Temperature distribution in different bridges types based on data from SHM systems

2021 ◽  
Author(s):  
Jan Biliszczuk ◽  
Maciej Hildebrand ◽  
Marco Teichgraeber ◽  
Hanna Onysyk
Keyword(s):  
Temperature Distribution ◽  
Monitoring Systems ◽  
Temperature Changes ◽  
Cable Stayed Bridge ◽  
Stay Cables ◽  
Bridge Structures ◽  
Temperature Impact ◽  
Materials Used ◽  
Long Term Observation

<p>Monitoring systems have given the possibility of varied and long-term observation of bridge structures. The paper prestents the analysis of temperature impact on various bridge elements. The data comes from three different large bridges in Poland, equipped with extensive monitoring systems, namely from an arch bridge in Puławy (built in 2008), cable-stayed bridge in Płock (built in 2005) and the cable-stayed bridge in Wrocław (built in 2011). After few years of observation an enormous and valuable database of measured parameters was stored. The analysis shows how temperature changes between individual bridge components (e.g. between decks, pylon and stay cables) affect the structure mechanical behaviour and whether the influence fulfil the standards’ recommendations. Due to various static schemes and materials used in the described bridges, individual and non-typical impact of thermal loads is expected.</p>

scholarly journals SHM System and a FEM Model-Based Force Analysis Assessment in Stay Cables

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 1927
Author(s):  
Jan Biliszczuk ◽  
Paweł Hawryszków ◽  
Marco Teichgraeber
Keyword(s):  
Measured Data ◽  
The Finite Element Method ◽  
Force Analysis ◽  
Fem Model ◽  
Temperature Changes ◽  
The Third ◽  
Cable Stayed Bridge ◽  
Stay Cables ◽  
Durability Assessment ◽  
Cable Stays

The Rędziński Bridge in Wrocław is the biggest Polish concrete cable-stayed bridge. It is equipped with a large structural health monitoring (SHM) system which has been collecting the measured data since the bridge opening in the year 2011. This paper presents a comparison between the measured data and the finite element method (FEM) calculations, while taking into account 7 years of data collection and analyses. The first part of this paper concerns the SHM application. In the next part, which contains comparisons between forces in cables and temperature changes throughout the structure, the measured data are presented. The third part includes SHM-based calculations and simulations with a complex FEM model to check the measured data and to estimate future measurements. The last part contains a durability assessment calculation for the cable stays.

A Study on the Problems with Long-Term Bridge Monitoring Systems, and Suggested Solutions

2008 ◽  
Vol 47-50 ◽  
pp. 53-56
Author(s):  
Ki Tae Park
Keyword(s):  
Monitoring System ◽  
Large Scale ◽  
Fiber Optic Sensor ◽  
Sensor Technology ◽  
Monitoring Systems ◽  
Bridge Monitoring ◽  
Problems And Solutions ◽  
Bridge Structures ◽  
Bridge Monitoring System

The first long-term bridge monitoring system in Korea was installed in 1995, and many bridges have been maintained by long-term monitoring systems. Recently, reliability of data and cost effectiveness have been increased by advanced sensor technology (fiber optic sensor, RFID, USN etc) and measuring equipment. In Korea, the large-scale project for the safety network integration for long-term smart monitoring systems for bridge structures started in 2007, and this is the second year of the project. In this system, various innovative sensor types are considered. To increase the effectiveness of this network system, an analysis of the problems with the conventional long-term bridge monitoring system and solution investigations are needed. The biggest problems are low durability and data reliability because of noise, and the lack of data applications techniques. Therefore, in this paper, a brief summary of the projects is presented and the state of bridge monitoring systems in Korea is investigated, and various problems and solutions for these problems are briefly suggested.

scholarly journals Innovative aspects in developing bridge monitoring systems

2018 ◽  
Vol 216 ◽  
pp. 01009 ◽  
Author(s):  
Andrey Yashnov ◽  
Pavel Kuzmenkov
Keyword(s):  
Systematic Approach ◽  
Operational Reliability ◽  
Design Parameters ◽  
Monitoring Systems ◽  
Bridge Monitoring ◽  
Strain Behavior ◽  
Status Monitoring ◽  
Accumulated Damage ◽  
Bridge Structures

The average age of bridges in operation and their accumulated damage are ever increasing, while design solutions of new bridges are increasingly complex. It is difficult to adequately reflect performance characteristics of these structures in design models. In order to prevent accidents during construction and operation, it is necessary to verify experimentally that the actual stress-strain behavior corresponds to design parameters. Special monitoring systems are developed and implemented to improve the operational reliability of structures. This study uses mathematical modeling and instrumental measurements to develop monitoring systems. A systematic approach has been implemented. The paper presents the results produced by modern automated measuring, recording and data processing equipment to provide online diagnostics and long-term status monitoring of bridge structures.

Monitoring, analysis and durability assessment of a concrete cable-stayed bridge

2019 ◽  
Author(s):  
Jan Biliszczuk ◽  
Paweł Hawryszków ◽  
Marco Teichgraeber
Keyword(s):  
Measured Data ◽  
Box Girders ◽  
Unusual Structure ◽  
Fem Model ◽  
Temperature Changes ◽  
Cable Stayed Bridge ◽  
Stay Cables ◽  
Durability Assessment ◽  
Health Monitoring Systems ◽  
Cable Stays

<p>Over the last 20 years big bridges in Poland have been built and equipped in Structural Health Monitoring systems (SHM). One of those objects is the Rędziński Bridge in Wrocław. It is a cable-stayed concrete bridge built along the motorway A8 in 2011. Since this time the SHM has been collecting data from 222 installed sensors. The bridge is outstanding because of its unusual structure: two separate concert box girders are suspended to a single pylon. The connection is made of 160 stay cables – so this is also the most sensitive part of the structure.</p><p>The first part of the paper concerns the SHM application. In the next part the measured data form the period 2011-2017 are presented, containing comparisons between forces in cables and temperature changes in the whole structure. The third part will include SHM based calculations and simulations with a complex FEM model, to check the measured data and to estimate future measurements. The last part contains the durability assessment calculation for the cable stays.</p>

Rolling Resistance Calculation Procedure Using the Finite Element Method

2019 ◽  
Vol 48 (3) ◽  
pp. 224-248
Author(s):  
Pablo N. Zitelli ◽  
Gabriel N. Curtosi ◽  
Jorge Kuster
Keyword(s):  
Finite Element ◽  
Energy Dissipation ◽  
Rolling Resistance ◽  
Element Model ◽  
The Finite Element Method ◽  
Temperature Changes ◽  
Rubber Compounds ◽  
Different Temperatures ◽  
Materials Used ◽  
Account Temperature

ABSTRACT Tire engineers are interested in predicting rolling resistance using tools such as numerical simulation and tests. When a car is driven along, its tires are subjected to repeated deformation, leading to energy dissipation as heat. Each point of a loaded tire is deformed as the tire completes a revolution. Most energy dissipation comes from the cyclic loading of the tire, which causes the rolling resistance in addition to the friction force in the contact patch between the tire and road. Rolling resistance mainly depends on the dissipation of viscoelastic energy of the rubber materials used to manufacture the tires. To obtain a good rolling resistance, the calculation method of the tire finite element model must take into account temperature changes. It is mandatory to calibrate all of the rubber compounds of the tire at different temperatures and strain frequencies. Linear viscoelasticity is used to model the materials properties and is found to be a suitable approach to tackle energy dissipation due to hysteresis for rolling resistance calculation.

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