Comparative study of SNI 1726:2012 and SNI 1726:2019 guidelines for response spectrum 2D method (study case: GKT II building of Bengkalis State Polytechnic)

Abstract

A standard code for designing earthquake-resistant buildings in Indonesia has always improved and updated year by year. It starts 1983, SNI 1726:2002, SNI 1726:2012, and the latest one SNI 1726:2019 Standard Codes. There is a procedure scope change for designing seismic load to become wider due to the adoption of a new standard, SNI 1726:2019. This research aims to compare the building design by using the response spectrum 2D method of SNI 1726:2012 and 2019 to determine the safety of existing buildings that use the old code. The structure of the building is modelled as a classroom and office building with a height of 15.50 m in Bengkalis State Polytechnic, Riau Province, namely Gedung Kuliah Terpadu (GKT) II Building. The reviewed structure behaviors are internal forces (bending moment, shear, and axial forces) on the structural elements (beams and columns). The result is directly proportional to rising in SDS and SD1 by 3.60% and 19.02%, respectively. By this rising, it affects the response spectra graph that has increased in SNI 1726:2019. The results prove that the change of design by using SNI 1726:2012 to 2019 has an effect, even though the calculation of the building structure forces still uses the old codes, but it meets the safe limits using designing with the SNI 1726:2019 method. This paper also compares the design of the structural elements by using SNI 2847:2019 codes with the planning of the existing building before. Overall, the building structure can be classified as able to withstand seismic force based on the new standard method.