NUMERICAL SIMULATION OF THE SUSPENDED ROOF OF THE NIARCHOS CULTURAL CENTER AT ATHENS – GREECE UTILISING COMPONENT TEST RESULTS

Abstract eng:
The suspended roof of the Stavros Niarchos Cultural Center (SNCC) at AthensGreece is studied. This roof with dimensions approximately 100m x 100m is suspended by 30 suspension units composed of springs and dampers. Each suspension unit is formed by four spring, two dampers as sliding rigid core all linked with a 3-D rigid steel frame. Each suspension unit is supported on the top of a slender hollow steel column approximately 20m height, which in its turn is supported on the top rigid reinforced concrete slab of the SNCC base-isolated main building. All these columns bear the loads of the suspended roof that is a hollow reinforced concrete deck with internal webs. The characteristics of the large SNCC suspended roof are briefly presented and discussed together with the functioning of the suspension units of this roof. The effectiveness of the base isolation system for the main building of the SNCC is examined by simplified numerical models. A brief description is next presented of the experimental sequence whereby all the components of a prototype suspension unit (springs and dampers) as well as the suspension unit itself were subjected to extreme loading conditions, as required by the design loads. The measured response of the individual components of the tested suspension units formed the basis to apply numerical simulations aimed to numerically predict the observed behaviour. First, the measured performance of the individual springs and dampers forming each suspension unit is numerically simulated. Next, the measured performance of one suspension unit is also numerically simulated. Good agreement was obtained by this numerical simulation effort between measured and predicted behaviour for the tested suspension unit.

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