为研究耗能梁段连接构造和震后替换对装配式偏心支撑钢框架抗震性能的影响，对5个装配式K型偏心支撑钢框架进行拟静力循环加载试验。结果表明，耗能梁段连接构造对装配式偏心支撑钢框架抗震性能影响较大，当耗能梁段端板采用平齐端板连接时，随着耗能梁段连接端板厚度的增加，结构的承载能力、延性和耗能能力均呈上升趋势；当耗能梁段采用外伸式端板连接时，结构的承载能力、耗能能力相较耗能梁段采用平齐端板连接均有较大提升；对耗能梁段采用不同端板形式的两框架进行震后替换耗能梁段发现,替换后框架各项抗震性能指标并无明显下降，说明这两种结构皆具有良好的可替换性，但耗能梁段采用外伸式端板连接的框架替换性能更好。
关键词：装配式；偏心支撑；抗震性能；拟静力试验；可替换；
Abstract
In order to study the influence of energy dissipation beam connection structure and post-earthquake replacement on the seismic performance of prefabricated eccentrically braced steel frames, quasi-static cyclic loading tests were carried out on five prefabricated eccentrically braced steel frames. The results show that the connection structure of the energy dissipation beam section has a great influence on the seismic performance of the prefabricated eccentrically braced steel frame. When the end-plate of the energy dissipation beam section is connected with the flush end-plate, with the increase of the thickness of the end-plate of the energy dissipation beam section, the bearing capacity, ductility and energy dissipation capacity of the structure show a upward trend. When the energy-dissipation beam is connected by an extended end-plate, the bearing capacity and energy dissipation capacity of the structure have greatly improved. It is found that the seismic performance index of the replaced frame does not decrease significantly compared with the original frame after the earthquake, indicating that both structures have good replaceability, but the frame with extended end-plate connection for the energy dissipation beam has better replaceability.
Key words: prefabricated; eccentrically braced frame; seismic performance; pseudo-static test; replaceable
关键词
装配式 /
偏心支撑 /
抗震性能 /
拟静力试验 /
可替换
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Key words
prefabricated /
eccentrically braced frame /
seismic performance /
pseudo-static test /
replaceable
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