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《建筑抗震设计规范》(GB 50011—2010)规定,消能减震设计计算中,主体结构基本处于弹性工作阶段时可采用线性分析方法计算,按消能减震结构总阻尼比确定地震影响系数。其中,确定消能器的附加阻尼比是计算地震响应系数的关键。考虑到消能器附加阻尼比规范算法各项参数选取的困难,SAUSAGE软件给出了基于非线性时程分析结果的附加阻尼比规范算法,同时,也给出了基于能量的附加阻尼比算法。从实际工程出发,对比了这两种附加阻尼比计算方法的计算结果,并分析了差异原因;同时对比了两种附加阻尼比等效线性分析与非线性分析层间剪力的误差,结果表明,基于能量算法得出的附加阻尼比更符合实际;最后,探讨了地震波选取及附加阻尼比计算时刻对计算结果的影响,给出了一些工程应用的建议。
The “Code for Seismic Design of Buildings” (GB 50011-2010) stipulates that in the energy dissipation design calculation, when the main structure is basically in the elastic work stage, the linear analysis method can be used to calculate the seismic influence coefficient according to the total damping ratio of the energy dissipation and damping structure. . Among them, determining the additional damping ratio of the energy absorber is the key to calculating the seismic response coefficient. Considering the difficulty in selecting parameters of the additional damping ratio of the energy absorber, the SAUSAGE software gives an additional damping ratio specification algorithm based on nonlinear time history analysis results. At the same time, an additional energy-based damping ratio algorithm is also given. Starting from the actual project, the calculation results of these two additional damping ratio methods are compared and the causes of the differences are analyzed. At the same time, the error of the equivalent linear analysis and the nonlinear analysis of the interlaminar shear force of the two additional damping ratios are compared. The results show that The additional damping ratio based on the energy algorithm is more in line with reality. Finally, the influence of the selection of the seismic wave and the calculation time of the additional damping ratio on the calculation results is discussed. Some engineering application suggestions are given.