DAMAGE DETECTION OF BRIDGE GIRDER ELEMENTS BASED ON CHANGES IN NODAL FLEXIBILITY ON SIMPLE PEDESTALS

• Main Author: Robert
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/66698
• Institution: Institut Teknologi Bandung

This paper presents the analysis to be able to detect any damage to the bridge girder element based on the data obtained from the measurement results of the bridge's SHMS sensor. This analysis is important as an indication of damage to the bridge girder. With the known of the damage, bridge maintenance can be carried out more precisely according to the damage level of bridge girders. However, the analysis of girder damage from the bridge SHMS sensor is still rarely done. Hence, it is necessary to do a numerical analysis that can process the result data from the SHMS sensor which can detect damage to the bridge girder elements. Numerical analysis has been carried out to detect damage of the bridge girders using nodal flexibility change approach. In principle, changes in nodal flexibility occur due to a reduction in properties caused by damage to the bridge girder section. The higher the change in the value of nodal flexibility, the more severe the damage to the bridge girder. To compare the level of damage, damage to the bridge is made in several types of damage such as flexural damage, shear damage, spalling damage, and elevated temperature. The bridges analyzed are modeled for 2 types of bridge girder materials, for concrete bridge girders and steel bridge girders. The two bridges were analyzed separately with the same damage detection analysis method. Analysis for damage detection and damage location of bridge girders using 30 and 10 high modes of the bridge structure. These are done to accommodate measurements where only high modes of the bridge structure can be obtained. From this analysis shows that with the damage to the bridge girder, there is a change in the value of nodal flexibility. After that, to be able to show the location where the girders were damaged, a one-way Z test analysis was carried out based on the normal distribution. The results obtained from the analysis of 30 and 10 high modes of the bridge structure show that there is damage according to the location of the damaged element.