高层钢筋混凝土框架-核心筒结构抗震安全评价

Seismic safety evaluation of tall RC frame-corewall structures

为了对高层钢筋混凝土框架-核心筒结构的抗震安全性能做出评价,在太平洋地震工程研究中心(PEER)基于性能抗震设计方法的基础上,采用我国地震危险性分析的研究成果,利用三维非线性分析程序CANNY建立地震反应分析模型,确定地震波样本选择方法,引入相对谱值调整系数,对结构的安全性能进行预测,由此给出了适合于我国规范的结构抗震安全评价方法。利用此方法对一钢筋混凝土框架-核心筒结构进行了分析,对算例的抗震安全性能指标和位移特性做出预测,分析结果表明,此方法可行,可以用于单体结构的抗震安全评价中,当进行某类结构的抗震安全评价时尚需考虑分析模型和结构设计的不确定性。

In order to assess seismic safety of tall RC frame-corewall structures,based on performance-based earthquake engineering method of PEER（Pacific Earthquake Engineering Research）,seismic safety evaluation method serving for China was established by adopting Chinese earthquake risk analysis results,constructing analysis model using the 3D nonlinear analysis program CANNY,determining selection method of earthquake records,introducing relative spectrum value adjusting factor.Using the proposed method seismic safety of a RC frame-corewall structure was assessed,safety index and drift properties were estimated.As a result,the proposed method is feasible and can be applied to single tall structure.Uncertainties of analysis model and structural design need be considered when assessing some types structures.