Simplified wave propagation analysis of high-rise buildings under vertical earthquakes

Abstract:

To study the impulse wave effect of high-rise buildings under vertical earthquake near fault region, simplified wave propagation method is adopted. In elastic range, typical structural system is simplified as one and two dimensional model, and reflection and transmission coefficients of longitudinal wave through lumped mass are determined. Structural vertical seismic macro response is calculated by simplified wave propagation method in which difference time delay and FFT filter are used. The analysis shows that, compared with the vibration method, the wave propagation method is more targeted in calculating structural vertical seismic response, especially under impulse-type vertical earthquake. The axial force fluctuation and relative movement caused by vertical earthquake can not be ignored.