circular railway
1.Based on the resultes obtained from 29 representative Single line pile-sup-ported railway bridge piers calculated by matrix displacement method andseismic design response spectra, a quadratie regression formula for the firstnatural circular frequency of pile-supported bridge piers is presented. Formu-las for shear coefficient q_0 and moment coefficient m_0 are also given respec-tively for site of category Ⅱ and Ⅲ.
