Abstract
In the context of the seismic assessment of the building stock in the North East Groningen area different analysis methods can be used. For safety evaluation a near collapse limit state has been defined in the current local guideline. This limit state allows for significant non-linear behaviour. The most advanced method of analysis for the evaluation this limit state is a Non-Linear Time History (NLTH) analysis. In order to achieve the least conservative estimation of the seismic resistance full 3D models of the buildings including a soil block are used. In these analyses aspects like time marching, integration methods, iteration schemes, tolerance criteria, capacity curves (tension, compression, shear) and element properties may all be decisive for finding the correct solutions. The size of the models in combination with the amount of time steps and the need to advance deeply into the non-linear behaviour of the building, require an exceptional computational effort and the analyses are very complex and time consuming. The lessons learned on these subjects in NLTH analysis can be used in future projects. In order to gain greater speed in the assessment of the building stock an advanced Modal Response Spectrum (MRS) analysis method has been developed. This method is much less time consuming, but it can be quite conservative. This conservatism has been diminished significantly using the lessons learned from the NTLH analysis. The advances and lessons learned in NLTH and MRS analyses are demonstrated in this paper.
Published Version
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