TAILIEUCHUNG - Lifetime-Oriented Structural Design Concepts- P19

Lifetime-Oriented Structural Design Concepts- P19: At the beginning of 1996, the Cooperative Research Center SFB 398 financially supported by the German Science Foundation (DFG) was started at Ruhr-University Bochum (RUB). A scientists group representing the fields of structural engineering, structural mechanics, soil mechanics, material science, and numerical mathematics introduced a research program on “lifetimeoriented design concepts on the basis of damage and deterioration aspects”. | 498 4 Methodological Implementation u mm Fig. . Numerical investigation of crack propagation of an anchor pull-out test Load-displacement curve displacement reaches uz mm the carck propagation nearly stops due to the fact that most of the load is carried by the area of counter pressure. This is evident from Figure right that shows the strongly increased value of the stress component a33 at the counter pressure support. On the contrary in the beginning of the cracking process figure left there is nearly no compression at the area of counter pressure because of the load carrying of the concrete in the vicinity of the anchor plate. When the displacement reaches uz mm the load is primarily induced to the counter pressure supports by the nearly fully separated upper part of the concrete structure. This bearing behaviour of the system is primarly characterized by the position of the crack surface that is running underneath the pressure supports. In the case that the crack reaches the upper surface of the concrete structure being in front of the supports there is going to be a structural softening of the concrete block. This interpretation is similiary to the one in 301 where a similiar numerical test is performed. As can be further deduced from Figure there is a high compression atop of the anchor plate which would also lead to compression failure of concrete. This does not occur here because this analysis only takes failure of concrete in tension into account. Substructuring and Model Reduction of Partially Damaged Structures Authored by Christian Rickelt and Stefanie Reese The objective of this section is to present an efficient strategy to cope with demanding dynamical simulations of complex structures. We are in particular interested in long term calculations like life cycle investigations. Our Numerical Methods 499 ansatz emanates from the idea that a structure only comprises locally distributed damaged zones. The proposed .

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