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WORK PACKAGE 9: PRACTICAL BRIDGE MANAGEMENT - page 45 / 67

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SAMCO Final Report 2006 F09 Report on Bridge Management

5.1 Questionnaire on end-users requirements for monitoring

A questionnaire (in Annex A) dealing with end-user requirements to monitoring, which were to be used in practical bridge management was sent out in October 2002. The questionnaire dealt mainly with the monitoring and its intended use in manage- ment:

  • 1.

    Requirements for the sensors (accuracy, calibration, installation).

  • 2.

    Experiences with using monitoring.

  • 3.

    What would your requirements be for a monitoring system ?.

  • 4.

    What do you spend most of you maintenance costs on and what kind of moni-

toring would be required to reduce these costs ?.

A number of replies to the questionnaire were received during the period of Novem- ber 2002 to January 2003. These answers came from institutions, directorates, com- panies and consultants, who manage over 45.000 European road and railway bridges in total, distributed as shown in Table 23.

Bridges (not culverts) Reinforced concrete bridges Pre-stressed (1) Post-tension (1) Un-reinforced concrete bridges Composite bridges Steel bridges Timber bridges Stone bridges

Numbers 33987 17281 225 940 1271 3887 792 1376

Percentage 78% 40% 1% 2% 3% 9% 2% 3%

Other bridge types Table 23. Types of bridges. (1): Included in

1154 the reinforced

3% concrete bridges above.

Bridges (not culverts) Large (more than 5 span or total length over 500 m) Medium Small (1-2 span and total length less than 40 m)

Numbers

Percentage

1635

4%

7844

17%

36532

79%

Table 24. Size of bridges.

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