NONLINEAR BEHAVIOR OF RETROFITTED REINFORCED CONCRETE BEAM COLUMN JOINTS SEVERELY DAMAGED FROM EARTHQUAKE LOAD SIMULATION

• Main Author: GOSAL (NIM : 25017043), NELSON
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29602
• Institution: Institut Teknologi Bandung

<p align="justify">An earthquake resistant structure should have certain performance level when struck by certain level of earthquake such as when it is a strong level earthquake, it may deform inelastically without any significant strength degradation to prevent any fatalities. When it is struck by a design earthquake, it may experience slight damage, but still can be repaired and reused, and when it is struck by a mild earthquake, it should be able to be reused directly. Reparations are usually done on slightly damaged structures to recover their functions. However, for severe damaged structures, reparation is usually not applied due to further study needed on the effectivity of the repairs. One of the repair methods that have been studied a lot is reinforced concrete jacketing. While it can recover the function of damaged structures, this method is usually wasteful and even change the structures’ failure mechanism. Therefore, this study was done to analyse the behavior of severely damaged structures due to earthquakes, which were repaired by only replacing the damaged concretes with high strength concretes. Specimens used in this study are reinforced concrete beam column joints that have previously been applied cyclic loads up to 5% drift. Damaged concretes are then removed and replaced with new high strength concretes while the reinforcement bars are not replaced. Specimens are also modelled analytically while their behaviors and damages are compared with their initial conditions. There are reductions in stiffness when comparing both specimens against their analytical models. When comparing against their initial condition, there are also reductions in stiffness, deformability and energy dissipated on both repaired specimens, but there is an increase in maximum lateral capacity on specimen SD16-R during negative loading. After evaluating by ACI 374.1-05, both specimens fulfill 4 out of 5 criterias given. <p align="justify">