Evolution and Implications of Changes in Seismic Load Codes for Earthquake Resistant Structures Design

Seismic load is a critical load that can trigger damage or collapse of structures, especially in earthquake-prone areas. The susceptibility of structures to seismic loads is influenced by factors related to soil characteristics and structural behavior. This paper comprehensively examines the development of Indonesian seismic code design parameters and their comparison with the current seismic code. The results of the analysis showed that the design spectral acceleration of short-period AD and long-period A۱ SKBI ۱۹۸۷ and SNI ۲۰۰۲ increased with increasing PGA values, with a consistent pattern of SC < SD < SE. Unlike the previous two codes, design spectral acceleration AD and A۱ SNI ۲۰۱۲ and SNI ۲۰۱۹ experience fluctuations in all types of soil. The ratio design spectral acceleration of AD and A۱ SNI ۲۰۱۹ to KBI ۱۹۸۷ and SNI ۲۰۰۲ varies; there are up, fixed, and down for SC, SD, and SE soil conditions. The ratio of design spectral acceleration AD and A۱ SNI ۲۰۱۹ to SNI ۲۰۱۲ designs also varies; this condition is due to changes in site coefficients. There were significant changes to the SKBI ۱۹۸۷ and SNI ۲۰۰۲ structural systems, especially the low and medium seismic levels. The increase in the seismic influence coefficient ratio of some cities varies for each type of soil and code. The increase in the ۱۹۷۰ PMI seismic coefficient was < ۳۰% for all soil types, and the highest percentage increase occurred in SC soil types. The increase in seismic coefficient in SKBI ۱۹۸۷, SNI ۲۰۰۲, and SNI ۲۰۱۲ is more dominant in SE soil types. Doi: ۱۰.۲۸۹۹۱/CEJ-۲۰۲۴-۰۱۰-۰۱-۰۴ Full Text: PDF

کلیدواژه ها:

Code ، Parameter and Design Load ، Seismic ، Base Shear ، Comparative.