TITLE:
Simulation and Experiment Study on the Bridge Deflection Measuring Method Based on Secant Inclination
AUTHORS:
Yi Wu, Jing Li
KEYWORDS:
Bridge Deflection, Measurement, Inclination, Experiment Of Deflection Measurement
JOURNAL NAME:
Open Journal of Civil Engineering,
Vol.12 No.3,
September
28,
2022
ABSTRACT: Deflection is the most direct indicator that reflects the bearing
capacity of the bridge and the overall stiffness. There are many ways to measure
the deflection of Bridges, and the inclination angle method is the most
commonly used indirect method, but the existing theory of inclination angle
method is relatively complicated. Based on the facts of the bridge small
inclination, this article proposes the method of obtaining the bridge
deflection by the inclination of the secant line constructed from the adjacent
measurement points. Firstly, according to the bending deformation curve of
general simply supported beam, the deflection calculation formula of each
measuring point is derived based on the assumption of small deformation and the
inclination Angle of measuring point. Secondly, a large commercial finite
element software ANSYS 10.0 is used to carry out numerical simulation on the
simply-supported beam under concentrated load in mid-span, and the deflection
results of the numerical simulation are compared and verified with the
theoretical results of the proposed method. Finally, the measured deflection
results of the simply-supported beam model under mid-span load are compared
with the theoretical results of the proposed method. The verification results
show that if the actual model is consistent with the theoretical model, the
proposed method has good accuracy.