122
Category 3: Industrial Buildings and Plants
3
Industrial Steel Foundry Hall - Toutrakan, Bulgaria
SE
Contact
Vihrena Gardeva
Address Tsurkovna nezavisimost str. 16, fl.13
7000 Ruse, Bulgaria
Email
Constructa Ltd is a structural design agency, established in Bulgaria in 2001.
We value our experience in chemical industry, having learned about various
processes and technologies and developed an untraditional approach
towards structural decisions. We start every project with the desire to make
it extraordinary and unique by
interweaving methods, technologies
and
materials
. With the help of SCIA we are able to model specific actions such
as surcharge drift snow loads, thermal loads, explosions and water pressure
on river banks, etc. Our general policy is to study a structure’s work and then
model its behaviour as closely to reality as possible.
Owner
MLPS Ltd
Architect
arch. Jivka Buchukovska
General Contractor
Constructa Ltd
Engineering Office
Constructa Ltd
Construction Period 09/2014 - 03/2015
The structure is located in Bulgaria and provides a large area for melting and
moulding steel furnaces. The dimensions of the structure are 85.5 x
33-39 m, with an area of 3,100 m
2
, and height of 7.88 m, with two additional
canopies. The hall is trapezoidal in plan because of an existing road and
a concrete retaining wall. The main steel frames have a span of 32 m with
columns paired 2UPE240 x 1,100 mm and beams 2UPE240 x 850 mm.
The medium structure which comprises the staff area, is composed of
steel columns and beams, a composite slab, and roofing and walls made
of PVC panels. Two 3D models were created in SCIA Engineer for general
and seismic actions. We have imported the BG seismic spectrums, and
in this case Vrancha, spectrum type 3. It was impossible to have a 90%
effective modal mass in eigenmodes, because the substructure with its
significant mass moves with the soil and was therefore eliminated from
calculations. The seismic deformations were exclusively observed in the
relatively thin shells (roof and facade panels modeled as 6mm thick steel
sheets): trembling and forming “waves”, torsional effects also. Despite
SCIA Engineer’s representation of 3D seismic behaviour, low wide structures
require a specific theoretical and experimental investigation. Paired cross
sections, which were quite common in the recent past, are now a challenge
for all programs based on Eurocode, and are not covered at all. The design
was performed using former BG code.
Constructa Ltd
