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In seismic design, partial-strength composite steel-concrete moment resisting (MR) frame structures represent an open research field, both from a theoretical and an experimental standpoint. This report presents a series of vibration experiments, carried out with the scope of identifying changes in the dynamic response of a MR frame structure, following to the application of pseudo dynamic (PsD) loadings. The specimen was constructed and tested at the European Laboratory for Structural Assessment (ELSA) of the Joint Research Centre (JRC) in Ispra, and consists of a full-scale two-storey two-bay frame with 12.8 m by 7.4 m bimensions in plan and 7.0 m in height. Resistance to lateral seismic loads is provided by three parallel MR framesin the main direction of loading and by a bracing system in the orthogonal direction. The frames are made of composite beams and partially encased composite columns, connected by an innovative partial strength joint, designed according to the provisions of Eurocode 8 (EC*). The testing programme includes a sequence of PsD tests, simulating earthquakes with peak ground acceleration (pga) scaled up to the collapse limit state and the final cyclic test. During each testing phase, the structure was instrumented in three different configurations: the first one aimed at capturing the overall response of the building, whike the other two focussed on the characteristics of an interior and an exterior beam-to column joint. Each characterization phase included shock tests, performed with an instrumented sledge hammer, and stepped-sine tests executed by means of an electromagnetic shaker.

The report provides a short description of the test structure, the the experimental programme, the forcing actions and the sensor acceleration measurements. All recorded data are annexed to the report.

Additional information

Authors: BURSI O S, University of Trento, Trento (IT);MOLINA J, Joint Research Centre , ELSA, Ispra (IT);SALVATORE W, University of Pisa, Pisa (IT);TAUCER F, University of Pisa, Pisa (IT)
Bibliographic Reference: EUR 21206 EN (2004), various paging. Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9893 Fax: +39 033278 5409 E-mail: or Bruxelles (BE) Tel: +32 2 295 76 24 Fax: +32 2 299 63 22
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