Diaphragm Effect for Industrial Steel Buildings under Earthquake Loading
| Autor: | R. Landolfo, G. De Matteis, Federico M. Mazzolani |
|---|---|
| Přispěvatelé: | DE MATTEIS, G, Landolfo, R, Mazzolani, FEDERICO MASSIMO, DE MATTEIS, G., Landolfo, R., Mazzolani, F. M., DE MATTEIS, Gianfranco, Landolfo, Raffaele |
| Rok vydání: | 1998 |
| Předmět: |
Engineering
business.industry Metals and Alloys Building and Construction Structural engineering Buildings Diaphragms Earthquake effects Sandwich structures Stress analysis Structural analysis Structural panel Diaphragm (structural system) Steel structures Mechanics of Materials Bracing systems Stressed skin design Composite material business Sandwich-structured composite Civil and Structural Engineering |
| Zdroj: | Scopus-Elsevier |
| Popis: | Diaphragm action provided by cladding panels is more and more investigated by several researchers dealing with different structural typologies. Such an aspect is particularly felt in the field of steel structures, where it is a common design procedure to use either moment resisting frames or a localized bracing system to resist lateral loads due to wind or earthquake. Nevertheless, the behaviour of steel frames under horizontal loads can be substantially affected by cladding panels. These elements influence the response of the main structure under both service and ultimate conditions (Mazzolani et al 1997a and b). With reference to lightweight sandwich panels, a model able to interpret the cyclic behaviour of a single shear diaphragm connected to the external frame by means of mechanical fasteners has been set up in Mazzolani et al. (1996a). It has been developed on the basis of experimental results obtained within a general research project sponsored by ECSC (Mazzolani et al. 1996b). In this paper, with regard to a single-storey steel industrial building, the effect of cladding panels acting as diaphragms on the global seismic response of pin-jointed structures is analysed. The examined structure has been designed according to the EC3 and the EC8 provisions, taking into account both wind and seismic actions. The comparison between the traditional design solution using cross-bracing steel members and the one adopting cladding panels as the bracing system has also been performed. The aim is to check the reliability of the stress skin design methodology in predicting the actual behaviour of the buildings under horizontal actions. The seismic response of the building has been investigated with reference to several historical earthquakes by means of a 3-D non-linear dynamic analysis, where each panel is idealised by means of equivalent diagonal members. In order to take account of the influence of the frequency content of the ground acceleration on the structural response (De Matteis et al. 1997), ten different seismic inputs have been selected aiming to prvide, average elastic response spectra comparable with the ones suggested by EC-8 for subsoil classes A and B. In order to investigate the actual ultimate resistant capacity of the structure, the analysis has been performed with reference to different peak ground accelerations. The hysteretic behaviour of the panel has been accounted for by means of the previously mentioned mathematical model properly studied for screwed sandwich panels. The collapse criterion has been established with reference to different conventional ductility limits, as experimentally stated. The worked example carried out for a one-storey steel industrial building has allowed output of interesting information on the use of cladding panels as structural shear diaphragms. In particular, the numerical analysis has shown that, for seismic applications, a behaviour factor q = 2 can be assumed for both subsoil classes A and B. Within this limit, a design procedure referred to the panel elastic strength leads to shear distortion always less than that corresponding to the collapse of the system. © 1998 Elsevier Science Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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