Author(s)

A. Ivan, M. Ivan & I. Both

Abstract

In this paper we analyze a structure’s response to new loadings in conformity with the new codes. In order to be able to come to a relevant conclusion we analysed three cases: a) strengthening the elements so that it keeps the same configuration, b) strengthening the elements and modifying the moment resisting frames into braced frames and c) reconstruct the entire structure with new elements. By applying the new codes we have analysed the results and we present the conclusions and the best and optimum solution for this particular case. Keywords: retrofit, comparison to old codes, structure response, moment resisting frames, braced frames, sustainability. 1 Introduction The Rovinari energetic complex in Romania is one of the biggest producers of electric (1320 MW) and thermal energy using coal as primary source of fuel. That is why in order to comply with the requirements of the Plan for the implementation of the EU Directive 1999/31 on storage of residual waste, it is imperative to introduce certain installations for the evacuation of coarse slag and ash, by using the technology of the self-hardening fluid. There are four energetic blocks each of 330 MW. For each block the ash and the slag are collected in a silo of 500 m3. This silo leans against a metallic structure, which is to be analysed in this paper. On this structure, supplementary installations for the evacuation of coarse slag and ash have to be mounted. Because of the short time at our disposal and because the silos cannot be dismounted, it is imperative to find a solution to retrofit the existent metal structure without interrupting the production process. The existent metal structure was designed in 1972 and that is

Keywords

retrofit, comparison to old codes, structure response, moment resisting frames, braced frames, sustainability