Masaharu Kubota

VERIFICATION ON STRESS TRANSMISSION PERFORMANCE OF ADDITIONAL SLAB FOR RETROFIT METHOD OF OUTER FRAME TYPE UTILIZING DAMPING SYSTEM

In order to verify the performance of a seismic retrofit method that connects additional slabs with outerfreme installed damping system to the existing building, dynamic loading tests were conducted. For the form of retrofit, whether or not the additional slabs have sufficient stress transfer capacity is important. In this study, the stress transfer capacity of slabs were verified. As a result, it was verified that the stress transfer capacity remained intact and that the damping system were effective for controlling vibrations. It was also found that an evaluation model considering additional slabs could appropriately evaluate the results of tests.

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.