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为了验证现有《建筑结构荷载规范》(GB50009—2001)提供的结构基本自振周期的经验公式是否适用于9度及9度以上地区的房屋结构,应用脉动法,通过对四川省西昌市(9度设防)典型房屋结构自振周期的测试,得到了与以往经验公式有较大差异的回归公式,为9度区反应谱方法的应用提供了依据。测试结果表明,结构平动第1阶自振周期横向和纵向都大致相等,第2阶自振周期一般是第1阶自振周期的0.30倍,扭转振动周期是第1阶自振周期的0.75倍。
In order to verify whether the empirical formula of basic natural vibration period provided by the existing “Code for Structural Load of Building Structures” (GB50009-2001) is applicable to the house structure in areas of 9 degrees and above, the pulsation method is applied. 9 degree fortification). The regression equation of the typical house structure with natural period is obtained, which is different from the past empirical formula, which provides the basis for the application of 9 degree area spectral response method. The test results show that the first-order natural oscillation period of the translational structure is approximately equal in horizontal and vertical directions. The second-order natural oscillation period is generally 0.30 times of the first-order natural oscillation period, and the torsional vibration period is 0.75 Times