NUMERICAL STUDY ON THE DETERMINATION OF RESPONSE MODIFICATION FACTOR IN RETROFITTED CONFINED MASONRY STRUCTURE

• Main Author: Aurora Veda Talitha, Nerfita
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/82305
• Institution: Institut Teknologi Bandung

Most residential and public buildings such as mosques and schools in Indonesia are masonry wall structures categorized as non-engineered buildings. The risk of collapse for these buildings is significant given Indonesia's high earthquake potential. To address this, the reinforcement planning of confined masonry walls, including types of reinforcement and seismic aspects applicable to earthquake-resistant design, is necessary. One of these aspects is the response modification coefficient. Various reinforcement methods require classification by examining the failure patterns produced when these confined masonry walls are reinforced. Additionally, design aspects such as strength and ductility are reviewed to determine the appropriate response modification factor for designing these structures. This study evaluates the response modification coefficient values and the impact of reinforcement on confined masonry walls without detailing using two numerical methods: the graphical method and dynamic response analysis. The benchmark specimens in this study are confined masonry wall specimens with good beam-column and column-wall detailing. The first method examines the energy dissipation of inelastic systems from testing to determine the strength of elastic systems with the same energy dissipation. The second method evaluates the dynamic response using the Newmark-Beta method based on 10 earthquake acceleration data and input data from specimens tested in previous studies. Based on the data, two reinforcement categories were obtained based on the failure patterns produced: the first category is predominantly diagonal strut and the second category is predominantly sliding shear. The first category reinforcement, consisting of continuous anchors and lintel beams, is recommended as additional reinforcement because it can dissipate a considerable amount of energy, as evidenced by response modification factor values approaching those of well-detailed specimens.