suspen-sion rod was established to analyze the influence of flexural stiffness on the cable force of suspension rods of different lengths.The method of the correction formula of the theoretical natural vibration fre-quency was introduced and the correction formula of the theoretical frequency was fitted out.The appli-cation of this method to the construction monitoring of 83 m tied arch bridge shows that compared with the traditional frequency calculation formula,the tension error of the suspension rod is smaller and the error of the short suspension rod is within plus or minus 5％.
short suspension rod frequency calculationfrequency methodboundary conditionsflexural stiffness
万方数据
维普
