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Concrete-filled steel hollow section columns for building construction - innovation and design (CFSHSC)

Abstract

Concrete-filled steel tubular columns with solid steel core and double-steel tube columns provide competitive solutions for multi-storey buildings with high demands on bearing capacity, cross-sectional dimensions and fire safety.

Slender design solutions under high loads are possible, which are architecturally appealing but also increase the floor space compared to both conventional reinforced concrete columns and other types of composite columns assuming similar bearing capacities.

Conceptually, their exceptional structural fire behaviour is attributed to a gradual load redistribution process to the inner part of the section during fire that is thermally protected by the concrete infill. Thus, high fire resistances can be achieved without additional fire protection material. Additionally, the steel tube can reliably prevent the concrete from spalling.

The experimental database of these types of composite columns is extremely scarce for both, ultimate load tests at ambient temperature and fire tests. Knowledge gaps related to the fire behaviour and uncertainties with regard to the applicability of already available design methods in particular concerning the use of high-strength materials lead to difficulties in design and application for engineers, experts and authorities.

The research project intends to establish an experimental database and to develop analytical models for the design of these composite columns at ambient temperature and in case of fire based on fundamental research and test results. In addition to ultimate load tests numerical simulations as well as parametric studies will be performed. The project makes a major contribution to the safe and economic design of innovative concrete-filled steel tube columns, encourages their application and promotes the further development of these products.

In addition to ultimate load tests numerical simulations as well as parametric studies will be performed. The project makes a major contribution to the safe and economic design of innovative concrete-filled steel tube columns, encourages their application and promotes the further development of these products.


Impressions

Contact person

Przemyslaw Schurgacz

Project partner

Industry partners
  • Vallourec 
  • stahl + verbundbau GmbH
  • Tuchschmid AG
  • Brandschutz Planung Klingsch
  • TATA STEEL
  • mensinger stadler
  • Gruner GmbH
  • HRA
  • Peikko GmbH
  • Urech Bärtschi Maurer Consulting
  • Salzgitter Mannesmann Forschung
  • IGB Ingenieurgruppe Bauen PartG mbB
Funding

AiF / BMWi

Project duration

01.09.2017 to 28.02.2021