Research Information System
International Istiklal Symposium: Earthquake and Space, Kahramanmaraş, Turkey, 6 - 08 February 2024, pp.50
Steel space truss system (SSTS) is lightweight and high-strength. This
system is used on the roofs of buildings such as stadiums, airports, swimming
pools, halls, aircraft hangars, conference halls, and trade centers. Since less
material is used in SSTS, it is more economical than traditional systems. Determining
the suitable elements to be used in such a SSTS is important in terms of cost. In addition, seismic isolation
systems reduce the horizontal loads on the structure and enable smaller section
reversals to occur in the sections. This positively affects the cost by enabling the use of elements with
smaller cross-sections. In this study, optimization of SSTS with and without seismic isolation was performed
using the newly developed SapRao algorithm. In previous studies, the
optimization process was performed using the Rao_1, Rao_2, and SapRao
algorithms in the SSTS. Because the analysis results showed that the SapRao
algorithm was more effective for this SSTS, this algorithm was used in this
study. MATLAB codes and Open Applicable Programming Interface (OAPI) properties
of SAP2000 were used in the optimization process. The main objective function of the
optimization process is to minimize the total weight of truss elements. Load combinations of the consisting of self-weight,
coating load, wind load, and seismic loads. Response spectrum analysis was
carried out as a dynamic analysis. Single concave friction
pendulum (SCFP) was used as an isolation system. The analysis results obtained
from seismic isolation structure and fixed structure were compared to each
other. The analysis results show that while the total weight of the fixed SSTS
was 488 kN, the total weight of the seismic isolated SSTS was 268.73 kN. The
seismic isolation system reduced the weight by 44.92% during the optimization
process with the SapRao algorithm.