TA project: ENISTAT

Click here to read the final report of the ENISTAT project.

Click here to watch a video from the ENISTAT tests.

A concise presentation of the aim and main outcomes of ENISTAT is available at the SERIES TA joint brochure.

TITLE OF PROPOSAL: Experimental and Numerical Investigation of Shear wall RC buildings under Torsional effects using Advanced Techniques: ENISTAT

HOST TA FACILITY: 
CEA, Saclay, France

TA AGREEMENT BETWEEN USERS AND FACILITY :
November, 24th 2009

STARTING DATE:
September, 30th 2009 (kick off meeting)

END DATE: February 2013


NO. OF USERS (researchers):
8

LEAD USER:
Ahmet Yakut - Middle East Technical University (Turkey)

ADDITIONAL USERS:
Polat Gülkan - Middle East Technical University (Turkey)
Steffen Scheer - SCHOECK Bauteile GmbH (Germany)
Seref Diler - SCHOECK Bauteile GmbH (Germany) 
Frédéric Ragueneau - LMT-Cachan (France)
Arnaud Delaplace - LMT-Cachan (France)
Gabriela M. Atanasiu - Technical University “Gheorghe Asachi” of Iasi (Romania)
Sebastian Crijanovschi - Technical University “Gheorghe Asachi” of Iasi (Romania)



SUMMARY OF PROPOSED RESEARCH:

Reinforced concrete buildings exhibiting 3D and non-linear effects are a main concern in the field of earthquake research and regulation. The comprehension of the structural behaviour of such complex structures under seismic loads, and especially of their degradation modes (such as crack pattern) is necessary and remains still a main challenge especially when important global torsional effects are expected. Three mains objectives are in the scope of the proposal
- Management of test specimen to strong bi-directional (horizontal) earthquake motions, involving torsional effects. Following the SMART project (high level of reinforcement ratio for a non-symmetric nuclear facility building) for which an international blind benchmark allowed 40 international teams to test their numerical capability, this new experiment, based on the SMART geometry will furnish experimental results for low reinforcement ratio and large crack patterns. This will allow researchers to study high level of nonlinear effects as well as relationship between the response and the crack patterns. We expect validation and improvements of numerical models at low and high over design levels.
- Evaluation of experimental results using modern experimental techniques for data acquisition. Digital Image correlation technique and tracking allow for the measurement and identification of crack pattern. The recent developments of constitutive equations need such refined local information to be validated at the structural scale. Classically used for quasi-static applications, these methods need validation for earthquake applications. This method is expected to reveal data on the crack initiation, opening and closure, which are crucial for understanding the structural degradation.
- Implement & monitor a study case considering new structural elements allowing wall-slab junction reducing the thermal energy lost. As per new requirements for sustainable buildings, these R&D products need validation for seismic zones.

What's next

Series logo small   SERIES Concluding Workshop
  Joint with US-NEES "Earthquake Engineering Research Infrastructures

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