Seismic Retrofit Methods of Eccentric Existing Reinforced Concrete Buildings Following DPT 1303-57 and Building Control Act, B.E.2564

Abstract

This article presents the seismic retrofit methods of eccentric existing building structure. The study found that when using the seismic acceleration value according to Building Control Act, B.E.2564 to the building built before B.E.2564 and located in Muang District Chiang Mai Province, the results shown unsafe and inadequate column strength and shear wall strength. Seismic upgrading is required for the existing building. Various seismic retrofit methods were used in this study such as adding new piles and foundations, adding new piles to existing foundations with new reinforcement lapping method, strengthening shear wall by Fiber Reinforced Polymer, FRP method, and adding new shear walls.