Assessment and retrofitting analysis of an office building in Riau province, Indonesia based on the current building codes.

An office building is designed to accommodate the activities of a company. Every office building must have a strong, rigid, and stable structure in carrying the load such that it can be used according to its function. Regular inspections of the reliability of existing office buildings must be carried out, especially if an update of the building codes has been introduced. In this study, a structural evaluation of an office building in Riau province, Indonesia was carried out based on the current Indonesian building standards. The structural analysis considering all the working loads on the building includes the dead, live, wall, and earthquake loads. For earthquake loading, a dynamic earthquake load with the Spectrum Response using SNI 1726:2019 was used in this analysis. This building was modeled and analyzed using the ETABS v.16 software. The evaluation of the structural capacity of the building was carried out on columns and beams. The capacity of the column was evaluated from a column interaction diagram (P-M diagram) and the shear capacity of the column, while the flexural and shear capacities of the beams were analyzed using Indonesia Standard SNI 2847:2019. The results of the analysis show that the building does not have sufficient capacity, especially on the second and third-floor beams. Therefore, it is necessary to retrofit the weak beams of the building. In this study, the retrofitting method of the beams was designed using Fiber Reinforced Polymer (FRP), a fiber material that is glued to the bottom beams by a matrix substance, such as epoxy or polyester. The finding of the research is the capacity of the retrofitted building structure has increased, which is capable to resist the working loads. [ABSTRACT FROM AUTHOR]