Building Structure Under The Earthquake Response Analysis Of Energy And Application Of Research

In recent years, energy-based seismic design is a hot research project, many researchers think that it is one of the development direction of earthquake engineering. On the basis of energy conception, the thesis deals with the energy response of single-degree of freedom structure and multi-degree of freedom structures by employing the method of dynamical time-history analysis.The thesis analyzes energy response of single-degree of freedom structure under seismic loads, and the influences of restoring force models, damping ratios and strength coefficients on the energy response of single-degree of freedom are discussed in details. From the analysis, it is shown that the energy response of single-degree of freedom structure is nearly correlative with its dynamic characteristics and amplitude oIn the thesis, the calculation formulas of multi-degree of freedom system energy response under seismic loads are deduced, and the corresponding program is edited. From the study of different damping models, it is shown that the damping has greater influence on energy response of structure. In the same model, damping energy of structure and its proportion of total energy are almost linearly increased with the increase of damping ratio, and hysteretic energy of structure and its proportion of total energy are accordingly decreased. For the same damping ratio, damping energy and hysteretic energy vary 15% to 35% to the input energy in different models. And the different damping ratio has little influence on the input energy in the same models. From the study, it is shown that the value of damage index is decreased with the increase of damping ratio.At last, structure damage is estimated by the Park & Ang damage model, and it is shown that the energy response is useful in seismic response and evaluation of structure damage. And it is feasible that overall damage is evaluated with damage index of D.