International Joint Research on Earthquake Disaster Mitigation of Buildings in Republic of Korea

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The Korean seismic design provision was developed in 1988. In present seismic design for building is compulsory in Korea. The seismicity of Korean peninsula is between low and moderate. Basically the Korean seismic provision was developed based on Uniform Building Code and ATC 3-06 provision. One of the objectives of this research is to investigate the relationship between the seismic design method in Korean seismic provision and ISO 3010. The major parameters included in both provisions were classified and compared. They are seismic intensity, importance factor, seismic hazard zone factor, strength reduction factor, and spectral ordinates. The vertical distribution of seismic force and shear of two provisions is also investigated and compared. Based on the investigation it is concluded that the most prominent difference between these two provisions is the limit states under consideration. In ISO 3010 two limit states are explicitly considered which are for serviceability and ultimate. … More In Korean provision one limit state is considered which is ultimate limit state. However, the provision in progress of revision considers two limit states for operation and collapse prevention.The Korea Ministry of Construction and Transportation and The Earthquake Engineering Society of Korea established a new guideline for performance-based seismic design in 1997. In the guideline the seismic coefficients for construction of the design spectrum were provided for double performance levels, functional and collapse prevention performance levels, and for earthquakes with various recurrence periods. In this study a steel framed structure was designed in accordance with the conventional single-level seismic design code, and was analyzed using capacity spectrum method to evaluate the nonlinear performance of the structure subjected to the strong earthquake load corresponding to the collapse prevention performance objective. The maximum inter-story drift was compared with the performance criteria specified in the new guideline to check whether the building structure designed in accordance with the conventional design code satisfy the performance criteria recommended by the new performance-based seismic design guideline. It was found that the model structure, although designed for the conventional single level earthquake load, retains enough margin for safety for the earthquake load of 2,400 year return period (earthquake level for collapse prevention performance objective). It was also found that for the given model structure the results from the capacity spectrum method generally coincide well with those obtained from the time history analysis. Less