Prufung der Stutzenbelastung an Kugelbehaltern durch faseroptische Verformungsmessungen

摘要

Stability of spherical tanks stored on retaining piles is to be proven according to German set of rules(AD-set of rules/stability proof for pressure tanks)in recurring checks.A crucial criterion therebv exists in the determination of the real load at the piles,in order to avoid a failure of the tank through breaking or tilting.The determination of the stability of the piles so far usually took place by ultrasonic wall thickness measurements or deformation measurements with resistance strain gauges during the pressure test.In the company Ruhr Oel GmbH Gelsenkirchen a measurement with fiber-optic deformation sensors took place during the pressure tests of three spherical tanks.With help of the measurement results the real tilting stress at the piles is determined and compared with the results of the static.This is the basic for the assessment of the pile stability,bearing and foundation.The sensors can be applied within highly explosive areas without additionally protection.They have a small installation expenditure.The measuring accuracy is very high(measuring length approx.2.0 m).The sensors are insensitive in relation to humidity,oscillations,corrosion and electromagnetie field.The measurement takes place temperature-compensated.