The paper presents a case study of a system identification using vibration data of a bridge with a total length of approximately 33 m. It covers the determination of dynamic parameters (natural frequencies, mode-shapes, and damping parameters). Due to the lack of documentation, it was first necessary to perform a 3D laser scanning of the investigated structure in order to model the structure in FEM software. The initial results of the numerical calculations were used to prepare the measurements. After that, dynamic measurements were performed with various numbers of sensors. Data obtained from sensors were processed using Fast Fourier Transformation and Stochastic Subspace Identification. The achieved results were compared to each other. This comparison was based on a number of sensors used.

1.
Slovak road administration (SSC)
,
Road bridges and structures-spreadsheets
.
State of the road infrastructure of Slovak republic
to date 1.1.2022,
13
22
(
2022
).
2.
G.
Standoli
et al, “
Model Updating of Historical Belfries Based on Oma Identification Techniques
,”
Int. J. Archit. Herit.
,
15
,
132
156
(
2020
).
3.
R.
Brincker
and
C.E.
Ventura
, “Introduction,” In
Introduction to Operational Modal Analysis
, (
John Wiley & Sons, Ltd
.,
Chichester
,
2015
), pp.
1
16
.
4.
Z.I.
Turksezer
et al, “
Development and Implementation of Indicators to Assess Bridge Inspection Practices
,”
J. Constr. Eng. M.
147
(
2021
).
5.
N.J.
Bertola
and
I. F.C.
Smith
, “
A methodology for measurement-system design combining information from static and dynamic excitations for bridge load testing
,”
J. Sound Vib.
463
(
2019
).
6.
R.P.
Finotti
et al, “
Numerical and Experimental Evaluation of Structural Changes Using Sparse Auto-Encoders and SVM Applied to Dynamic Responses
,”
Appl. Sci.
11
,
11965
(
2021
).
7.
A.
Anžlin
et al, „Condition Monitoring of External Prestressing Tendons on a Concrete Multi-span Highway Viaduct,“ in
Lecture Notes in Civil Engineering, Proceedings of the 1st Conference of the European Association on Quality Control of Bridges and Structures
, edited by
C.
Pellegrino
et al
(
Springer International Publishing
,
2022
), pp.
642
650
.
8.
B.
Graybeal
and
M.
Davis
, “
Cylinder or Cube: Strength Testing of 80 to 200 MPa (11.6 to 29 ksi) Ultra-High-Performance Fiber-Reinforced Concrete
,”
ACI Mater. J.
105
,
603
609
(
2008
).
9.
J.N.
Pacheco
et al, “
Probabilistic Conversion of the Compressive Strength of Cubes to Cylinders of Natural and Recycled Aggregate Concrete Specimens
,”
Materials
12
,
280
(
2019
).
10.
Eurocode 2: Design of concrete structures-Part 1-1: General rules and rules for buildings
,
2004
.
11.
L.
Hanbing
et al, “
Effect of Temperature Variation on Modal Frequency of Reinforced Concrete Slab and Beam in Cold Regions
,”
Shock. Vib.
2016
(
2016
).
12.
M.
Venglár
and
K.
Lamperová
, “
Effect of the Temperature on the Modal Properties of a Steel Railroad Bridge
,"
Slovak Journal of Civil Engineering
29
,
1
8
(
2021
).
13.
M.
Venglár
, “
Dynamic Tests for System Identification of Bridges
,” Ph.D. thesis,
Slovak University of Technology in Bratislava
,
2018
.
This content is only available via PDF.
You do not currently have access to this content.