Reliability based code making for seismic assessment under gas extraction
article
Until recently earthquakes were not taken into account in the Dutch Building Decree and other Dutch building regulations. Although in 1992, an earthquake happened in Roermond with a magnitude of 5.8 on the Richter scale which damaged buildings, this was not seen by the law makers as an argument for the introduction of regulations for earthquake resistant structures and the seismic assessment of existing structures. On August 16, 2012 an induced earthquake occurred in the north of the Netherlands near the village of Huizinge in the municipality of Loppersum. The moment magnitude of the event was
estimated to be M = 3.6, by the KNMI. The strength of that earthquake is the largest event in the region until present, with effects at the surface strongly felt by the population. The induced earthquakes occur at very shallow depth (about 3 km), which makes that accelerations and velocities are much larger than those of tectonic earthquakes with the same magnitude. After this seismic event it became clear that for the Groningen region regulations were necessary for seismic design and assessment. Basis of the assessment is he target individual risk of 10−5 per year as defined by the Meijdam Committee (Meijdam,
2015). Due to the nature of the target safety level and uncertainties in the seismic loading and the resistance of the existing often masonry houses, a reliability based approach is necessary. This will enable decision making under the present large uncertainties. In this light, in this paper, the reliability backgrounds of the Dutch guideline NPR 9998, 2020 are discussed.
estimated to be M = 3.6, by the KNMI. The strength of that earthquake is the largest event in the region until present, with effects at the surface strongly felt by the population. The induced earthquakes occur at very shallow depth (about 3 km), which makes that accelerations and velocities are much larger than those of tectonic earthquakes with the same magnitude. After this seismic event it became clear that for the Groningen region regulations were necessary for seismic design and assessment. Basis of the assessment is he target individual risk of 10−5 per year as defined by the Meijdam Committee (Meijdam,
2015). Due to the nature of the target safety level and uncertainties in the seismic loading and the resistance of the existing often masonry houses, a reliability based approach is necessary. This will enable decision making under the present large uncertainties. In this light, in this paper, the reliability backgrounds of the Dutch guideline NPR 9998, 2020 are discussed.
Topics
TNO Identifier
967060
Source
Heron, 66(1), pp. 1-16.
Pages
1-16