<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This paper analyses displacements of a shell in a soil-steel bridge subjected to quasi-static moving loads. The considerations relate to a large span structure located in Ostróda, Poland. In particular, shell displacements during a loading cycle consisting of consecutive passages of a pair of trucks over the bridge are investigated. The results of a full-scale test, that is, the readings from a system of strain gauges arranged along the shell circumferential section, are the basis for determination of shell displacements. The proposed algorithm makes it possible to calculate any component of the displacement using just a simple model of the shell in the form of a linear elastic curvilinear beam. The approach uses real measurements, and thus, it yields results of displacements reflecting the actual mechanical behaviour of the entire composite structure including not only the shell, but also the backfill, the pavement, etc. The calculated state of displacement sets the basis for calibration of the numerical model. Finite element (FE) analyses include staged construction, that is, backfilling the shell by placing successive soil layers, as well as the loading test with the vehicles moving over the bridge. It is demonstrated that the ballasting of the shell during backfilling contributes to the improvement of the simulated behaviour of the object at the stage of operation, that is, when subjected to moving truck load. Thus, the calibration of the FE model is successfully carried out using the results of strain gauge measurements.</p>
</abstract>

This paper analyses displacements of a shell in a soil-steel bridge subjected to quasi-static moving loads. The considerations relate to a large span structure located in Ostróda, Poland. In particular, shell displacements during a loading cycle consisting of consecutive passages of a pair of trucks over the bridge are investigated. The results of a full-scale test, that is, the readings from a system of strain gauges arranged along the shell circumferential section, are the basis for determination of shell displacements. The proposed algorithm makes it possible to calculate any component of the displacement using just a simple model of the shell in the form of a linear elastic curvilinear beam. The approach uses real measurements, and thus, it yields results of displacements reflecting the actual mechanical behaviour of the entire composite structure including not only the shell, but also the backfill, the pavement, etc. The calculated state of displacement sets the basis for calibration of the numerical model. Finite element (FE) analyses include staged construction, that is, backfilling the shell by placing successive soil layers, as well as the loading test with the vehicles moving over the bridge. It is demonstrated that the ballasting of the shell during backfilling contributes to the improvement of the simulated behaviour of the object at the stage of operation, that is, when subjected to moving truck load. Thus, the calibration of the FE model is successfully carried out using the results of strain gauge measurements.

Displacements of shell in soil-steel bridge subjected to moving load: determination using strain gauge measurements and numerical simulation

Wrocław University of Science and Technology

Studia Geotechnica et Mechanica

This work is licensed under the Creative Commons Attribution 4.0 International License.

This paper analyses displacements of a shell in a soil-steel bridge subjected to quasi-static moving loads. The considerations relate to a large span structure...

Corrugated steel sheet

Young’s modulus	210,000 MPa
Poisson ratio	0.3
Moment of inertia	9.05∙10⁻⁵ m⁴/m
Sectional area	1.45∙10⁻² m²/m
Unit weight (with ballasting)	77 (3080) kN/m³

Backfill soil

Young’s modulus	150 MPa
Poisson ratio	0.25
Cohesion	5 kPa
Friction angle	34°
Dilatancy angle	9°
Unit weight	19 kN/m³

Displacements of shell in soil-steel bridge subjected to moving load: determination using strain gauge measurements and numerical simulation

Article Category: Original Study

Data publikacji: 31 mar 2022

Zakres stron: 26 - 37

Otrzymano: 23 kwi 2021

Przyjęty: 04 paź 2021

DOI: https://doi.org/10.2478/sgem-2021-0028

Słowa kluczowe
soil-steel structure, moving load, strain gauge

© 2022 Czesław Machelski et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

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Figure 13

Mechanical parameters used in the computations.

Displacements of shell in soil-steel bridge subjected to moving load: determination using strain gauge measurements and numerical simulation

Article Category: Original Study

Data publikacji: 31 mar 2022

Zakres stron: 26 - 37

Otrzymano: 23 kwi 2021

Przyjęty: 04 paź 2021

DOI: https://doi.org/10.2478/sgem-2021-0028

Słowa kluczowesoil-steel structure, moving load, strain gauge

© 2022 Czesław Machelski et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Mechanical parameters used in the computations.

Słowa kluczowe
soil-steel structure, moving load, strain gauge