《建筑抗震设计规范》增加了"建筑抗震性能设计"的条文,提出了四性能水平的具体指标及实现抗震性能设计的参考方法。为了验证该方法的合理性,针对一钢筋混凝土框架结构实例,分别对框架结构梁、柱构件不同性能要求的承载力以及整体结构的层间位移进行了验算。结果表明:为了满足各性能水平在罕遇地震下的承载力要求,梁、柱构件的配筋量急剧增加;同样,为满足各性能水平在罕遇地震下的层间位移要求,结构构件的截面尺寸增加很多,不符合经济合理的设计原则;抗震规范建议的层间位移参考指标,对于性能3,罕遇地震下的指标偏低;对于性能4,设防烈度地震下的指标偏低。
The clause of performance-based seismic design of structures was added to,Code for Seismic Design of Buildings,which proposed specific indexes of four performance levels and reference procedures to achieve the objectives of performance-based seismic design.In order to verify the rationality of the method,a reinforced concrete frame structure was taken for example,the bearing capacity of the frame beam and column elements as well as the storey drift of the structure were calculated.The results show that if the bearing capacity requirements of different performance levels were satisfied for the rare earthquake action,the section sizes and reinforcing bars quantity of the frame beam and column elements would be increased sharply.Similarly,in order to meet the storey drift demands of different performance levels for the rare earthquake action,the cross-sectional dimensions of the frame components would be increased greatly,which can not conform to the economic and rational design principles.The storey drift reference indexes proposed by the code,on the performance of 3,were low for the rare earthquake action;and on the performance of 4,were low for the fortification intensity earthquake action.