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Abstrak :
[ABSTRAK
Semakin bertambahnya kebutuhan ruang vertikal di kota besar seperti Jakarta membuat para ahli membangun banyak bangunan bertingkat. Meski demikian, rencana ini tidak selalu efektif oleh karena keberadaan bangunan purbakala (heritage) yang harus dilestarikan. Oleh karena itu, bangunan baru harus dibangun menggunakan sistem transfer yang dalam penelitian ini berupa kombinasi antara balok transfer prategang parsial dan kolom-kolom pendukung. Analisa pushover akan dilakukan untuk bangunan ini sehingga kinerja bangunan pada fase inelatis dapat diketahui. Hasil bangunan sistem transfer akan dibandingkan dengan hasil analisa pushover pada bangunan regular untuk mengetahui pengaruh keberadaan sistem transfer terhadap kinerja inelastik struktur. Sebelum dilakukan analisa pushover, bangunan didesain secara dinamik linear dengan mengacu pada peraturan SNI 03-1726-2012 dan SNI 03-2847-2002. Hasil perbandingan menunjukkan pertambahan degree of prestressing akan memperkecil daktilitas dan kemampuan disipasi energi bangunan. Rasio pengurangan kemampuan disipasi energi bervariasi antara 15% - 23%. Kinerja terendah seluruh bangunan pada saat target perpindahan ialah Life Safety, yang mana merupakan level kinerja Basic Safety Objectives berdasarkan FEMA 356. Dari sini dapat ditarik kesimpulan bahwa peraturan yang digunakan dalam desain mampu menghasilkan bangunan dengan performa cukup baik.

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ABSTRACT
The increasing need of vertical room in Jakarta made experts build a lot of multistories buildings. Nonetheless, this plan is not always effective because of the presence of heritage building which must be preserved. Consequently, new building must be built using a transfer system which in this research is a combination between partially prestressed transfer beam and supporting columns below the beam. To determine the inelastic performance of the building, pushover analysis will be applied. The pushover analysis result for transfer system building later will be compared with the result for regular building to understand the effect of transfer system to structure?s inelastic performance. Prior to applying pushover analysis, both buildings are designed based on SNI 03-1726-2012 and SNI 03- 2847-2002 codes. The comparison shows the degree of prestressing accretion will reduce the ductility and energy dissipation capacity of the building. The reduction of energy dissipation capacity ratio varies between 15% - 23%. The lowest performance of both buildings at target displacement is Life Safety, which is the Basic Safety Objectives performance based on FEMA 356. From this, it can be concluded that the codes used in designing the building is able to produce building with quite good performance., The increasing need of vertical room in Jakarta made experts build a lot of multistories buildings. Nonetheless, this plan is not always effective because of the presence of heritage building which must be preserved. Consequently, new building must be built using a transfer system which in this research is a combination between partially prestressed transfer beam and supporting columns below the beam. To determine the inelastic performance of the building, pushover analysis will be applied. The pushover analysis result for transfer system building later will be compared with the result for regular building to understand the effect of transfer system to structure’s inelastic performance. Prior to applying pushover analysis, both buildings are designed based on SNI 03-1726-2012 and SNI 03- 2847-2002 codes. The comparison shows the degree of prestressing accretion will reduce the ductility and energy dissipation capacity of the building. The reduction of energy dissipation capacity ratio varies between 15% - 23%. The lowest performance of both buildings at target displacement is Life Safety, which is the Basic Safety Objectives performance based on FEMA 356. From this, it can be concluded that the codes used in designing the building is able to produce building with quite good performance.]

Abstrak :
Kebutuhan perluasan ruang vertikal di daerah perkotaan terutama Jakarta terkadang mengalami hambatan dari keberadaan bangunan purbakala yang harus dilestarikan. Oleh karena itu bangunan baru yang ingin dibangun diatas bangunan purbakala harus menggunakan sistem transfer, yang dalam penelitian ini berupa balok prategang dan kolom pendukungnya. Terletak pada wilayah gempa, nantinya beban gempa termasuk gempa vertikal dan beban gravitasi akan dikerjakan pada bangunan bertingkat yang akan diteliti. Selain itu, untuk menjamin bahwa sistem transfer tidak gagal terlebih dahulu daripada komponen struktur lainnya, gaya gempa pada sistem transfer diperbesar dengan faktor kuat lebih yang diambil berdasarkan SNI 03-1726-2002. Hasil penelitian menunjukkan bahwa kinerja sistem transfer akan semakin baik dengan penambahan dimensi dari balok prategang. Selain itu, kinerja sistem transfer akan semakin baik seiring dengan pertambahan jumlah lantai yang dipikulnya. Displacement pada titik tengah balok prategang akan semakin berkurang seiring peningkatan jumlah lantai dengan profil dan gaya prategang yang berbeda-beda serta akan berkurang juga seiring dengan peningkatan dimensi balok prategang. Dapat dilihat juga dengan adanya sistem prategang pada balok transfer, kebutuhan tulangan longitudinal non-prategang pada balok dapat berkurang.

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The need of vertical expansion in cities especially Jakarta sometimes has obstacle from the existence of heritage building which should be kept. Therefore the new building intended to be built above the heritage building must use particular transfer system, in this research it would be a prestress beam and its supporting column. Located in seismic region, later a seismic load including its vertical and horizontal component and gravity force will be assigned to the multi-story building. In addition, to guarantee the transfer system doesn?t fail before the other structural components do, seismic forces for transfer system will be scaled up with excessive strength factor based on SNI 03-1726-2002. This research shows that the performance of transfer system will be better with the increase of transfer beam dimension. Furthermore, the performance of transfer system also will be better with the increase of number of stories. Displacements at transfer beam mid-span will be less with increasing amount of stories held with different transfer beam dimensions and different prestress loads, also will be less with the increase of prestress beam dimension. It is observable since the existence of prestress system at transfer beam, the need of non-prestress longitudinal reinforcement will be reduced.