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2020-03-16

Shake table tests of a special risk industrial facility at EUCENTRE Laboratory

Shake table tests of a special risk industrial facility at EUCENTRE Laboratory

After about eight months of design, analysis and implementation, the SERA SPIF (Seismic Performance of multi-component systems in special risk Industrial Facilities) shake table experimental campaign is entering its main testing phases. The objective of the project is to holistically investigate the seismic behaviour of industrial plants equipped with complex process technology by means of shaking table tests. 

The necessity exists, since past earthquakes have demonstrated different critical interactions affecting such plants, namely interactions between the supporting structure and plant components as well as between individual plant components. The structural or process-related interactions not only lead to production losses, but can also lead to serious secondary damages and pose a danger to humans and the environment in case hazardous substances are released due to leakages.

The structure is a three-storey steel moment frame with vertical and horizontal vessels, arranged on the three levels with some of them connected to each other by steel pipes. Furthermore, an electrical cabinet and a typical conveyor system are installed. The three levels are constructed with flexible diaphragm made of steel beams. The test structure is equipped with sensor systems integrated into the structure for rapid damage assessment and is applicable to condition analyses or early warning systems.

The achieved results on the seismic behaviour of multi-component systems with mutual interactions can be used for probabilistic safety analyses in power plants (e.g. nuclear power plants) as well as in industrial plants (e.g. chemical plants). In addition, important findings can be derived for the definition of performance limits, the isolation of structural systems and components as well as for the use of sensor systems for rapid damage assessment.

Visit SERA Transnational Access Web Portal for updates.

2019-12-04

SERA at the SEISMIX 2020 Symposium

SERA at the SEISMIX 2020 Symposium

The International Symposium on Deep Seismic Profiling of the Continents and their Margins (SEISMIX) is a biennial scientific meeting. Its next edition will take place in March 2020 in Perth, Australia. This symposium is the largest in its field and is focusing on control source and natural source imaging of the subsurface, from an exploration to a continental scale. It also addresses the latest technological and scientific developments in the application of seismic methods.

Researchers from the Institute of Earth Sciences Jaume Almera (ICTJA-CSIC) in Barcelona are presenting the latest and ongoing work related to SERA at the SEISMIX Symposium. The main aim is to disseminate the effort among the community and to stimulate discussions related to seismic data sharing and receiving input on new or desired services related to FAIR (findable, accessible, interoperable, and reusable) DSS (deep seismic sounding) data. Special focus will be devoted to the necessity of desired data products and services related to DSS, which could contribute to EPOS. In addition, the seismic database of ICTJA, in coordination with DIGITAL.CSIC (the digital repository of CSIC), will be presented as a prototype example of data management following the FAIR data principles. 

The SEISMIX Symposium will be an outstanding opportunity to make the work carried out within the framework of SERA and EPOS more visible, to discuss cutting edge developments in seismic data management outside Europe, and to reinforce and promote new network collaborations.

2019-12-11

SlabSTRESS TA project at JRC ELSA Reaction Wall

SlabSTRESS TA project at JRC ELSA Reaction Wall

The SlabSTRESS Transnational Access project was successfully completed at the ELSA Reaction Wall. The team was comprised of 14 researchers from Politecnico di Milano (Italy), École polytechnique fédérale de Lausanne (Switzerland), Universitatea Tehnica de Constructii Bucuresti (Romania) and Universidade NOVA de Lisboa (Portugal).

The test specimen was a full-scale two-storey reinforced concrete flat-slab structure with plan dimensions 9x14 m. The testing programme included pseudodynamic tests (hybrid simulation of the physical specimen and numerical shear walls) with input corresponding to the Serviceability and Ultimate Limit States and quasi-static tests under imposed cyclic displacement with increasing amplitude (three slab-column joints were strengthened after the first cyclic test).

The project provided new knowledge on the response of flat-slab structures that could not be captured in previous tests on column-slab sub-assemblies. The results will help calibrate models, verify the Eurocode and Model Code models for punching shear, develop new rules for the deformation-based design and detailing of flat-slab structures subjected to earthquake and gravity loads, and improve the design of flat-slab frames as primary seismic structures.

19 research groups from 13 countries participate in the ongoing blind prediction competition.

Visit www.slabstress.org and follow them on ResearchGate for updates.

2019-11-28

Blind prediction test of a shaking table at LNEC

Blind prediction test of a shaking table at LNEC

The SERA Transnational Access activities in Portugal, LNEC, are inviting scientists to participate in their blind prediction test of a shake table on two adjacent interacting masonry buildings. The buildings have been designed to provide more information on the seismic behaviour of historical building aggregates and will be subjected to a sequence of uni- and bi-directional tests. The test will be conducted at the shake table facility of LNEC and consists in a sequence of uni-directional and bi-directional tests.

The test is scheduled for January 2020. The deadline for submission of the blind prediction is December 20th 2019. Results obtained with any analysis method are welcome. A short description of the model and analysis technique is requested.

A webpage with all information on the test has been setup: http://sera-aims.com/ . All further information as well as questions already posed by participants can be checked there.

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