Improvement on steel dynamic hysteretic model and evolution to the seismic design of steel buildings

本研究系以结构钢之动态循环加载试验为基础，考虑结构钢之动态回滞特性，并评估钢结构建筑物抗震性能之应变率效应。首先，我进行了一系列的动态循环荷载试验的钢，普遍用作滞回阻尼器，柱，梁。无论何种钢，屈服强度均随应变速率的增加而增大。然而，强度的发光停止在大的塑性变形。应变速率仅在加载开始后的几个循环中受到影响。其次，在前人实验研究的基础上，建立了应变率对钢材性能影响的数据库。

This study is consideration of dynamic hysteretic characteristics based on the dynamic cyclic loading tests of structural steel and evaluation of strain-rate effect in seismic performance of steel buildings. First, I have conducted a series of dynamic cyclic loading test of steel which popularly used as hysteretic damper, column, and beam. Regardless of steel kinds, yield strength glowed up when strain-rate was increased. However, the glow of strength was stopped in large plastic deformation. Strain-rate was affected only several cycles after loading have started. Second, I made a database of steel performances affected strain-rate base on previous experimental studies.