设计用地震作用水准对框架结构超强的影响

The effect of design seismic action on frames construction overstrength

国外多数抗震设计规范对各种类型结构建议了3档延性等级和地震力调节系数的可选择方案,并考虑了不同程度的超强,通过对我国9度区3跨6层钢筋混凝土框架结构进行的非线性动力反应分析,结果表明,赋予不同屈服水准的框架结构具有相近的超强水准。

Three ductility degrees and corresponding force modification factors for different structure types are suggested in foreign seismic codes, and take into account overstrength factor varied. Through inelastic dynamic response analysis of 3-hay ＆ 6-story reinforced concrete frames systems which are endowed with different design seismic action in Earthquake Intensity Region 9, it is verified that those frames exist approximative overstrength level under separate earthquake action.