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从抗倒塌角度出发,提出了部分柱顶滑移钢筋混凝土框剪结构的设想,并建议了具体的设计方法及步骤。通过弹塑性分析,初步比较了该类新型结构与常规框剪结构的经济性及弹塑性地震响应。研究结果表明:1)通过柱顶滑移释放部分框架柱的柱顶内力,可在造价略有增加的情况下,使结构具有更好的抗倒塌能力;2)与滑移柱顶相联的摩擦支座的摩擦系数在一定范围内时,该新型结构既具有与常规结构相近的抗侧刚度以确保小震不坏,又能在大震下确保结构的竖向承载能力以实现大震不倒。
From the point of view of anti-collapse, the author put forward the idea of some column-slipping reinforced concrete frame shear structure and proposed the specific design methods and steps. Through the elasto-plastic analysis, the economic and elasto-plastic seismic responses of the new structure and the conventional frame-shear structure are compared. The results show that: 1) The internal forces at the top of some frame columns are relieved by the top-of-column slip, so that the structure has better anti-collapse ability with a slight increase in cost. 2) When the friction coefficient of the friction bearing is within a certain range, the new structure not only has lateral rigidity that is similar to the conventional structure to ensure that the minor earthquake is not bad, but also ensures the vertical bearing capacity of the structure under great earthquake to realize the great earthquake inverted.