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Control of Seismic Drift Demand for Reinforced Concrete Buildings with Weak First Stories

Author: Manabu Yoshimura 1) 1) Department of Architecture, Tokyo Metropolitan University, Minamiosawa 1-1, Hachioji, Tokyo, | Size: 730 KB | Format: PDF | Quality: Unspecified | Publisher: Earthquake Engineering and Engineering Seismology, Vol. 4, No. 1 | Year: | pages: 9

This paper studies seismic drift demand for RC buildings with weak first stories, the potential seismic vulnerability of which has been revealed in many past earthquakes including the 1995 Kobe and 1999 Chi-Chi earthquakes. In a building that collapsed during the Kobe earthquake the strength balance between the first story and the upper stories is shown to have had a significant effect on the collapse of this building. Nonlinear dynamic analyses are then conducted for a model representing weak-first-story buildings to study the first story drift demand, where the first-story strength and the strength balance along the height are taken as analysis variables. Based on the results,
conditions that the two parameters should satisfy for controlling the first-story drift demand within an allowable level are discussed.

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