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Student Dormitory of Andalas University is one of the buildings for new students who come from outside of Padang, Indonesia. In 2015, Andalas University received aid from the Public Works Ministry of Indonesia to build the dorm. It was planned by a designed consultant using reinforced concrete (RC) structure with a straight shape (I-shaped) RC shear wall. The review results of the design from the Technical Engineer of Andalas University indicated that the designed building does not have enough carrying capacity to resist the accumulation of all combined internal and external loads acting on the building structure. Therefore, the strengthening of the building structure should be done. In the present study, the strengthening method is proposed by modifying the I-shaped RC shear wall (I-shear wall) to be L-shaped RC shear wall (Lshear wall), which is installed at the building corners. The L-shear wall was installed on the building in two ways, that is only on the 1st floor (2nd – 5th stories using I-shear wall) and on all building stories. The effect of the L-shear wall in the building performance has been investigated based on parameters such as internal forces of structural elements, story displacement, and story drift. The presence of L-shear wall only on the 1st floor reduced the shear force and bending moment of columns and beams on the 1st floor and no much effect on the other floors, while the addition of the L-shear wall on all stories decreased the internal forces on columns and beams in all stories. The reduction of the inter-story drift of the building was more decreased by the installment of the L-shear wall on all stories.

THE EFFECT OF L-SHAPED RC SHEAR WALL ON STUDENT DORMITORY BUILDING OF ANDALAS UNIVERSITY, PADANG-INDONESIA