Shaking and damages of super high-rise residential buildings during the 2011 off the pacific coast of Tohoku earthquake based on questionnaire survey

Abstract

A questionnaire survey about shaking and damages of the super high-rise RC buildings during the 2011 off the pacific coast of Tohoku earthquake was conducted for the residents. The survey was conducted for 15 super high-rise residential buildings in the Kanto and the Kansai areas in late July 2011, about 4 month after the main shock. The following conclusions were reached; (1) The anxiety during the main shock tends to be higher than the action difficulty with same questionnaire seismic intensity. (2) The relationship between questionnaire seismic intensity and the damages to the interior materials and the concrete member showed an inverse correlation. (3) The questionnaire seismic intensity and the action difficulty, the tendency of damage situations to the interior materials and concrete member differ between 2 buildings which are close to each other. (4) The building that built at an area where significant liquefaction had occurred suffered relatively-great damages. (5) At the lower part of the buildings, many residents heard a squeak sound of building during the main shock or the aftershock.