THE EFFECT OF I-SHAPE SHEAR WALL POSITION ON STRUCTURAL DEVIATION IN RUSUNAWA BUILDING IN DOLOK SANGGUL CITY, NORTH SUMATERA
Keywords:
Earthquake Load, Shear Wall, SAP2000, Structure Deflection, Placement VariationAbstract
Excessive structural deviation occurs when large lateral loads act, one of which is earthquake load. If the structural deviation exceeds the permitted limit, the building is susceptible to collapse. One method that can be applied is the addition of shear walls. This study aimed to determine the effect of the position of the shear wall on the structural deviation in a 3-story Rusunawa Building in Dolok Sanggul City, North Sumatra Province. The placement of the I-shape shear wall is modeled with 4 different position variations. The modelling of the review building structure was carried out with the help of the SAP2000 V.20 application following the provisions of SNI 1726:2019. The results of this study indicate that the placement of shear walls in variation 3 in the building core reduces the x-direction deviation value of each floor by 88.690%, 96.839% and 96.806%, while the y-direction deviation value on each floor is reduced by 88.701%, 97.524% and 97.319%. The placement of shear walls in variations 1 and 2 increases the value of the x-direction structural deviation by 1.786% and 2.381% on the 1st floor, increases by 2.207% and 2.467% on the 2nd floor and increases by 2.357% and 2.678% on the 3rd floor. The value of the y-direction structural deviation in variations 1 and 2 decreases by 92.090% and 92.090% on the 1st floor, decreases by 97.890% and 97.918% on the 2nd floor and decreases by 97.152% and 97.187% on the 3rd floor. It can be concluded from the study that the position has a significant effect on the performance of the shear wall. The placement of the shear wall in the same direction as the lateral load effectively reduces the structural deviation. The placement of the shear wall that is not in the same direction as the lateral load will cause stiffness instability so that the structural deviation increases and the placement of the shear wall at the center of mass of the building effectively reduces the deviation in both directions of the building axis.