Concrete high-tensio
n cabinet loaded by an explosive blast
Technum
Leiepark 18
9051 Gent
Belgium
Tel.: +32 92400911
Fax: +32 92400900
Contact:
M.
Dieter Rabaut
Email:
Website:
The new design guidelines for HT-cabinets
in Belgium require the HT-cabinets to be
resistant to an overpressure caused by a
shortcut. The energy released by a shortcut
is transferred into the thermal expansion of
the gasses in the neighbourhood of the
shortcut. The basement of the cabinet acts
as expansion space. The resulting overpres-
sure on the different elements of the cabi-
net is defined in the guidelines as an
impulse. The impulse is an equal legged tri-
angle with a maximal overpressure of 250
millibar and a duration time of 40 millisec-
onds.
The design is based on the Biggs-methodol-
ogy: the loading is the maximum overpres-
sure multiplied with a dynamic load factor
(DLF). The DLF is function of the form of the
impulse
wave (equal legged triangle) and
the ratio of the first period of the loaded ele-
ment (T) to the duration of the impulse
(td=40
ms). The values for the
DLF are
found in US Army Corps of Engineers Man-
ual EM 1110-345-415.
The loading is placed on the different ele-
ments as a static loading. The first periods
are determined by a dynamic analysis.
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Company
Project
Concrete high-tension cabinet
loaded by an explosive blast
Technum N.V. is a dynamic, internationally
oriented and strongly growing multidiscipli-
nary office for engineering and consultancy
with establishments in the various Flemish
provinces.
Technum provides services for the authori-
ties, industrial and service-providing compa-
nies, project developers, international insti-
tutions, etc. for each project, single or multi-
disciplinary, and for each project phase.
Technum has the capacity, expertise and
creativity required to guarantee clients spe-
cialised and complete guidance in numer-
ous fields.
Technum consists of three Business Units
established in Antwerp,
Ghent and Hasselt,
with two other establishments in Leuven
and Ostend. These business units with their
different departments are geographically
spread around Flanders. Each of them has a
reputation for expertise, passion and flexibil-
ity.
This geographical distribution and the indi-
viduality of each business unit allows the
maximum use of professional knowledge
and skills, experience and creativity for each
project in line with the wishes of the client.
This
means an additional organisational
advantage in view of the proximity to specif-
ic markets and specific knowledge sources.
SCIA User Contest 2005 / Civil Engineering
2
Categorie
