Composition based on recording the vibrations in the structure of bridges from around the world. A sonic sculpture creating a collective space for reflection as you pass through the bell tower into the Church of our Lady.
Contemplating the bridge from the everyday to eternity.
I klokketårnet på Vår Frue kirke blir det urpremiere på en helt ny lydinstallasjon med lyden av vibrasjoner fra Den australske lydkunstneren Jodi Rose er kjent for sitt broprosjekt Singing Bridges, der hun lager verk basert på vibrasjonene til brovaiere over hele verden. Det nye verket Signal on the Silver Bridge er basert på opptak av vibrasjonene i strukturen til tre norske gangbroer. Rose skaper et særegent sonisk rom i klokketårnet til Vår Frue kirke som antyder broer vi ikke vet hvor fører hen. broer.
Commissioned by Bjørnar Habbestad for Only Connect NyMusikk Festival, ‘Come What May’’ 2021 Edition in Trondheim. Jodi Rose designed a site-specific installation composed with her archive of global bridges for the Church of our Lady bell tower.
The Global Bridge Symphony is supported by APRA AMCOS Art Music Fund.
Thanks to the Ny Musikk team, NTNU, KiT, Øyvind Brandtsegg, David Rych, Alex Murray-Leslie, Jacob Jessen, Mari Bastashevski, Jordan Sand and Øystein Fjeldbo.
Jodi Rose is an artist, composer and creative director of Singing Bridges, an urban sonic sculpture playing the cables of bridges as musical instruments on a global scale, connecting bridges around the world in a Global Bridge Symphony. Rose is studying Artistic Research (MFA) in Art & Technology at Trondheim Art Academy, Norway.
Structural Health Monitoring | HBMModular Solution for Efficient Structural Health Monitoring. All structures, whether bridges, wind energy plants, water, gas and oil pipelines, tunnels, oil rigs, pavements, rails, but also ships, planes, trains or others are subject to various internal and external factors which may cause wear or malfunction.This can happen, for example due to deterioration, an incorrect construction process …www.hbm.com
Modular Solution for Efficient Structural Health Monitoring
All structures, whether bridges, wind energy plants, water, gas and oil pipelines, tunnels, oil rigs, pavements, rails, but also ships, planes, trains or others are subject to various internal and external factors which may cause wear or malfunction. This can happen, for example due to deterioration, an incorrect construction process, lack of quality control or an extreme situation resulting from an accident or environmental load. To be able to observe these changes in the material and to react in a proper way before serious damage is caused, the implementation of a damage identification system is crucial. The monitoring of structural behavior can detect anomalies in time, thus enabling maintenance and repair actions to be implemented more efficiently, with a direct impact on the reduction of operating costs. Replacing schedule-driven maintenance with condition-based maintenance is the main goal of infrastructure monitoring providing the following benefits.
Your local sales office:
+47 48 300 700
HBK Norway Great Belt Suspension Bridge, Denmark
Supply of FBG accelerometers for prediction of bridge cable vibrations
Gaining Real Insight into a Structure’s Health
Civil engineering structures are withstanding an exponential increase of applied loads, impacts and environmental burdens. The assessment of the resulting structural behavior is becoming mandatory so that faults can be detected in the early stages and safety is guaranteed.
Visual inspections do not give enough information to extend the structure’s lifetime, but by monitoring the structural health, any anomalies can be detected in time. This will optimize maintenance and reduce operating costs.
Monitor your entire structure’s life-cycle – from its design, construction, and operation to its rehabilitation or end-of-service life using HBM turnkey solutions for:
Material testing and load assessment
Strain and temperature distribution
Convergences and vibration estimation
Displacements, deflections, and rotation measurements
Continuous monitoring
BRIDGE MONITORING
Bridge design validation
Bridge load assessment
Bridge short-term monitoring during construction
Bridge long-term structural health monitoring
Mezcala Cable-Stayed Bridge, MexicoSupply of FBG accelerometers for structural monitoring systemTrans-Rhumel Cable-Stayed Bridge, Algeria
Supply of complete optical measurement system for SHM
The new continuing education course at , “Structural Health Monitoring (SHM)”, is very relevant for professionals who design large and complex bridges and buildings, or work with the detection of damage to various building structures. For example, bridges should be monitored at regular intervals to ensure the safety of the users and the environment. The bridges age and are often exposed to higher traffic, train and freight loads than they were originally designed for.
STRUCTURAL HEALTH MONITORING OF BRIDGES IN SWEDEN – RoctestFUNCTION AND RESULTS Using these new techniques in the field created a lot of problems, especially during the construction period. Serious malfunctions could jeopardise the function and quality of the system and were keenly reported in order to examineroctest.com
Frontiers | System Identification of Large-Scale Bridges Using Target-Tracking Digital Image Correlation | Built EnvironmentThis paper characterizes the extensive research activities conducted in the Earthquake Engineering Laboratory of University of Nevada, Reno, in the field of dynamic monitoring and system identification of three 1/3-scale two-span bridges. The first part of the study briefly presents the verification of target-tracking Digital Image Correlation (DIC) results as compared to conventional sensors …www.frontiersin.org
Quasi-Self-Powered Piezo-Floating-Gate Sensing Technology for Continuous Monitoring of Large-Scale Bridges
The collapse of the Polcevera bridge in Italy represents a serious event which seems to be a direct result of cumulated local damages due to the aggressive environment of the construction site. Recently, evidence of corrosion of both ordinary and post-tension steel reinforcements were detected, in addition to concrete carbonation. Such phenomena generally lead to an increase in the deformation of all the elements of the bridge structure, which start to increase in time, leading to a progressive deterioration of the overall system. As a consequence, a proper structural monitoring layout would provide an extremely useful tool, for a correct plan of maintenance for all the elements of the considered infrastructure. In this work, strategies for the definition of structural health monitoring systems for bridges are discussed, from both software and hardware points of view. More specifically, a Cloud computing interface is considered, to make recorded data available for further analyses and post-processing procedures. The presented definition of the monitoring architecture could lead to the proper maintenance of all the structural elements, preventing the unexpected collapse of the structure.
Structural Health Monitoring – Do you need to test the integrity of a structure over time?
The company was founded March 1, 1999 as a spin-off from Aalborg University in Denmark. Our patented software is today used e.g. by mechanical engineers for modal analysis of operating machinery and components, and by civil engineers for ambient vibration analysis of large structures like bridges and buildings.
Structural Vibration Solutions A/S is located at NOVI Science Park, which is one of northern Europe’s most respected science parks. The location plays an important role as NOVI Science Park secures the close relations between the company and the research from Aalborg University.
About – Structural Vibration Solutions The company was founded March 1, 1999 as a spin-off from Aalborg University in Denmark. Our patented software is today used e.g. by mechanical engineers for modal analysis of operating machinery and components, and by civil engineers for ambient vibration analysis of large structures like bridges and buildings.svibs.com
Structural Monitoring Solutions
Structural Health Monitoring Systems (SHM)
Most companies rest on their technology laurels. Not SMS, as we partner with the best universities, engineering firms, the most progressive DOTs and other proven manufacturing leaders in the field of asset management. As a bridge owner, you get answers to your problems, not data. By using fiber optics, you need fewer power drops, less installation labor, and maintenance. This technology is ruggedized so you’re not procuring a replacement system in several years. You can trust us as we have 30 years of equipment manufacturing, SHM project management, data analysis, and expertise allow owners access to all the luxuries of SHM, at a cost-effective price.
Cable Stays | Structural Health MonitoringLaser Focused Cable Stays are difficult to inspect in critical areas. Acoustic monitoring provides a 100% volumetric 24/7 inspection. Many DOTs have adopted monitoring and others are actively planning an installation.www.smsshm.com
HOME | SMS SHMStructural Health Monitoring (SHM) Most companies rest on their technology laurels. Not SMS, as we partner with the best universities, engineering firms, the most progressive DOTs and other proven manufacturing leaders in the field of asset management.www.smsshm.com
Genoa Bridge in Italy
For the Ponte Morandi bridge, Acoustic Monitoring would have given warning of the bridge collapse as the Associated Press stated that Italian engineers knew of problems with the Genoa Bridge since 1979.
Structural Health Monitoring for Bridge Structures | FPrimeC Solutions Inc.In this article, we will briefly review the fundamentals of structural health monitoring for bridge structures.Bridges and transportation infrastructure are subjected to extreme environmental loading conditions, such as snow, rain, storm, and extreme heat.www.fprimec.com
Sensors for Structural Health Monitoring | FPrimeC Solutions Inc.With recent advancements in Sensor technology, Structural Health Monitoring (SHM) systems have been developed and implemented in various civil structures such as bridges, buildings, tunnels, power plants, and dams. Many advanced types of sensors, from wired to wireless sensors, have been developed to continuously monitor structural condition through real-time data collection.www.fprimec.com
MISTRAS Structural Monitoring
MISTRAS, STARTED OUT IN 1978 MANUFACTURING MONITORING SYSTEMS AND SENSORS…
MISTRAS offers a complete and fully integrated structural monitoring service from design to data analysis. Our structural and process engineers are able to assess customers technical needs and propose a range of monitoring options from a wide range of systems and sensors. Using the latest open source software integrated into MISTRAS systems we are able to collect, analyse, manage and present findings of monitoring accurately and concisely. This provides our customers valuable information to allow effective asset management. We work opening and honestly to provide reliable, accurate and best value. https://mistrasgroup.co.uk/bridges-structures-structural-monitoring/
Structural Monitoring of Bridges and Structures- Mistras Group MISTRAS offers a comprehensive range of monitoring, inspection and site services for bridges and structures in a wide variety of industries. We work with customers providing one-source solutions, for structures from their initial construction to management towards the latter part of service life.mistrasgroup.co.uk
MISTRAS offers a comprehensive range of monitoring, inspection and site services for bridges and structures in a wide variety of industries. We work with customers providing one-source solutions, for structures from their initial construction to management towards the latter part of service life. From basic inspection and traditional NDT, to cutting-edge advanced NDT and long-term structural health monitoring, we have a wide range of tools to utilise. Our unique mix of degree-educated and chartered civil & structural engineers, experienced bridge inspectors, NDT experts (PCN, ASNT Level 2 and 3) and specialists monitoring division combine into comprehensive team that provide the highest standard inspection solution that you need.
We provide accurate comprehensive information and knowledge about structural condition, material properties, defects, and integrity that assists effective asset management, whole life costing and safety. MISTRAS has extensive expertise in the assessment of materials including steel, concrete, cables, composites and damage such as corrosion, cracking, scour and wire break. In addition our pool of site operatives can offer skills and capability to you, such as rope access services, slinger/banksman, confined space workers, confined space rescue teams and managers, first aiders/medics, concrete repair, small scale civils, installation of site telecoms and site network
MISTRAS has extensive experience in the application of wire break monitoring to:
Suspension bridges
Cable stay bridges
Post tension beams, slabs and box girders
Flexible risers
We provide a full design service, experienced installation teams, including IRATA, confined space, offshore certified. Once installed, we provide full remote system management, reporting, long-term support and maintenance. MISTRAS offer a completely open service and can demystify the technology and process. We can show clients our full design process, example wire breaks and our analysis procedures to provide full reassurance in the technology and service we provide.
ANZAC Bridge (Pyrmont/Rozelle, 1995) | StructuraeANZAC Bridge is a motorway bridge / freeway bridge, cable-stayed bridge with semi-fan system and prestressed concrete bridge that was built from 1992 until 1995. The project is located in Pyrmont and Rozelle, Municipality of Leichhardt, Sydney, New South Wales, Australia.structurae.net
ANZAC Bridge | Australia | Sixense Context. The ANZAC Bridge is an eight-lane cable-stayed bridge in the west of Sydney. The bridge is 32.2m wide and the main span is 345m long. The reinforced concrete pylons are 69m high and support the deck by two planes of stay cables.The bridge can carry a maximum of 180,000 cars per day and is a critical infrastructure of the global Sydney road network.www.sixense-group.com
Project summary
Service provided: ANZAC bridge monitoring
Location: Sydney, Australia
Client: Transport for NSW, Freyssinet Australia Period of the service: 2011Sixense solutions used:
The Rion-Antirion bridge (Harilaos Trikoupis Bridge) links mainland Greece to Peloponnese at the west side of the Corinthe Gulf near Partas. It is 2.2 km long, supported by 4 diamond shaped pylons.
The environment in which the bridge was constructed combines a number of physical challenges and thus makes this project particularly complex: a strait of about 2,500m width, deep water (up to 65m) combined with deep soil strata of weak alluviums, possibility of strong seismic activity, tectonic movements and adverse high wind actions.
A Structural Health Monitoing (SHM) system was specially designed to survey the behaviour of the bridge subjected to this difficult environment.
Real-time and history
Installed in 2004, the monitoring sytem provides highly reliable and useful information about events occurring on the bridge and the response of the structure.
Real time alerts as well as a database of historical information allows the concessionnaire, Gefyra, to secure the daily service, optimise the periodic maintenance and ultimately asess and extend the design life of the structure.
In particular the SHM system provided:
alerts concerning exesssive stay cable vibration in 2006, resulting in an upgrade of the structure with cable dampers which reduced the amplitude of vibration by four
verification of the remaining fatigue design life of cable gussets using the historical database of cable loading
optimisation of data by using a smart algorithm which record high sampling data file during specific seismic events.
Structural Health Monitoring (or SHM) uses permanently installed sensors to generate continuous data. A specific software enables to display the data in smart graphics and generates alerts. It is used in conjunction with spot check inspections to enable relevant structural data analysis. Its aim is to maintain infrastructures, extend their working lives, and detect and forecast their faults.
We monitor the structure and its environment (usage, weather, etc.) simultaneously by integrating a varied range of measurements, with the majority of data being gathered automatically, including satellite measurements. The data is processed to provide relevant indicators that operators can reliably use to optimise the operation and maintenance of their structures.
Our experience allows us to conduct SHM under challenging conditions (in confined spaces, working at height, etc.) by offering durable instrumentation for a broad range of applications, including extreme environments, offshore structures and potentially explosive ATEX zones.
Structural Health Monitoring (SHM) | Sixense Structural Health Monitoring (or SHM) uses permanently installed sensors to generate continuous data. A specific software enables to display the data in smart graphics and generates alerts.www.sixense-group.com
Sixense Monitoring (Head office) Parc de l’Ile – 21 rue du Port 92022 Nanterre CEDEX Tel: +33 (0)1 41 44 85 00
Sixense Digital 280 av. Napoléon Bonaparte 92500 Rueil Malmaison Tel: +33 (0)1 47 76 42 62
Millennium Bridge | United Kingdom | Sixense 330m above the Thames. The London Millennium Bridge is a 330 m pedestrian bridge, spanning the River Thames between St. Paul’s Cathedral and the new Tate Gallery.www.sixense-group.com
Monitoring of cable-stayed and prestressed structures
Sixense has specialist expertise, tools and methods that have been specifically developed for cable-stayed and prestressed concrete structures:
Substantial knowledge of the issues around structural ageing
Robust and proven measurement solutions
Acquisition and visualisation software incorporating alerts, indicators and analyses
Acoustic monitoring for real-time detection of cable strand failures as a result of corrosion or fatigue
These solutions provide key management information for operators of simple or complex structures.
Why you should use our services:
A team of civil engineering and monitoring experts available throughout the full project life cycle The members of our team are specialists in Civil Engineering, Metrology, Electronics and Computer Science. This broad skill set gives us a clear understanding of client needs on which to develop and recommend appropriate solutions
25 years of experienceWe have a 25-year track record of assisting and supporting public- and private-sector contracting authorities from national governments and local authorities to industrial companies and concession holders in the management of their built heritage. We have more than 20,000 connected sensors worldwide installed on modest and major structures, including the Ile de Ré bridge in France, the Rion-Antirion bridge in Greece, the Russki bridge in Russia and the Bosphorus bridges in Turkey.
Our resources We can provide a complete turnkey project, from design right through to operation, including manufacturing, installation, software configuration and commissioning.
EverSense®: monitoring and analysis
A unique expertise in the instrumentation of stay-cabled and prestressed concrete structures
The power of the EverSense® solution lies in its ability to integrate and process any type of automated measurement to provide relevant indicators and dashboards to a range of different stakeholders.
Our systems are deployed worldwide to inspect and monitor structures such as bridges, offshore platforms, wind turbines and nuclear facilities.
EverSense® | SixenseThe power of the EverSense® solution lies in its ability to integrate and process any type of automated measurement to provide relevant indicators and dashboards to a range of different stakeholders. Our systems are deployed worldwide to inspect and monitor structures such as bridges, offshore platforms, wind turbines and nuclear facilities.www.sixense-group.com
Une expertise unique sur l’instrumentation des structures câblées et en béton précontraint
The competence of our teams gives us the ability to recommend solutions tailored to solving specific problems:
Corrosion and detection monitoring of reinforced and prestressed concrete structures
Crack monitoring
Fatigue risk monitoring
Early-stage detection of scouring
Risk of gantry structure collapse
EverSense® software
The members of our team are specialists in Civil Engineering, Metrology, Electronics and Computer Science.
This broad skill set gives us a clear understanding of client needs on which to develop and recommend appropriate software solutions.
EverSense® comprises a series of modules, ranging from real-time data acquisition and alert management to data exploitation via a web server.
Sensors designed to meet your needs
Sixense offers a comprehensive range of structural, hydraulic, environmental and other measurement sensors to monitor:
cable-stayed and prestressed structures
structures at risk of corrosion
structures at risk of scouring
structures at risk of ageing by fatigue
As part of providing a comprehensive, efficient and effective monitoring service, we combine many different technologies, including: electrical, electromagnetic, fibre optic, vibrating string strain gauge, acoustic and ultrasonic sensors, radar and laser measurement solutions, fully equipped surveying solutions and InSAR satellite measurement.
Our services
Deployment: hardware and software supply and installation, with skills transfer-based technical support
Support: multi-year maintenance and measurement interpretation
Training provided in the use, maintenance and processing of data, as well as ongoing structure management
Acoustic monitoring
Acoustic monitoring is the only technology available with the ability to detect cable strand failures as a result of corrosion or fatigue.
Any loss of section as a result of a failed strand can be detected and located.
Why choose our SHM solutions?
Our solutions facilitate proactive decision-making so that you can:
View the status of your structures in real time
Predict and optimise maintenance needs
Ensure user safety
Extend the operating service life of your structures
You want to know more about our expertise? We provide you customized solutions.
Our experts in Engineering, Monitoring, Mapping and Platform solutions help you manage your infrastructures throughout their entire life cycle.Conformément au règlement nᵒ 2016/679, dit règlement général sur la protection des données personnelles, le candidat dispose d’un droit d’interrogation et d’accès aux données à caractère personnel le concernant, ainsi que d’un droit de rectification de ces données. Le candidat dispose également d’un droit d’opposition. Ces droits peuvent être exercés par courrier électronique ou postal, accompagné de la copie d’un titre d’identité signé, adressé à DPO Soletanche Freyssinet – 280 avenue Napoléon Bonaparte – 92500 Rueil Malmaison.
Anzac Bridge | NSW Environment, Energy and Science SHR Criteria a) [Historical significance] Anzac Bridge has historical significance as it is a contemporary solution to the problem of conveying road traffic over Johnstons Bay, which was part of an important transport route from Sydney to the north shore and Parramatta since the mid nineteenth century, known as the five bridges route.www.environment.nsw.gov.au
Lat: -33.86888888888889 Long: 151.18555555555557
The Anzac Bridge is a world standard bridge in scale, aesthetics and design features. The experience of crossing the bridge is cathedral-like, with its vaulted canopy of stay cables. The subtle sweep of the bridge’s cantilevered deck, which links into the arterial road network and is supported at either end by monumental reinforced concrete towers, forms a striking and integral part of the Sydney skyline. It has quickly become one of the iconic images of Sydney, particularly for those who have views of it, cross it to work by road or bike, or use its highly visible towers as an aid to urban navigation.
SHR Criteria f) [Rarity]
The Anzac Bridge is the largest cable stayed bridge in NSW, and indeed Australia (other examples of cable stayed bridges in NSW are mainly footbridges).
SHR Criteria g) [Representativeness]
The Anzac Bridge is a representative example of a reinforced concrete cable stayed bridge in the state. It is currently the longest such bridge in Australia. Other, earlier examples of cable-stayed bridges are the Westgate Bridge in Victoria, and the Batman Bridge in Tasmania.
Integrity/Intactness:
Intact
Assessment criteria:
Items are assessed against the State Heritage Register (SHR) Criteria to determine the level of significance. Refer to the Listings below for the level of statutory protection.
Instrumentation plan for 56 nodes on main span of the Golden Gate Bridge
Fig. 6. Instrumentation plan for 56 nodes on main span of the Golden…Download scientific diagram | Instrumentation plan for 56 nodes on main span of the Golden Gate Bridge from publication: Design and Implementation of Scalable Wireless Sensor Network for Structural Monitoring | An integrated hardware and software system for a scalable wireless sensor network WSN is designed and developed for structural health monitoring. An accelerometer sensor node is designed, developed, and calibrated to meet the requirements for structural vibration monitoring… | Wireless Sensor Network, Monitoring and CE | ResearchGate, the professional network for scientists.www.researchgate.net
Crowdsensing Framework for Monitoring Bridge Vibrations Using Moving SmartphonesThis paper discusses new services that can be delivered to urban environments through big data generated by the public’s smartphones, enhancing the relationship between a city and its infrastructure.By Thomas J. maTarazzo, PaolosanTi, shamimn. Pakzad, krisToPher CarTer, CarloraTTi, BaBakmoaveni, Chrisosgood, andnigel JaCoB
A Wireless Sensor Network (WSN) for Structural Health Monitoring (SHM) is designed, implemented, deployed and tested on the 4200ft long main span and the south tower of the Golden Gate Bridge (GGB). Ambient structural vibrations are reliably measured at a low cost and without interfering with the operation of the bridge. Requirements that SHM imposes on WSN are identified and new solutions to meet these requirements are proposed and implemented. In the GGB deployment, 64 nodes are distributed over the main span and the tower, collecting ambient vibrations synchronously at 1kHz rate, with less than 10us jitter, and with an accuracy of 30uG. The sampled data is collected reliably over a 46-hop network, with a bandwidth of 441B/s at the 46th hop. The collected data agrees with theoretical models and previous studies of the bridge. The deployment is the largest WSN for SHM. * This work is supported by the National Science Foundation under Grant No. EIA-0122599 and by the Center for Information Technology Research in the Interest of Society (CITRIS).
14. (1 Main span, 2 side spans, 6 spans at the North Viaduct, 5 spans at the South Viaduct).
Plan Shape
Mostly straight with a curve at the South Viaduct.
Total Length
9151′ (2789.2m). Main bridge spans are 1125′ (342.9m), 4200′ (1280.2m), and 1125′ (342.9m). North viaduct spans are approx. 200′ (61.0m) with a 347′ (105.8m) anchorage housing. South viaduct spans range from 71′ (21.6m) to 320′ (97.5m).
Width of Deck
87.1′ (26.5m) to 90′ (27.4m).
Construction Date
1937 (several upgrades since 1937).
Instrumentation
1995. 69 accelerometers and 4 relative displacement sensors on the bridge, and a free-field station on the south side of the bridge.
Superstructure Type
Main span and side spans: suspended steel truss spans supported by braced steel towers. North and South Viaducts are mainly steel truss spans, with a steel arch span at the South Viaduct, supported by steel towers.
Substructure Type
Suspension spans: braced steel cellular shaft towers. 2 columns per tower. North and South Viaducts: braced steel towers and concrete pylons.
Foundation Type
Reinforced concrete piers support the main span towers.
Remarks
The bridge was instrumented under the agreement between the Golden Gate Bridge, Highway and Transportation District and DOC.
Structural Health Monitoring at the University of IllinoisAuthor Project Purpose Platform Sensor Node Energy Harvesting Nodes Accel. Strain Displ./ Crack Inclin. Wind Temp. Humid. Light CO2 Veloc. Total Sensing Channelsshm.cs.illinois.edu
Full-scale Applications
This webpage contains detailed information regarding full-scale applications of wireless sensors which can serve as a resource to the research and practitioner community. Reference papers/reports detailing the various deployments, URL for the deployments, pictures, and other information can be found here.
Testing and validation processes are critical tasks in developing a new hardware platform based on a new technology. This paper describes a series of experiments to evaluate the performance of a newly developed MEMS-based wireless sensor node as part of a wireless sensor network (WSN). The sensor node consists of a sensor board with four accelerometers, a thermometer and filtering and digitization units, and a MICAz mote for control, local computation and communication. The experiments include calibration and linearity tests for all sensor channels on the sensor boards, dynamic range tests to evaluate their performance when subjected to varying excitation, noise characteristic tests to quantify the noise floor of the sensor board, and temperature tests to study the behavior of the sensors under changing temperature profiles. The paper also describes a large-scale deployment of the WSN on a long-span suspension bridge, which lasted over three months and continuously collected ambient vibration and temperature data on the bridge. Statistical modal properties of a bridge tower are presented and compared with similar estimates from a previous deployment of sensors on the bridge and finite element models.
