DESIGN AND STRUCTURAL PERFORMANCE ANALYSIS OF THE TSUNAMI VERTICAL EVACUATION BUILDING IN KELUMBAYAN DISTRICT, LAMPUNG PROVINCE

• Main Author: Fadhilah Ramadhani, Hanan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74234
• Institution: Institut Teknologi Bandung

Kelumbayan District, Tanggamus Regency, Lampung Province is one of the areas prone to potential tsunamis and earthquakes due to Sunda Strait Megathrust tectonic activity and Krakatau Volcano activity. As a tourism area that attracts many visitors, tsunami disaster mitigation efforts are needed because of the unconditional event of tsunamis. One of the alternative mitigation solutions that can be applied in Kelumbayan is to build vertical evacuation buildings (GEV) at several points that are critical to the impact of tsunamis. People can save themselves and take shelter temporarily in the GEV structure when the tsunami arrives. This study will discuss the GEV design process based on tsunami inundation depth data using tsunami propagation modeling due to Sunda Strait Megathrust with a maximum magnitude (Mw) of 8,7. The design process of this GEV includes location, total, capacity, and structure elevation planning. Of several GEVs to be built, one type of GEV, which has 4 floors level, was selected to be analyzed as a special moment-bearing frame system (SRPMK). The results showed that tsunami load affected the performance of GEV more than earthquake load. The most influential tsunami load is the debris impact forces. After being loaded with tsunami and earthquake loads, analysis of performance levels can be performed using nonlinear pushover static analysis. The pushover analysis reveals that the GEV structure is at the immediate occupancy level, allowing it to be used when a designed earthquake occurs. With its current structural capabilities, the GEV structure can be utilized as a tsunami evacuation building. The results of the GEV structure’s performance level has met the standards as an earthquake-resistant building, allowing the GEV structure in this research to be utilized as an evacuation building against tsunami.