PRACTICAL SEISMIC RISK ASSESSMENT OF EXISTING BUILDING BY USING DAMAGED DATABASE OF 1995 HYOGOKEN NANBU EARTHQUAKE

Abstract

The objective of this paper is to evaluate fragility curve and repair cost in terms of each structural damage level based on the damaged database of 1995 Hyogoken Nanbu Earthquake. The seismic risk of a mid-to-high-rise building in Kobe is calculated through the analytical results. As a result, the following are verified : 1. The expectation of repair cost per square meter is about 29,000yen for minor damage, about 60,000yen for moderate damage, and about 64,000yen for major damage. 2. The seismic risk of a mid-to-high-rise building in Kobe, that is normalized by initial construction cost, is about 3.2 percent on condition that design lifetime is assumed to be 50 years.