TA project: CoMa-WallS

Click here to watch a video. 

Click here to read the final report of the CoMa-Walls Project.

A concise presentation of the project's aim and main outcomes is available in the Joint brochure of the TA facilities.

TITLE OF PROPOSAL: Seismic Behaviour of Mixed Reinforced Concrete - Unreinforced Masonry Wall Structures

HOST TA FACILITY: 
EUCENTRE, Pavia, Italy

TA AGREEMENT BETWEEN USERS AND FACILITY:
August 2012

STARTING DATE:
September 2012

END DATE:
January 2013

NO. OF USERS (researchers):
9

LEAD USER:
Katrin Beyer - EPFL: Ecole Polytechnique Fédérale de Lausanne (Switzerland)

ADDITIONAL USERS:
Baris Binici - METU: Middle East Technical University (Turkey)
Christoph Butenweg - Rheinisch-Westfälische Technische Hochschule Aachen (Germany)
Murat Altug Erberik - METU: Middle East Technical University (Turkey)
Pierino Lestuzzi - EPFL: Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Marco Tondelli - EPFL: Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Sarah Petry - EPFL: Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Alessandro Paparo - EPFL: Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Jenö Varga - Keller AG Ziegeleien (Switzerland)
Thomas Wenk - Wenk Erdbebeningenieurwesen und Baudynamik GmbH (Switzerland)

Structure on the shaking table before testing.


SUMMARY OF PROPOSED RESEARCH:
 

The objective of the proposed research project is to investigate the seismic behaviour of mixed reinforced concrete (RC) and unreinforced masonry (URM) wall structures by means of shaking table tests. Although such structures are very common in practice, they have not been tested in the past. In mixed RC and URM wall structures the system stiffness and overall structural behaviour will strongly depend on both types of structural elements because the stiffnesses of the walls are comparable. 
The proposed test unit is a four storey building built at half scale. The test unit will be subjected to unidirectional excitation at different levels. The structure represents a modern, engineered residential building with RC slabs. It has two RC and six URM walls; four of the latter will be loaded in-plane and two out-of-plane.

The test results will allow addressing open issues in European standardization concerning the seismic design of mixed structural systems, where two different types of structural systems act in parallel. Among the open issues are, for example, the choice of force-reduction factors q for mixed structural systems, assumptions concerning the distribution of base shear forces between different types of structural elements, importance and quantification of compatibility forces due to different deformation characteristics of structural elements. In addition, performance limit states of such structures are not defined. For mixed RC-URM wall structures quantitative conclusions concerning these issues will be possible.

 

Structure after the last shaking table test.

 

What's next

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

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