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[提要]  進(jìn)行鋼框架彈塑性靜動(dòng)力分析時(shí)，各單元恢復(fù)力模型的選用直接影響分析結(jié)果的精度。作者對(duì)鋼框架的柱、梁及節(jié)點(diǎn)板域單元的恢復(fù)力特性進(jìn)行了討論分析，給出了簡(jiǎn)化的線性單元恢復(fù)力模型，并給出了拐點(diǎn)的處理方法。算例分析表明本文的恢復(fù)力模型是可靠的。
[關(guān)鍵詞]  鋼框架 恢復(fù)力模型 彈塑性 靜動(dòng)力分析 拐點(diǎn)

When making the elasto-plastic static and dynamic analysis of steel frame, it is important for accurate analysis to select the suitable restoring force model of elements. The restoring force characteristics of the steel frame elements are discussed, and the linear restoring force models of elements are established. The calculating examples verify that the propsed models are reliable.
Keywords: steel frame; restoring force model; elasto-plastic and static dynamic analysis; turning-point