Seismic design of anchors

59 Pages·2014·1.98 MB·English

Ensuring seismic safety through
properly specified anchorages
Jorge Gramaxo
Business Unit Anchors
Hilti Corporation

Chile
21 November, 2014
www.hilti.com/seismic Ensuring seismic safety through properly specified anchorages | J. Gramaxo | Nov2014 1
Agenda
• The relevance of seismic
• BNCS seismic research project
• Seismic qualification of anchors
• Seismic design of anchors
• Anchoring solutions to ensure seismic safety
• Conclusions
www.hilti.com/seismic Ensuring seismic safety through properly specified anchorages | J. Gramaxo | Nov2014 2
Earthquakes are unavoidable natural events
with devastating consequences
www.hilti.com/seismic Ensuring seismic safety through properly specified anchorages | J. Gramaxo | Nov2014 3
Chile seismicity is a very real safety threat to
investments, buildings and its inhabitants
www.hilti.com/seismic Ensuring seismic safety through properly specified anchorages | J. Gramaxo | Nov2014 4
Only seismically designed structures as well as
all construction elements can ensure safety
• Structural anchoring connections are vital to ensure that the structure
responds to a seismic event in a proper, predictable manner.

• Non-structural elements are often either poorly detailed or decisions
are left to the jobsite which pose major threat to the inhabitants.
www.hilti.com/seismic Ensuring seismic safety through properly specified anchorages | J. Gramaxo | Nov2014 5
Building owners are focused on protecting their
property and ensuring production after an event
• In manufacturing and commercial
buildings, the seismic risk is linked to:
- damage of assets
- production downtime
- people safety
- legal consequences

• Non-structural elements failure have
high financial consequences (storage
of goods, equipment, ...)
www.hilti.com/seismic Ensuring seismic safety through properly specified anchorages | J. Gramaxo | Nov2014 6
Anchors are often used in a large number of
applications therefore shall be detailed wisely
M&E installations Racking Structural steel
Façades Utilities Structural PI rebar
www.hilti.com/seismic Ensuring seismic safety through properly specified anchorages | J. Gramaxo | Nov2014 7
Agenda
• The relevance of seismic
• BNCS seismic research project
• Seismic qualification of anchors
• Seismic design of anchors
• Anchoring solutions to ensure seismic safety
• Conclusions
www.hilti.com/seismic Ensuring seismic safety through properly specified anchorages | J. Gramaxo | Nov2014 8
Seismic research and code writing in the field
of fasteners has been focused for various years
2004 2006 2007
Start ETAG Annex E 7 stories UCSD Hilti Seismic project
Pioneering the 1st real scale Guideline work
EU seismic project to study with EOTA, CEN
regulation for anchoring
anchors connections
2009 2012 2013
False ceiling study in JP BNCS project 1st ETA C2 anchors
Strengthen Evaluation of main State of the art
C2
partnerships non-structural qualification of
within Japan applications post-installed
code team anchors
www.hilti.com/seismic Ensuring seismic safety through properly specified anchorages | J. Gramaxo | Nov2014 9
BNCS large scale test aims to better know the
seismic response of non-structural components
BI
FB
BI = base-isolated ; FB = fixed-base
www.hilti.com/seismic Ensuring seismic safety through properly specified anchorages | J. Gramaxo | Nov2014 10