Determination method of bridge influence line when vehicle passes at non-uniform speed

Abstract

The invention discloses a determination method of a bridge influence line when a vehicle passes at a non-uniform speed. The determination method of a bridge influence line when a vehicle passes at a non-uniform speed includes the steps: 1) acquiring response vectors of discrete measuring points of a determination influence line as needed; 2) collecting the real-time axle positional information when the vehicle passes a bridge at a non-uniform speed; 3) determining the space between the discrete measuring points of the determination influence line as needed; 4) establishing a position solutionequation of the corresponding set axle every time when collecting response, obtaining the position vector of the corrected set axle, and constructing an axle position matrix; 5) based on the axle position matrix in the step 4), establishing a vehicle load matrix; and 6) based on the response vector and the vehicle load matrix, establishing an equation, and solving the equation to obtain the bridgeinfluence line vector. The determination method of a bridge influence line when a vehicle passes at a non-uniform speed solves the problem that a traditional determination method cannot guarantee that the vehicle can pass the bridge at a uniform speed in the actual test, and solves the ill-posed problem of the bridge influence line solution equation, thus obtaining a more accurate bridge influence line.

Description

technical field [0001] The invention belongs to the technical field of civil engineering applications, and in particular relates to a method for measuring bridge influence lines when vehicles pass at non-uniform speeds. Background technique [0002] The influence line is an inherent characteristic of the bridge, with clear physical meaning and rich local information of the bridge. The measurement influence line is often included in the bridge completion experiment of the new bridge and the inspection and evaluation of the old bridge. Based on the measured results of influence lines, the rapid detection of bridge bearing capacity can be further realized. Therefore, accurate determination of the actual influence line of the bridge has important engineering application value. At present, domestic and foreign scholars have carried out some research work on the measurement method of bridge influence line. The Chinese invention patent with the notification number CN104819813B pr...

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention proposes a method for measuring bridge influence lines when vehicles pass at non-uniform speeds. On the one hand, it solves the problem that vehicles cannot accurately ensure that vehicles pass through bridges at a uniform speed in actual tests, and on the other hand, it solves the discomfort of solving equations for bridge influence lines. problem, so as to obtain a more accurate bridge influence line

Images