A bridge influence surface identification method considering the spatial distribution of vehicle wheel loads

Abstract

The invention belongs to the technical field of bridge safety detection, and discloses a bridge influence surface identification method considering the spatial distribution of vehicle wheel loads, including: 1) using a specific loading path to load the bridge with a calibration vehicle and collecting response data; 2) Number the two-dimensional position of the bridge and establish a mathematical model for the identification of the influence surface; 3) use the L2 regularization method to solve the identification equation of the influence surface. The present invention utilizes the actual measurement information of the bridge response caused by the loading vehicle passing the bridge through a specific path, solves the problem by numbering the two-dimensional position of the bridge and establishing a mathematical model based on it, which can greatly improve the accuracy of identifying the influence line; At the same time, the invention can effectively reconstruct boundaries that cannot be identified by traditional methods, and has good engineering practical value.

Description

technical field [0001] The invention belongs to the technical field of bridge safety detection, and in particular relates to a bridge influence surface recognition method considering the spatial distribution of vehicle wheel loads. Background technique [0002] Bridge is a key project in many traffic systems, and its performance changes have attracted more and more attention. Structural identification is a technique to detect structural information from loads and structural responses, which plays an important role in the performance evaluation of bridges. The bridge influence surface is a concept extended from the bridge influence line. The bridge influence surface is defined as follows: When the unit concentrated load passes through the bridge, the response curve at a certain point of the bridge is called the bridge influence surface. From the influence line to the influence surface, the concept is extended from one dimension to two dimension, that is, the unit concentrat...

AI Technical Summary

Problems solved by technology

However, for the identification method of the influence surface, the existing methods often regard the vehicle load as a concentrated load or a line load, regardless of the geometric size of the vehicle

This often results in a part of the influence coefficient of the bridge boundary not being identified

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