TA project: CERBSAC

Click here to watch a video from the CERBSAC tests.

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

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

TITLE OF PROPOSAL: High-performance composite-reinforced earthquake resistant buildings with self-aligning capabilities

HOST TA FACILITY: EQUALS, Bristol, UK

TA AGREEMENT BETWEEN USERS AND FACILITY: August 2009

STARTING DATE:
March 2010

END DATE:
October 2011

NO. OF USERS (researchers):
6

LEAD USER:
Bohumil Kasal - TU Branschweig/Fraunhofer WKI (Germany) and ITAM Prague (Czech Republic)

ADDITIONAL USERS:
Andreas Heiduschke -TU Dresden (Germany)
Stanislav Pospisil - ITAM Prague (Czech Republic)
Shotta Urushadze - ITAM Prague (Czech Republic)
Zbigniew Zembaty - University of Techology Opole (Poland)
Norbert Rüther - Fraunhofer WKI (Germany)

 


SUMMARY OF PROPOSED RESEARCH:


This proposal is based on previous successful studies performed by the members of this team where scaled and full-scale prototypes of self-aligning frames were used (Heiduschke et al. 2008, Heiduschke et al. 2009). In the previous studies, it was shown that laminated wood frames with local composite reinforcement resist significant inertia forces. However, large drifts were impossible to control through moment connections. This has been viewed as a drawback from the standpoint of serviceability design. This proposal addresses the issue of excessive drift by including additional stiffening devices that will control drift at moderate earthquakes and allow energy dissipation during events of large magnitude. Such controlling devices will include x- and knee-bracing with controlled yielding, dissipative links, and/or shear walls. The idea is to allow the replaceable stiffening device to be damaged while leaving the main load bearing system (frame) intact. The challenge here is designing the frame as self-aligning, meaning that sufficient elastic energy be stored in the beams and columns and recovered after the EQ event. The loss of stiffness in the yielding bracing will reduce the recovery energy demand.
The overall objective of the proposed research is to increase the reliability and safety of buildings in natural disaster-prone areas using renewable natural resources, sustainable development principles, and the latest knowledge of composite materials through the development of hybrid and composite structures with high load-capacities, low mass, and high ductility. Additional benefits include an application of composite frames to historic masonry and adobe structures in seismic-prone areas to achieve their seismic protection while keeping original architectural and structural attributes intact. 

What's next

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

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