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提出了一种运用静力推覆和FEMA440等效线性法求解结构体系地震反应折减系数的直接方法,运用此方法分析了按同一剪重比设计的3层、6层、9层的屈曲约束支撑混凝土框架地震反应折减系数,并用时程分析对结果加以验证。结果表明:运用此方法求解R值能够避免了繁琐的试算过程,具有足够的精度和保证率,屈曲约束支撑混凝土框架R值相比普通混凝土框架有明显提高。
A direct method to solve the seismic response reduction coefficient of structural system by static nappe and FEMA440 equivalent linear method is proposed. By using this method, the buckling constraints of 3, 6 and 9 layers designed by the same shear-weight ratio Support the reduction coefficient of seismic response of concrete frame, and verify the result with time-history analysis. The results show that using this method to solve the R value can avoid tedious trial calculation, with sufficient precision and guaranteed rate. The R value of the RC frame with buckling restraint is obviously higher than that of the ordinary concrete frame.