肖建庄  陈  隽  张其云  李  杰
  （同济大学  上海 200092）

[提要]  对异型柱框-桁架结构模型进行了强震和强余震两个阶段的模拟地震振动台试验，以模拟实际结构经常受到的主震、余震型地震作用的情况。分析了异型柱框-桁架结构在强震作用下从弹性阶段直接进入弹塑性阶段的动力反应特点，揭示了余震阶段地震反应的拟线性性质。验证了异型柱框-桁架结构的抗震性能。
[关键词]  异型柱框-桁架结构  振动台

A K-braced frame structure model with T-shaped, L-shaped, and+-shaped column is tested and investigated on shaking table. In order to study the seismic behavior of this kind of structure, all the tests both before and after the strong earthquake with principal-secondary sequence are studied carefully. Many important results,including the earthquake response and the earthquake resistance behavior, are discussed and analyzed. The braced frame with special-shaped columns is excellent in resisting of earthquake.
Keywords: special-shaped column; braced frame; shaking table test