THE EFFECT OF AVERAGE SEISMIC BASE COEFFICIENTS ON THE RISK OF FAILURE OF TALL BUILDINGS WITH OUTRIGGER AND BELT TRUSS STRUCTURAL SYSTEM

• Main Author: RENARD - Nim: 25017038, YONATHAN
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31767
• Institution: Institut Teknologi Bandung

<p align="justify">The design of tall buildings has becoming popular in this modern era. Limited horizontal land influence developers to use vertical land to fulfill the space requirements. Outrigger and belt truss structural system is one of the alternatives that commonly used in designing tall buildings. However, Indonesian codes and standards have not specifically regulated the design of tall building which cause inefficiency in structural element design. Many coefficients are considered too conservative when applied to very tall buildings design that use outrigger and truss belt structural systems. One of significant coefficients is the seismic base coefficient. According to the earthquake-resistant building codes in Indonesia (SNI 1726: 2012), every building with a high period will be limited by minimum seismic base coefficient values which increase the building shear forces. The value is tested to be replaced by using the average coefficient, which is a function of the minimum coefficient and the original coefficient of the building. As a validation that this average coefficient can be used in designing tall buildings with outrigger and truss belt structure systems, a probabilistic analysis of building collapse is carried out using risk integral method. The result is the use of the average coefficient fulfilled the collapse requirements of the tested buildings with the outrigger and belt truss system with 80 and 100 levels. Both buildings have a probability of collapse of less than 1% in 50 years.<p align="justify">