11TH INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2013: ICNAAM 2013, 2013
Importance of the bridge structures as components of the transportation network is increasing and... more Importance of the bridge structures as components of the transportation network is increasing and requires regular development of the management methodology. The main activities are focused on the safety of the users of the transportation network and on the safety of structures, based on monitoring and analysis of the bridge condition changes caused by various types of defects. The paper presents application of the hybrid network technology in the expert tool NOBLA supporting condition assessment of bridge plate girders, taking into account defects of the structures.
The paper presents a complex analysis of an old railway backfilled concrete arch bridge located i... more The paper presents a complex analysis of an old railway backfilled concrete arch bridge located in Rybnik, Poland. The study includes experimental and numerical assessment of the structure aimed at evaluation of precise functional conditions for the bridge further exploitation since all the previous analyses indicated its deficient load carrying capacity and operating speed. It is related to increased requirements for the predicted traffic collated with a very poor technical condition of the bridge. Specific features of the considered structure are very narrow and long arch spans exceeding 30 m, unreinforced concrete material and intensive cracking of the superstructure in numerous sections.
INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015), 2016
This paper is focused on the progress in the application of Expert Tools supporting integration o... more This paper is focused on the progress in the application of Expert Tools supporting integration of inspection and NDT testing findings in order to effectuate effective decision making by bridge owners. Possibilities of knowledge representation in the intelligent computer Expert Tools by means of the multi-level hybrid network technology are described. These multi-level hybrid networks can be built of neural, fuzzy and functional components depending on the problem that needs to be solved and on the type of available information. Application of the technology is illustrated by an example of the Bridge Evaluation Expert Function (BEEF) implemented in the Railway Bridge Management System “SMOK” operated by the Polish State Railways.
The paper presents the Structural Health Monitoring system installed on the posttensioned concret... more The paper presents the Structural Health Monitoring system installed on the posttensioned concrete road bridge over the Odra River in Poland. The bridge superstructure has a form of the 5‐span box girder with skewed supports, built using the cantilever method. During operation of the bridge (since 2010) many cracks arrived in the superstructure, mainly within the main bridge span with a length of 140 m. Therefore, as a part of a complex diagnostic process, the monitoring system were incorporated for assessment of the bridge performance and for observing further propagation of damage. The implemented monitoring system utilizes Fiber Bragg Grating (FBG) technique for measuring of strains, changes of cracks width and angular displacements of concrete box girder for various operating conditions of the structure including effects of regular road traffic, environmental influences and rheological phenomena. The paper presents applied testing and measuring procedures as well as results of t...
11TH INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2013: ICNAAM 2013, 2013
Importance of the bridge structures as components of the transportation network is increasing and... more Importance of the bridge structures as components of the transportation network is increasing and requires regular development of the management methodology. The main activities are focused on the safety of the users of the transportation network and on the safety of structures, based on monitoring and analysis of the bridge condition changes caused by various types of defects. The paper presents application of the hybrid network technology in the expert tool NOBLA supporting condition assessment of bridge plate girders, taking into account defects of the structures.
The paper presents a complex analysis of an old railway backfilled concrete arch bridge located i... more The paper presents a complex analysis of an old railway backfilled concrete arch bridge located in Rybnik, Poland. The study includes experimental and numerical assessment of the structure aimed at evaluation of precise functional conditions for the bridge further exploitation since all the previous analyses indicated its deficient load carrying capacity and operating speed. It is related to increased requirements for the predicted traffic collated with a very poor technical condition of the bridge. Specific features of the considered structure are very narrow and long arch spans exceeding 30 m, unreinforced concrete material and intensive cracking of the superstructure in numerous sections.
INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015), 2016
This paper is focused on the progress in the application of Expert Tools supporting integration o... more This paper is focused on the progress in the application of Expert Tools supporting integration of inspection and NDT testing findings in order to effectuate effective decision making by bridge owners. Possibilities of knowledge representation in the intelligent computer Expert Tools by means of the multi-level hybrid network technology are described. These multi-level hybrid networks can be built of neural, fuzzy and functional components depending on the problem that needs to be solved and on the type of available information. Application of the technology is illustrated by an example of the Bridge Evaluation Expert Function (BEEF) implemented in the Railway Bridge Management System “SMOK” operated by the Polish State Railways.
The paper presents the Structural Health Monitoring system installed on the posttensioned concret... more The paper presents the Structural Health Monitoring system installed on the posttensioned concrete road bridge over the Odra River in Poland. The bridge superstructure has a form of the 5‐span box girder with skewed supports, built using the cantilever method. During operation of the bridge (since 2010) many cracks arrived in the superstructure, mainly within the main bridge span with a length of 140 m. Therefore, as a part of a complex diagnostic process, the monitoring system were incorporated for assessment of the bridge performance and for observing further propagation of damage. The implemented monitoring system utilizes Fiber Bragg Grating (FBG) technique for measuring of strains, changes of cracks width and angular displacements of concrete box girder for various operating conditions of the structure including effects of regular road traffic, environmental influences and rheological phenomena. The paper presents applied testing and measuring procedures as well as results of t...
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Papers by Mieszko Kużawa