Parametric Analysis of Factors Affecting Fundamental Frequency of Suspension Bridges and Practical Calculation
Bridge designers often use simplified(practical)formulas to estimate the fundamental frequency of bridges,in order to estimate their dynamic performance in the early stages of large-span bridge design.However,with the development of bridge construction,the accuracy of some formulas can no longer meet the requirements;there are also significant differences in the usability of various formulas in practical use.By analyzing the error sources of each fundamental frequency estimation formula,key variables were selected and the influence of main control factors was studied using parametric finite element analysis.By selecting the improvement strategy,the usability of estimation formula was improved and the variables were simplified by analyzing the relationship between each parameter.Verified by the measured and calculated fundamental frequency results,the improved practical formula not only improved the estimation accuracy and controlled the global error extremum of the results of estimation formula,but also improved the value of engineering application.
long-span bridgesuspension bridgedynamic characteristicsfundamental frequency estimation
万方数据
维普
