STRUCTURAL DESIGN OF AN EARTHQUAKE-RESISTANT 74-STORY MIXED-USE BUILDING WITH OUTRIGGER & BELT TRUSS SYSTEM IN CENTRAL JAKARTA

• Main Author: Hafizh Riyanto, Muhammad
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/82385
• Institution: Institut Teknologi Bandung

The demand for multifunctional high-rise buildings in urban areas such as Central Jakarta is increasing, along with population growth and land constraints. Therefore, a mixed-use building that emphasizes the concept of one-stop-service property was developed. Oasis Central Sudirman is a super high-rise building project that consists of two towers. The first tower is a 74-story (325.05 m) mix-used building and the second tower is a 65-story (275.60 m) residential building. There are also 5 basement levels that are used as vehicle parking lots and are planned to accommodate up to 1600 vehicles. In the first tower, there is a podium structure that functions as a 5-story retail building that supports the tower structure. In this final project, the building to be designed is the first tower that is used as a mixused building. The material used in this building is a reinforced concrete. The main structural system used in this building is a special coupled corewall and a special moment-resisting frame system complemented by steel outriggers and belt truss is optimized to provide better seismic performance and optimal space efficiency. The structural modeling was performed in 3D using CSI ETABS software to analyze the response of the building to the loads. Floor plans were obtained from architectural drawings and structural element dimensions were determined based on SNI 2847:2019. The gravity and lateral loads used in the analysis refer to SNI 1727:2019, ASCE 7-16, SNI 1726:2019, and the Indonesian Earthquake Hazard Deaggregation Map. Earthquake load analysis is performed using response spectrum analiysis (RSA) and linear time history analysis (LTHA) based on SNI 1726:2019. The building structure shall include complete lateral and vertical force-resisting systems capable of providing adequate strength, stiffness, and energy dissipation capacity to withstand the design ground motions within the prescribed limits of deformation and strength demand. The structure is designed to satisfy the requirements of earthquake-resistant structures, which include modal participation mass ratio, equivalent lateral force, dual system requirements, horizontal and vertical irregularities of the structure, story drift, structural stability (P-Delta effects), and redundancy factor. The reinforcement design of structural elements based on the capacity design principle is performed based on the forces obtained from the LRFD load combination and refers to SNI 2847: 2019 / ACI 318-19. Design of beam reinforcement, including longitudinal, transverse and torsion bars. Design of column reinforcement, including longitudinal, confinement and transverse bars. Design of slab reinforcement, including longitudinal and transverse bars. Shear wall reinforcement design, including longitudinal, transverse and special boundary element (SBE) reinforcement. Design of coupling beam reinforcement, including diagonal, transverse and longitudinal bars. The strong column-weak beam (SCWB) and beam-column connections requirements were also checked to ensure that the structure remains ductile during the earthquake. In addition, the detailing of structural elements must be well designed to ensure that the structure will be able to dissipate earthquake energy through inelastic displacement mechanisms without collapsing.