钢筋混凝土偏心受压构件抗震计算方法的讨论

A DISCUSSION ON SEISMIC RESISTANCE CALCU LATION FOR ECCENTRIC COMPRBSSION MEMBERS OF REINFORCED CONCRETE

按照规范的规定，只有在已知钢筋截面积Ａｓ、Ａｓ＇的情况下，才能对钢筋混凝土结构构件的截面进行抗震验算。但是当地震作用较大时，钢筋截面积Ａｓ、Ａｓ＇的计算往往是由一组有地震作用参与组合时的内力设计值所控制的。本文对矩形截面对称配筋的钢筋混凝土偏心受压构件在有地震作用参与组合时的内力设计值作用下直接求算钢筋截面积Ａｓ、Ａｓ＇的计算方法进行了讨论，说明了计算方法二的合理性，并举例加以说明。

According to the regulations of the codes, only when the areas As and As' of cross sections of steel are known, can the seismic resistance calculation be carried out for the cross-sections of reinforced concrete members. But when the earthquake actions are relatively large, the calculation of steel areas As and As' is often controlled by the design values of a group of forces which are obtained when the earthquake actions join in the combination. This paper discusses the calculation methods for directly calculating the steel areas As and As' of eccentric compression members of reinforced concrete with rectangular sections and symmetrical steel bars under the action of design values of forces including earthquake action combination, shows the rationality of calculation method two, and illustrates them with examples.