Optimized seismic retrofit of steel-concrete composite frames

Papavasileiou, G; Charmpis, DC; Lagaros, ND

dc.contributor.author	Papavasileiou, G	en
dc.contributor.author	Charmpis, DC	en
dc.contributor.author	Lagaros, ND	en
dc.date.accessioned	2014-03-01T02:53:25Z
dc.date.available	2014-03-01T02:53:25Z
dc.date.issued	2011	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36299
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-80054795410&partnerID=40&md5=9b0fc6f86242813ceb4db9455d509c0f	en
dc.subject	Composite	en
dc.subject	Concrete	en
dc.subject	Optimization	en
dc.subject	Retrofit	en
dc.subject	Seismic	en
dc.subject	Steel	en
dc.subject.other	20th century	en
dc.subject.other	Composite	en
dc.subject.other	Construction method	en
dc.subject.other	Design codes	en
dc.subject.other	Design method	en
dc.subject.other	Economic considerations	en
dc.subject.other	Eurocodes	en
dc.subject.other	Existing structure	en
dc.subject.other	High stiffness	en
dc.subject.other	Market competition	en
dc.subject.other	Minimal cost	en
dc.subject.other	Minimum cost	en
dc.subject.other	Multistorey buildings	en
dc.subject.other	Retrofit	en
dc.subject.other	Seismic	en
dc.subject.other	Seismic retrofits	en
dc.subject.other	Steel concrete structure	en
dc.subject.other	Steel-concrete	en
dc.subject.other	Steel-concrete composite	en
dc.subject.other	Structural codes	en
dc.subject.other	Structural systems	en
dc.subject.other	Total costs	en
dc.subject.other	Civil engineering	en
dc.subject.other	Competition	en
dc.subject.other	Computational methods	en
dc.subject.other	Costs	en
dc.subject.other	Earthquakes	en
dc.subject.other	Engineering geology	en
dc.subject.other	Retrofitting	en
dc.subject.other	Seismic design	en
dc.subject.other	Structural dynamics	en
dc.subject.other	Structural optimization	en
dc.title	Optimized seismic retrofit of steel-concrete composite frames	en
heal.type	conferenceItem	en
heal.publicationDate	2011	en
heal.abstract	The present paper investigates the optimum way of reinforcing existing composite steel-concrete structures that violate the criteria suggested in Eurocode 4. The motivation to conduct the specific research is the need for existing structures to conform to new regulations without extensive operations. Composite steel-concrete systems are an attractive construction method, since they have been found to be cost-effective, especially for multi-storey buildings, and also successfully take advantage of the high stiffness of steel without its vulnerability to fire. These structural systems are not new and have been used since the beginning of the 20th century, so there is a number of existing structures which have been designed with previous versions of structural codes and have to conform to the modern regulations. It is obvious that each new set of design codes takes into account new dangers that might occur and updates the design methods already used. On the other hand, the economic considerations which have to be taken into account and the high market competition force the engineers to seek solutions that are at the same time easily and rapidly constructed, but also yield the required performance with the minimum cost. The present work presents two retrofit methods for composite steel-concrete frames, which are evaluated in the context of structural optimization. The frames considered fail to satisfy the provisions of Eurocode 4 and are therefore retrofitted with the two aforementioned methods in a way minimizing the total cost of steel and concrete required for the retrofit. This way, the frames are upgraded with minimal cost.	en
heal.journalName	ECCOMAS Thematic Conference - COMPDYN 2011: 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering: An IACM Special Interest Conference, Programme	en