THREE-DIMENSIONAL SEISMIC RESPONSE OF TEN-STORY STEEL FRAMES WITH YIELDING BASE PLATES ALLOWED TO UPLIFT

Mitsumasa MIDORIKAWA, Tomofumi SUDO, Tetsuhiro ASARI, Tatsuya AZUHATA, Tadashi ISHIHARA
2009 Journal of Structural and Construction Engineering (Transactions of AIJ)  
Previous studies have suggested that rocking vibration accompanied with foundation uplift motion might reduce the seismic damage of buildings subjected to severe earthquake motions. In this paper, the seismic response of ten-story steel frames with columns allowed to uplift is evaluated and compared with that of fixed-base frames by numerical analyses. It is shown that the base shears in the frames with column uplift are significantly reduced as compared to the fixed-base frames, and that the
more » ... rtical component of earthquake motions does not much affect the horizontal responses of uplift frames but increases slightly the uplift response displacement of uplift frames.
doi:10.3130/aijs.74.495 fatcat:jrcunw7kvjaqdmfj6itbl6bkpa