IRIS – WP 1: Nuclear Power

In general the results of FEM simulations depend on the quality of the input data. That means not only geometry, boundary conditions and loads have to be described very well.  With highly complex nonlinear simulations like those earthquake investigations with the IRIS shear wall especially the material modelling has a significant importance.  The calculation of the seismic fragility curves of concrete shear walls requires the probability density function of the capacity of the shear wall. In the first step, the probability density function is derived on the basis of the commonly used scaling method, which uses lognormal mathematics. This method is improved by the second moment – first order approach as it is used for reliability analysis of civil structures. Finally the results are checked by a comprehensive stochastic nonlinear fracture analysis of the shear wall. The methods are demonstrated on the basis of the projected experimental campaign on stiff shear walls within the program TESSH.

Wölfel’s project results

Know-how to compute fragility curves of sheer walls out of armored concrete steel due to the load case earthquake.

Publications

  • Block, C.; Engelhardt, J.; Henkel, F.-O.: Active Control of Vibrations in Piping Systems, Vortrag und Paper bei 20th International Conference on Structural Mechanics in Reactor Technology,  SMiRT 20, Espoo, Finland, August 9-14, 2009,  SMiRT 20-Division VI, Paper 1658
  • Klein, D.; Henkel, F.-O.: CALCULATION OF SEISMIC FRAGILITIES OF CONCRETE SHEAR WALLS BY USE OF THE METHODS OF STRUCTURAL RELIABILITY AND SAFETY ANALYSIS, Vortrag und Publikation, Post SMiRT Conference Seminar, 14-15 Nov. 2011, Mumbai, India
  • Klein, D.; Henkel, F.-O.: Improvement of the Seismic Fragility Analysis by Use of the Methods of Structural Reliability and Safety Analysis, Vortrag und Paper auf 20th International Conference on Structural Mechanics in Reactor Technology, SMiRT 20,  Espoo, Finland, August 9-14, 2009, SMiRT 20-Division VII, Paper 1655
  • Siefert, A.; Henkel, F.-O.: NONLINEAR ANALYSIS OF COMMERCIAL AIRCRAFT IMPACT ON A REACTOR BUILDING – COMPARISON BETWEEN INTEGRAL AND DECOUPLED CRASH SIMULATION,  Vortrag und Paper zur SMiRT 21, Transactions, SMiRT 21, 6-11 November, 2011, New Delhi, India  Div-III: Paper ID# 144