Lateral load pattern in pushover analysis |
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| Authors: | Email author" target="_blank">Sun?JingjiangEmail author Tetsuro?Ono Zhao?Yangang Wang?Wei |
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| Institution: | 1. Institute of Engineering Mechanics, China Seismological Bureau, Harbin 150080, China
2. Department. of Architecture, Nagoya Institute of Technology, Nagoya 466-8555, Japan |
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| Abstract: | The seismic capacity curves of three types of buildings including frame, frame-shear wall and shear wall obtained by pushover
analysis under different lateral load patterns are compared with those from nonlinear time history analysis. Based on the
numerical results obtained a two-phase load pattern; an inverted triangle (first mode) load pattern until the base shear force
reachesβ times its maximum value, Vmax, followed by a (x/H)α form, hereβ and α being some coefficients depending on the type of the structures considered, is proposed in the paper, which can provide
excellent approximation of the seismic capacity curve for low-to-mid-rise shear type buildings. Furthermore, it is shown both
the two-phase load pattern proposed and the invariant uniform pattern can be used for low-to-mid-rise shear-bending type and
low-rise bending type of buildings. No suitable load patterns have been found for high-rise buildings. |
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| Keywords: | pushover analysis performance-based seismic design lateral load pattern nonlinear time history analysis |
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