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首页> 外文期刊>International journal of steel structures >New Approach to Evaluate the Response Modification Factors for Steel Moment Resisting Frames
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New Approach to Evaluate the Response Modification Factors for Steel Moment Resisting Frames

机译：评估钢制抗弯框架响应修正系数的新方法

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摘要

The design force levels currently specified by most seismic codes are calculated by dividing the base shear for elastic response by the response modification factor (R). This is based on the fact that the structures possess significant reserve strength, redundancy, damping and capacity to dissipate energy. This paper proposed the evaluation methodology and procedure of the response modification factors for steel moment resisting frames. The response modification factors are evaluated by multiplying ductility factor (R_μ) for SDOF systems, MDOF modification factor (R_m) and strength factor (R_S) together. The proposed rules were applied to existing steel moment resisting frames. The nonlinear static pushover analysis was performed to estimate the ductility (R_μ), MDOF modification (R_M) and strength factors (R_s). The results showed that the response modification factors (R) have different values with various design parameters such as design base shear coefficient (V/W), failure mechanism, framing system and number of stories.
机译：当前大多数地震规范所指定的设计力水平是通过将弹性响应的基本剪切力除以响应修正系数（R）来计算的。这是基于这样的事实，即这些结构具有显着的储备强度，冗余度，阻尼和消散能量的能力。提出了抗弯矩框架响应修正系数的评价方法和程序。通过将SDOF系统的延性因子（R_μ），MDOF修正因子（R_m）和强度因子（R_S）相乘来评估响应修正因子。拟议的规则适用于现有的钢制抗弯框架。进行了非线性静态推覆分析，以估计延性（R_μ），MDOF修正（R_M）和强度因子（R_s）。结果表明，响应修正因子（R）在设计基准剪力系数（V / W），破坏机理，框架体系和层数等各种设计参数下具有不同的值。

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