基于环境激励法的高层钢筋混凝土剪力墙结构自振周期经验公式研究

基于环境激励法对97栋高度在45 m~100 m的高层钢筋混凝土剪力墙结构进行动力性能测试，识别结构在水平纵、横两个方向上的基本自振周期、第二阶自振周期和第三阶自振周期。对前三阶自振周期进行回归分析，分析各主轴方向上高宽比对前三阶自振周期的影响，给出水平纵、横两个方向上前三阶自振周期的经验公式及其分布范围，给出统计学意义上的高阶自振周期与基本自振周期间的关系，并利用两个相关结构算例对公式的可靠性、有效性进行验证。该文的研究是对《建筑结构荷载规范》（GB 50009—2012）中结构自振周期经验公式相关规定的补充和完善。

STUDY ON EMPIRICAL FORMULA OF NATURAL VIBRATION PERIOD OF HIGH-RISE REINFORCED CONCRETE SHEAR WALL STRUCTURE BASED ON ENVIRONMENTAL MOTIVATION METHOD

A total of 97 high-rise reinforced concrete shear wall structures with the height between 45 m and 100m were selected for the vibration tests based on the environmental motivation method in order to identify the fundamental period,the second natural period and the third natural period in the horizontal and longitudinal directions.The regression analysis was employed to analyze the effect of the height-width ratio to the natural vibration period periods.The empirical formula for the natural vibration period and distribution range of the high-rise reinforced concrete shear wall were presented.The relation between a high order natural vibration period and the fundamental period were statistically developed.The formulas were verified by using two examples.The research is a supplement and perfection to the relevant regulations of the empirical formula of the structural natural vibration period in the Load code for the design of building structures(GB 50009-2012).