罕遇地震荷载作用下屈曲约束支撑框架结构弹塑性位移的简化计算方法

摘要

针对罕遇地震荷载作用下的屈曲约束支撑框架结构,从附加有效阻尼比的角度出发,系统的分析了罕遇地震时,屈曲约束支撑框架结构体系弹塑性位移的简化求解方法,并将此简化求解方法的计算结果与十条地震波的弹塑性时程分析结果平均值进行对比,结果表明,该简化算法准确有效.%Aiming at a buckling-restrained braced frame under severe earthquakes, using additional effective damping ratio and energy principle, a simplified calculation method to solving its elastic-plastic displacement was systematically analyzed. Here, the detailed calculating method and steps were presented. Moreover, the comparison analysis between the result of the simplified calculation method and the mean of the results of ten seismic waves'elastoplastic time-history analyses was carried out. It was shown that the simplified calculation method is a correct and effective one.