Bridge influence surface identification method considering vehicle wheel load spatial distribution

Abstract

The invention belongs to the technical field of bridge safety detection, and discloses a bridge influence surface identification method considering vehicle wheel load spatial distribution, which comprises the following steps: 1) loading a bridge with a calibration vehicle by adopting a specific loading path, and collecting response data; 2) numbering the two-dimensional positions of the bridge andestablishing a mathematical model of influence surface identification; and 3) solving the influence surface identification equation by adopting an L2 regularization method. According to the method, actual measurement information of a loading vehicle passing through a bridge of a specific path and bridge response caused by the loading vehicle is utilized, solving is carried out through a bridge two-dimensional position number and a mathematical model established on the basis of the bridge two-dimensional position number, and the influence line recognition precision can be greatly improved; meanwhile, the boundary which cannot be recognized by a traditional method can be effectively reconstructed, and the method 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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