Yuya Takase

VERIFICATION OF THE TOGGLE DAMPING SYSTEM FOR THE SRC BUILDING DURING THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE

A steel frame reinforced concrete building completed in 1965 was seismically retrofitted using seismic isolation braces with amplification mechanism. The building was subjected to shaking with a seismic intensity of upper 5 during the 2011 off the Pacific coast of Tohoku Earthquake. The seismic retrofit applied, however, minimized damage. The seismic retrofit performance was then examined based on the ground motions recorded in the building and the results of seismic response analysis using the records. As a result, it was revealed that the retrofit design goal was met and that the deformation of the building was controlled considerably as compared with the case with no retrofit.

CONSIDERATION OF SEISMIC RETROFITTING EFFECT OF 10-STORY RESIDENTIAL BUILDING RETROFITTED USING DAMPING SYSTEM WITH AMPLIFIER MECHANISM

In the 2011 off the Pacific Coast of Tohoku Earthquake, many seismic retrofitted buildings were subjected to strong motion. The 10-story residential building that was retrofitted using damping system with amplifier mechanism was one of these buildings. In order to verify the effect of seismic retrofitting, we investigated the building condition and calculated story drift angle by seismic response analysis. As a result, the safety of this building was confirmed. Furthermore, we verified when partial walls were in failure using the modified compression field theory. It is concluded that the effect of partial walls on structural performance was less.