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分别对框架结构中安装耗能减震装置前后进行了水平地震作用的推覆分析,揭示了由于耗能支撑的安装使框架柱轴力明显增加这一现象。这种轴力的增加,可能会超过柱轴力设计允许值。提出了验算耗能支撑带给框架柱附加轴力的计算方法及验算过程,同时改进了耗能减震结构的设计流程,使得耗能减震技术进一步完善。数值算例揭示了耗能支撑的安装对框架柱轴力的影响,轴压比过大引起框架柱延性降低,柱端过早出现塑性较,设计中应引起足够的重视。
The pendulum analysis of the horizontal seismic action before and after the installation of the energy dissipating shock absorber in the frame structure was carried out, which revealed that the axial force of the frame column increased obviously due to the installation of energy dissipation brace. This increase in axial force may exceed the design allowable value of column axial force. The calculation method and checking process of adding additional axial force brought by energy dissipation support to frame column are put forward. At the same time, the design flow of energy dissipation structure is improved, which further improves energy dissipation technology. Numerical examples show the influence of energy dissipation on the axial force of the frame column. When the axial compression ratio is too large, the ductility of the frame column decreases and the plasticity of the column end prematurely appears. Therefore, sufficient attention should be paid to the design.