INTERNATIONAL JOURNAL OF ARTIFICIAL INTELLIGENCE
ISSN: 2692-5206, Impact Factor: 12,23
American Academic publishers, volume 05, issue 06,2025
Journal:
https://www.academicpublishers.org/journals/index.php/ijai
page 1683
EXPERIMENTAL METHODS FOR STUDYING THE INSTALLATION CONDITION
OF LARGE-SPAN UNIQUE BUILDINGS
Nurov Sino Safarboevich
master degree Samarkand State University of Architecture and Construction
named after Mirzo Ulugbek
Abstract:
The results of experimental-theoretical studies of precast monolithic reinforced
concrete shells of complex geometry assembled from enlarged elements are given. The studies
were carried out on full-scale composite shells 48x48 m and diameter 96m, its enlarged
elements 3x18m and 3x24m as well as on the shell model on a scale of 1:10 and 1: 4. The
stress-strain state of shells of a similar type was studied with different mounting and splitting
designs. Recommendations are given on rational methods for the construction of shells from
enlarged elements for public buildings.
Keywords:
stress-strain, deformed state, shell mounting state.
The use of large-span unique buildings is associated with the tasks of improving the methods of
their installation and unloading (Fig. 1).
Fig. 1. Structural diagrams of shells withfalse geometry examined in the mounting state.
Installation of these shells can be carried out with the use of solid scaffolding and conductors,
or pre-enlarged arch-type mounting sections, by a mounted method [1-4]. Currently, the
optimal method of installation for flat shells is the use of enlarged mounting elements up to 24
m long [2, 4,7]. In this case, each enlarged prefabricated element is a vaulted structure with a
temporary installation delay [3, 7].
We also study the possibilities of applying an effective installation method for composite and
conjugate shells of unique buildings with a square or arbitrary plan (Fig. 1).
To solve this problem, we have studied the stress-strain state of prefabricated monolithic
composite shells at the stages of installation, unloading,and transition during operation.
Table 1.
Characteristics of the studied types of shells and models
INTERNATIONAL JOURNAL OF ARTIFICIAL INTELLIGENCE
ISSN: 2692-5206, Impact Factor: 12,23
American Academic publishers, volume 05, issue 06,2025
Journal:
https://www.academicpublishers.org/journals/index.php/ijai
page 1684
№
Item
no
. Test shells, marking
of elements
Sketch
Scale,
dimensions
B
Appointment
3
Flat ribbed shells of
positive
Gaussian
curvature with a
square plan H-1
60x60 m
Study of the stress-strain state at various
levels and combinations of installation
load. Identification of rational methods for
mounting and dismantling the shell.
The analysis of the test results of composite shells of curvature with dimensions of 4.8 x 4.8
m,12 x 12 m; and 18 x 36 m is performed.
To identify a rational method of
mounting and unloading composite shells, the removal of tightening forces was performed with
the mounting racks lowered and raised.
Sequences of their influence on the operation of the entire coating were studied.
Static operation of the shell during installation and operation was analyzed in three types of
connections of the central and side shells:
The stress-strain state was determined on models of free-standing shells in the linear operation
area loaded with a load of 1.7 kN /
m2
.
After that, we studied two
main ways of unloading. In the first method, the mounting beams were first lowered, then the
forces in the mounting puffs were removed, in the second method, the mounting puffs were first
removed, then the mounting beams were lowered. The unraveling options were repeated three
times.
The separation of the mounting equipment from the coating occurred first at the edges of the
mounting beams with a 4 mm draft of the racks, then in the middle zone of the shell with a 15
mm draft of the racks. The separation of all mounting equipment from the shell occurred when
the racks were drained by 20 mm.
The initial tightening forces of the central and side
shells when lowering the mounting beams were reduced by 20-35%. This made it much easier
to dismantle puffs. At the same time, a more favorable character of the stress state in the ribs of
the shell panels was observed.
When lowering the mounting beams, the greatest deflection in the central shell was 2.85 mm, or
1/1174 span, in the side shell-2.2 mm, or 1/1542 span. Further removal of forces in the
installation puffs led to an increase in the deflections of the central and lateral shells by 1.2 and
1.15 times, respectively.
In composite shells with side elements of negative and positive curvature measuring 12x12 m,
their stress-strain state was studied by experimental methods at the stages of installation, long-
term operation, and transition from the installation stage to the operational one. Installation of
the shell was carried out from enlarged arched elements. The enlarged element at the stage of
installation was a self-supporting structure. Before sealing the joints, the enlarged elements
worked as a system of separate vaulted structures that were not connected to each other.
References:
1. Zhukovsky A. Z. Combined unified coatings of public buildings in the Crimea / / Concrete
and reinforced concrete, 1980, No. 7, pp. 16-20.
INTERNATIONAL JOURNAL OF ARTIFICIAL INTELLIGENCE
ISSN: 2692-5206, Impact Factor: 12,23
American Academic publishers, volume 05, issue 06,2025
Journal:
https://www.academicpublishers.org/journals/index.php/ijai
page 1685
2. Dykhovichny Yu. A., Zhukovsky E. Z. Prostranstvennye sostavnye konstruktsii [Spatial
composite structures], Moscow: Vysshaya shkola Publ., 1989, 288 p.
3. Bartenev V..S., Zhikharev V. K., Kuznetsov V. V. Determination of the stress-strain state
of reinforced concrete spatial coatings from installation impacts. / Metal structures in
construction. Collection of works No. 152. Moscow, MGSU. 1979. pp. 170-175.
4. Razzakov S. R. Composite reinforced concrete shells of building coverings in conditions of
long-term operation and seismic impacts. Tashkent, Fan Publishing House of the Academy
of Sciences of the Republic of Uzbekistan, 2004, 380 p.
5. Shugaev V. V., PSokolov B. S., Paskhin D. V. Experimental and theoretical studies of the
vaulted coating made of panels of KZHS. / / "Construction mechanics and calculation of
structures" No. 5, 2007. pp. 67-73
6. Razzakov N. S. On the calculation of flat shells of positive curvature using the moment
theory.// Proceedings of the interuniversity practical conference. Collection of scientific
papers. Issue 10, Tashkent: TashiitPubl., 2015, pp.81-84.
7.
Razzakov N. S. Reinforced concrete coverings of unique large-span buildings under
construction. Tashkent: AnRUZ Fan Publishing House. 2022. -217 p.
8. Bolikulovich, K. M., & Po‘latovich, M. B. (2024). CALCULATION OF THE
TEMPERATURE FIELD OF EXTERNAL ENCLOSING STRUCTURES USING THE
FINITE DIFFERENCE METHOD. Innovative: International Multidisciplinary Journal of
Applied Technology (2995-486X), 165-169.
9. Nosirova, S., & Matyokubov, B. (2023). Ways to increase the energy efficiency of external
barrier
constructions
of
buildings.
Евразийский
журнал
академических
исследований, 3(3), 145-149.
10. Matyokubov, B. P., & Saidmuradova, S. M. (2022). METHODS FOR INVESTIGATION
OF THERMOPHYSICAL CHARACTERISTICS OF UNDERGROUND EXTERNAL
BARRIER STRUCTURES OF BUILDINGS. RESEARCH AND EDUCATION, 1(5), 49-
58.
11. Матёкубов, Б. П., & Саидмуродова, С. М. (2022, August). КАМ СУВ ТАЛАБЧАН
БОҒЛОВЧИ
АСОСИДАГИ
ВЕРМИКУЛИТЛИ
ЕНГИЛ
БЕТОНЛАР
ТЕХНОЛОГИЯСИНИ
ҚЎЛЛАНИЛИШИ.
In
INTERNATIONAL
CONFERENCES (Vol. 1, No. 15, pp. 103-109).
12. Turakulovna, E. M. U., & Pulatovich, M. B. (2023). Devorlarning issiqlikka chidamliligini
oshiruvchi materiallarning xususiyatlari. Journal of engineering, mechanics and modern
architecture, 765-768.
13. Egamova, M., & Matyokubov, B. (2023). Improving the energy efficiency of the external
walls of residential buildings being built on the basis of a new model project. Евразийский
журнал академических исследований, 3(3), 150-155.
14. Egamova, M., & Matyokubov, B. (2023). Ways to increase the energy efficiency of
buildings and their external barrier structures. Eurasian Journal of Academic Research, 3(1
Part 1), 186-191.
15.
Bolikulovich, K. M., & Pulatovich, M. B. (2022). HEAT-SHIELDING QUALITIES AND
METHODS FOR ASSESSING THE HEAT-SHIELDING QUALITIES OF WINDOW
BLOCKS AND THEIR JUNCTION NODE WITH WALLS. Web of Scientist:
International Scientific Research Journal, 3(11), 829-840.
