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WORK PACKAGE 9: PRACTICAL BRIDGE MANAGEMENT - page 52 / 67

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SAMCO Final Report 2006 F09 Report on Bridge Management

5.2 Criteria to interface monitoring and control with bridge management.

The information in this report and the discussions with the members and partners in SAMCO has shown that:

The criteria to interface the monitoring or control with practical bridge management is to describe how the monitoring data and the structural control is to be used as a part of the bridge management. This should be done in detail prior to the design and installation of any monitoring system or any structural control system and differs from one case to another.

The criteria to interface the structural control with the practical bridge management is achieved by describing how it is used and when it is used to improve the perform- ance of the structure. This can be by reducing the vibration amplitudes (earthquake actions, wind vibrations etc.), by heating the structures surface (prevention of ice on the bridge, removal of ice from cables etc.) or similar actions.

The criteria to ensure interfacing of the monitoring with the practical bridge manage- ment is to describe how the monitoring data are going to be used, e.g. by describing their translation into suitable parameters (e.g. chloride content, corrosion risk, corro- sion rate) and to describe how these parameters are going to influence the manage- ment.

The monitoring can essential be divided into two groups: Ordinary cases, where monitoring is a part of the normal inspection routine and special cases, where the normal inspection routines are insufficient:

Ordinary cases: This is the most common situation in bridge management, as many structures suffer from deterioration, but can be inspected with the normal inspection methods and where there is no urgent risk of collapse.

Special cases: This is the more unusual situation, where the structures are es- sentially impossible or very difficult to inspect, where the design or performance needs to be verified or where the structure has a substantial risk of collapse, which requires a fast response in case the performance changes.

The criteria for interfacing the monitoring with the bridge management will be de- scribed in the next section.

www.samco.org

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