EVALUASI KINERJA STRUKTUR BANGUNAN TINGGI APARTEMEN GRAND SHAMAYA TOWER AUBREY SURABAYA

EVALUATION OF THE PERFORMANCE OF HIGH-RISE BUILDING STRUCTURE GRAND SHAMAYA APARTMENT TOWER AUBREY SURABAYA

Pertumbuhan urbanisasi yang pesat meningkatkan kebutuhan hunian vertikal, terutama di kota metropolitan seperti Surabaya. Apartemen Grand Shamaya yang memiliki ketinggian 44 lantai terletak di kawasan tanah lunak, menggunakan sistem struktur dinding geser beton bertulang khusus. Penelitian ini bertujuan mengevaluasi kinerja struktur eksisting terhadap beban lateral akibat gempa dan mengoptimalkan desain struktur. Hasil analisis menunjukkan bahwa struktur eksisting tidak memenuhi beberapa persyaratan, seperti simpangan antar tingkat maksimum dan koefisien stabilitas akibat pengaruh P-Delta yang melebihi batas izin SNI 1726:2019. Oleh karena itu, dilakukan kajian ulang dengan menerapkan sistem struktur ganda pada tiga model modifikasi yaitu penambahan elemen kolom, pembesaran dimensi kolom dan balok, serta perubahan orientasi elemen struktur. Hasil evaluasi menunjukkan bahwa modifikasi ketiga, yaitu pembesaran dimensi elemen struktur menghasilkan kinerja optimal dengan simpangan antar tingkat maksimum sebesar 54,225 mm (arah X) dan 55,759 mm (arah Y) tidak melebihi drift limit 70 mm, serta koefisien stabilitas maksimum sebesar 0,084 (arah X) dan 0,083 (arah Y) tidak melebihi  0,091. Desain modifikasi struktur ini sesuai dengan SNI 2847:2019 dan prinsip strong column weak beam sehingga meningkatkan kestabilan dan keamanan bangunan. Dengan demikian, optimalisasi struktur kolom dan balok berperan signifikan dalam meningkatkan kinerja struktur terhadap beban lateral gempa.

Kata kunci: Evaluasi Kinerja, Optimalisasi Struktur, Pengaruh Stabilitas P-Delta, Simpangan Antar Tingkat.

The rapid growth of urbanization has increased the need for vertical housing, especially in metropolitan cities such as Surabaya. The Grand Shamaya Apartment, which has a height of 44 floors, is located in a soft soil area, using a special reinforced concrete sliding wall structure system. This study aims to evaluate the performance of existing structures against lateral loads due to earthquakes and optimize structural design. The results of the analysis show that the existing structure does not meet several requirements, such as the deviation between the maximum levels and the stability coefficient due to the influence of P-Delta which exceeds the SNI 1726:2019 permit limit. Therefore, a review was carried out by applying a dual structure system to three modification models, namely the addition of column elements, the enlargement of column and beam dimensions, and the change in the orientation of structural elements. The evaluation results show that the third modification, namely the enlargement of the dimensions of the structural elements, produces optimal performance with a maximum inter-level deviation of 54.225 mm (X direction) and 55.759 mm (Y direction) not exceeding the drift limit of 70 mm, and the maximum stability coefficient of 0.084 (X direction) and 0.083 (Y direction) does not exceed  0.091. The design of this structural modification is in accordance with SNI 2847:2019 and the principle of strong column weak beam so as to improve the stability and safety of the building. Thus, the optimization of column and beam structures plays a significant role in improving the performance of the structure against the lateral load of the earthquake.