Structural evaluation of cement silo building at PT. Semen Padang (Persero) based on current Indonesian building standards.

A silo building is a storage area that serves to store granular materials. The Teluk Bayur Cement Silo Building is one of the industrial buildings at PT Semen Padang which function as a storage place for bulk cement before distributing it to other places. The Teluk Bayur Cement Silo Structure was built in 1996 using a prestressed concrete wall without any structural column. The building was designed by PT Partono Fondas using previous Indonesian building standards: SKBI-1.3.53.1987, SKSNI-T-15-1991-03, and PPTGIUG 1983. The Silo had 150 mm thickness at the roof plate, 400 mm thickness at the upper wall, 600 mm thickness at the cone wall, and 1000 mm thickness at the bottom wall with the section of the ring beam was 1000 x 1000 mm. In this building, the yield strength of steel (fy) were 240 MPa and 400 MPa for plain and deformed reinforcements, respectively, while the compressive strength of the concrete (fc') was 36.4 MPa, which was obtained from the hammer test results. Due to the change in Indonesian Building Standards, a structural analysis should be carried out to check the silo capacity in resisting the working loads. In this study, the current building standards including SNI 1727:2020, SNI 1726:2019, and SNI 7833:2012 were used in analyzing the silo building using the commercial software. SAP2000. The loads acting on the silo include dead, live, stored materials, earthquake, and wind loads. The structural analysis was carried out to determine the structural responses of the silo building such as the natural period of the structure, the prestressed force and losses in prestress, the plate deflection due to prestressed force, the prestress strength of radial moments, and silo deviation. The silo prestresses wall capacity was also calculated including wall tension control and reinforcing steel analysis. The result of the analysis shows that all the structure responses meet the permit limit requirements according to the Current Indonesian Standards Building. The finding of the research is that PT Semen Padang's Teluk Bayur Cement Silo still strong enough capacity to withstand the working load based on the current Indonesian Building Standards. [ABSTRACT FROM AUTHOR]