STRENGTHENING DESIGN OF THE ODESSA HOLDING CIRCUS

Abstract

In this article, various designs are available that provide  high quality data, as 
well  as  requirements  for  the  weight  of  details  that  require  installation  in  preparation  for  the 
presentation of new programs of performances. Lack of analysis of the real picture of the stress-
strain  state  in  the  sections  of  the  metal  elements  of  arch  trusses  leads  to  the  cancellation  or 
reduction of the  new program of performances,  which  are offered  by artists  from other cities of 
Ukraine and other countries. The solution to the existing problem  is an urgent task that requires 
calculations using modern software systems and the results of studies of changes in the properties 
of metal during the long-term operation of metal structures. 
With the development of the computer industry,  much greater opportunities have appeared 
that help to build  more accurate design  schemes and simulate  more realistic  loads and take  into 
account the deterioration of structures. This  leads to increased reliability, strength and durability 
during the reconstruction of structures of long-time construction. 
To check the effectiveness of the amplification performed and to determine the presence of 
the load-bearing capacity reserve of the bearing truss dome arches and their operation in the spatial 
calculation scheme, the calculation was performed using the LIRA-SAPR software package. 
The performed computer modeling and calculation made it possible to obtain the values of 
deformations and internal forces in the structural elements of truss arches under the action of static 
and dynamic loads, as well as to determine the maximum permissible ultimate load. 
The analysis of the dome calculation results made it possible to take the appropriate correct 
decisions regarding the possibility of increasing the dynamic load that arises with time when circus 
performers meet, or the need for additional reinforcement of structures to ensure reliable operation 
of the building, taking into account current regulatory requirements. 
Based on the calculations, it is recommended that the maximum load on the upper ring (at the 
location of the walls of the technical room and the weight of the process equipment with the weight 
of the props of the performing circus artists), which is - 8 kN/m. 
Upon reaching a load value of 10 kN / m, an unacceptable deflection appears, which can lead 
to a loss of the bearing capacity of the structure. To increase the load on the dome more than the 
recommended value of 8 kN / m, it is necessary to carry out measures to strengthen the supporting 
structures, especially the elements of the support unit and the lower belts of the bearing ferries 
(dome ribs) at the junction with the support nodes.