Research on Deformation Detection of Expressway Steel Plate Composite Beams Under Reciprocating Load
The deformation of highway steel plate composite beams is usually relatively small,resulting in inaccurate detection results of bending moment,deformation,and lateral displacement.Therefore,research is conducted on defor-mation detection methods of highway steel plate composite beams under reciprocating loads.The boundary equation un-der the action of reciprocating load is constructed,and the transverse force of the composite beam connection compo-nents in the elastic interlayer is calculated by using this equation,and the deformation detection value is determined by combining the transverse force.Build an error matrix between the deformation detection value and the actual value,use Kalman filtering method to estimate the bending moment of the steel plate composite beam,and combine the bend-ing moment and error matrix to determine the degree of deformation of the composite beam,achieving deformation de-tection of the highway steel plate composite beam.The experimental results show that the reverse and forward bending moments detected by this method are both 340 kN·m,which is consistent with the experimental data;There is only a 0.01 mm error between the maximum lateral displacement and the experimental data,which can accurately detect the deformation degree of the composite beam and provide more accurate detection results.
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