Steel Vertical Addition to Existing Building: Case Study and Multicriteria Analysis

This thesis focuses on interventions in existing buildings, specifically examining the use of steel structural systems for vertical extensions. It highlights the key characteristics and particularities of steel as a construction material in such applications. A case study is presented involving the vertical addition of a steel structure to an existing reinforced concrete building, using numerical computational methods to assess structural performance.

Author	Ioanna Skouloumpri
University	Aristotle University of Thessaloniki, Greece

A key part of the study is the analysis and evaluation of the existing building's load-bearing capacity according to the Greek Code for Interventions, in order to determine the necessity for any reinforcements prior to the addition. Furthermore, an original aspect of this work is the implementation of a multi-criteria decision analysis tool (PROMETHEE method), used to compare alternative construction scenarios based on technical, economic, and scheduling criteria. This combined assessment enables the formulation of well-supported conclusions regarding the optimal vertical extension solution, taking into account seismic risk, construction cost, duration, and the overall performance of the structural system.

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Structural Engineering Software for Steel Structures

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