Nwe Nwe Win, Thazin Thein
Seismic isolation is an effective method for the seismic protection of buildings. However, its adoption is often limited due to financial considerations. In this research, the cost benefit of steel building, considered as both base isolated and fixed base supported, under earthquake excitations is investigated taking into account the respective total construction cost and base isolation cost including installing cost of either case. The propose building is eight-storeyed residential steel building located in Mandalay. The base isolation system that is utilized lead rubber bearing which made up of Myanmar rubber (RSS-1 and RSS-3). The diameters of RSS-3 are greater 1.53 times than the diameters of RSS-1 depending on the type of rubber properties. The performance assessment is done in term of probable damage cost and repair time which are computed by using fragility curves and FEMA P-58 methodology in Performance Assessment Calculation Tool (PACT). In this study, the net present value of the avoided annual average loss for RSS-1 is greater than RSS-3 at MCE seismic demand levels. So, RSS-1 is more economical and greater seismic capacity to use as major component of base isolators.
Cost Benefit, Fragility Curve; Lead Rubber Bearing; Myanmar Rubber; Performance Assessment Calculation Tool