框架-剪力墙结构隔震支座设计值的优化选择方法

Optimalizing selection method of design value of vibro-isolation bearing in frame-shear wall structure

采用传统重力荷载代表值选取框架-剪力墙隔震支座的方法(简称为GM)难以避免隔震支座拉应力超出允许值的问题.针对该问题,将罕遇水平地震影响系数减少至1/3～1/2的反应谱输入抗震结构,把计算所得的结构抗倾覆力因素作为隔震支座选择的依据,提出一种针对框架-剪力墙隔震结构的设计方法(简称为G-RM).通过对分别运用两种方法设计的模型进行计算对比,结果表明G-RM在框架-剪力墙隔震结构设计中能够更为准确地选择隔震支座,有效避免隔震支座拉应力超出允许值.采用G-RM可以使框架-剪力墙隔震结构设计更为便捷有效.

Should the traditional method of gravity load representative value(GM for short)was used to select the vibro-isolation bearing of the frame-shear wall,it would be difficult to avoid such a problem that the tensile stress in the vibro-isolation bearing exceeds its allowable value.Aimed at this problem,the influencing coefficient of the rare horizontal earthquake was reduced by 1/3 to 1/2 of response spectrum and then was inputted into the anti-seismic structure,the anti-overturning force factor of the structure was evaluated and taken as a basis of selection of the vibro-isolation bearing,and a design method of vibro-isolation structure for frame-shear wall(G-RM for short)was presented.It is shown by computation and comparison of models designed with two approaches that in the design of the vibro-isolation structure of frame shear wall,the vibro-isolation bearing can be selected more precisely by means of G-GM and the excessive tensile stress in the vibro-isolation bearing will be avoided effectively.Utilization of G-RM will be able to make the design of the vibro-isolation structure of frame-shear wall easier,faster,and more valid.