Abstract
The changing of SNI 03-1729 from 2002 to 2015 which refer to AISC 2010 change the method of steel stability analysis from effective length method (ELM) to direct analysis method (DAM). DAM use second order elastic analysis, accommodate strength reduction, geometric imperfection presented as notional load, and take buckling factor (K) equal to 1. Numerical study has been conducted to find out the appropriate magnitude of notional loads on concentric braced frame subjected to seismic load in Indonesia. Experimental results from three different calibration frames from previous research were used as reference. The frames consisted of 1-story, 3-stories, and 5-stories were reanalyzed by using SAP software with four different methods: ELM first order elastic analysis, ELM second order elastic analysis, and DAM with different notional loads coefficient as 0.002 and 0.003. Seismic loads according SNI 1726:2012 in three seismic regions were considered.
Highlights
The rapid change of constructions building leads to complex structural analysis
This section is discussed about comparison study between the use of effective length method (ELM) and direct analysis method (DAM) for steel stability analysis according to AISC 2010 and Indonesian design code of steel structure
ELM with the first-order elastic analysis is introduced, SNI 2015 which refer to AISC 2010 allow ELM second-order elastic analysis
Summary
The rapid change of constructions building leads to complex structural analysis. A long time ago structural analysis was conducted manually, and some simplification was taken. Research has been carried out to get a better understanding of structural behavior, and the results have been accommodated into design code. The design code should be updated several times to adapt to the new invention in structural analysis and design. Indonesia is late in accommodating the change of structural steel building design code which was referred to AISC 360-10. SNI 03-1729-2015 [1], design code for steel structural building in Indonesia is a revision of the former code of SNI 03-1729-2002 [2]. One of significant change from AISC 2005 to 2010 is steel structure stability analysis. DAM was introduced in AISC 2005 as an alternative to steel https://doi.org/10.10 51/matecconf /201927601005 stability design. Until 2015, ELM is the main method for steel structural stability in Indonesia according to SNI 2002. ELM can be used if the ratio of maximum second-order drift to maximum firstorder drift (both determined for LRFD load combinations or 1.6 times ASD load combinations) in all stories is equal to or less than 1.5 [4]
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