Bridges: Bolshoi Moskvoretskiy Bridge

Case study: SOFO, ADAM System

Continuous remote monitoring
Historical concrete bridge monitoring
Use of SOFO softwares for sophisticated monitoring

Project Description

Summary: Bolshoi Moskvoretskiy Bridge was built in 1936-37, over the Moscow River. It is situated in the centre of Moscow, next to the Kremlin, and leads the one of the main traffic lines of city to the Red Square.

Clients: Triada Holding

Place: Moscow (Russia)

Period: 2003 - N/A

Installation: Triada Holding

Structure's short description: The bridge consists of three parallel 100m long reinforced concrete arch hidden behind stonewalls. The cross-section of each arch contains three merged boxes. The superstructure of the bridge is supported by columns. Four traffic lanes crosses the bridge in each direction. Two types of the degradation are noticed on the bridge. Settlement in the centre of the arch which provoked the cracking of the stone walls near abutments on both sides of the bridge, and chloride diffusion that practically transverses the upper wall of the arch boxes in some sections, and penetrates inside the boxes. The condition of the bridge after nearly 70 years of service and its functional and historical importance have led the authorities to decide to continuously monitor structural behaviour of the bridge.

Aim of monitoring: The aim of monitoring is increase the knowledge concerning the structural behaviour of this very old structure, to increase safety and reduce maintenance costs. Total of 16 standard SOFO sensors are installed in order to continuously monitor average strain along the arch, curvature in both, horizontal and vertical direction and the deformed shape using the SPADS software. In order to distinguish thermal influenced 6 thermocouples are also installed. In a later stage the prewarning and warning system will be set using the SOFO VIEW software. The data is sent remotely to the control room using a telephone line.

Number of sensor: 16

Main Results: The installation of all the SOFO equipment was completed in June 2003. The long-term monitoring started.

Cracking of the stone walls confirms the settlement in the middle of the arch; pentration of clorides is visible in interior of the arch boxes

Techincal drawing of the bridge and position of sensors

SOFO sensor before and after the protection is installed, and a view to the intermediate connection box

Bibliography:

European Perspective on Monitoring-Based Maintenance , A. Del Grosso, D. Inaudi, IABMAS '04, International Association for Bridge Maintenance and Safety, October 19-22, Kyoto, Japan, 2004

Growing Market Acceptance for Fiber-Optic Solutions in Civil Structures , T. Graver, D. Inaudi, J. Doornink, Optics East Philadelphia, USA, October 27, 2004

Growing Market Acceptance for Fiber-Optic Solutions in Civil Structures , Th. Graver, D. Inaudi, Optics East Conference,Boston, USA, October 23-26, 2005

Health monitoring with optical fiber sensors: from human body to civil structures , ?ic Pinet, Caroline Hamel, Branko Gli?ic, Daniele Inaudi, Nicolae Miron, 14th SPIE Annual Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, San Diego (CA), USA, 6532-19, 2007

Monitoring of Heritage Structures and Historical Monuments Using Long-Gage Fiber Optic Interferometric Sensors - An Overview , Branko Glisic, Daniele Inaudi, Daniele Posenato, Angelo Figini, Nicoletta Casanova, The 3rd International Conference on Structural Health Monitoring of Intelligent Infrastructure - SHMII-3, November 13-16, on conference CD, 2007

Fibre Optic Methods for Structural Health Monitoring , Branko Glisic and Daniele Inaudi, Johh Wiley & Sons, Ltd, 2007