Impacts of near-field wave motion on seismic response of a reinforced concrete frame structure
A one-dimensional time-domain method was used to convert seismic wave into equivalent nodal loads.The far-field foundation radiation damping was simulated by three-dimensional viscous-elastic artificial boundary elements.Two three-dimensional finite element models of reinforced concrete frame structures based on the assumption of rigid foundation and considering near-field fluctuations were established,and the internal force and displacement dynamic time-history response were compared.The research shows that considering near-field wave motion can prolong the natural vibration period of reinforced concrete frame structures;com-parison with the assumption of a rigid foundation shows that at the observation point,the amplitude of the ben-ding moment at the beam end increases,the amplitude of the axial force decreases,and the amplitude of the shear force changes;the amplitude of the bending moment at the column end decreases,the amplitude of the axial force increases,and there are also differences in the amplitude of the shear force;both the top point's displacement and the inter-story displacement attenuate.
NETL
NSTL
万方数据
