EFFECT OF THE MODEL CORRELATING STRUCTURAL DAMAGE TO REPAIRING COST ON STRUCTURAL DEMAND SPECTRA BASED ON LIFE CYCLE ECONOMIC LOSS IN HIGH SEISMIC ZONE

摘要

In high seismic zones, the repairing cost of structural damage for the maintenance of buildings is more important because the cost due to moderate to major earthquake may increase the life cycle cost of the building. This paper reports the result of a study on the structural demand based on the life cycle loss and on the effect of a repairing cost model; relation between the damage and repairing cost, on the life cycle economic loss. Buildings are modeled as single-degree-of-freedom systems with non-linear hysteresis model subjected to multiple earthquake record expected in their life cycle duration. The total repairing cost for maintains the functionality of the building was calculated using the models. Four models are arbitrarily chosen for representation of relation between the damage and repairing cost, considering the non-linearity in the relation. Calculated results are compared in terms of the expected total economic loss, which are function of strength and ductility capacity of the structural system and length of life cycle. It is revealed how the expected total economic loss and the life cycle length effect on the structural demand. It is also revealed that the total life cycle economic loss is sensitive to the repairing cost modeling. If the damage increases in earlier stage of damage, the expected life cycle economic loss becomes larger.