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为分析基础偏心对非对称结构平扭耦联的影响,建立了考虑基础偏心的地基土-非对称结构相互作用运动方程。利用强解耦方法解耦后,编制MATLAB程序。分别详细分析了基础质量偏心率和刚度偏心率对上部结构地震反应的影响程度。得出基础质量偏心率对上部结构的影响很小,而基础刚度偏心率对上部结构的影响相对明显,尤其是对结构扭转反应的影响。通过对基础刚度偏心率为?0.6与0.6两种情况进行时程分析,验证了参数分析所得到的规律。
In order to analyze the influence of basic eccentricity on the translational-torsional coupling of asymmetric structures, an equation of motion of soil-asymmetrical structure interaction considering the basic eccentricity was established. Decoupled by strong decoupling method, the preparation of MATLAB program. The effects of eccentric mass eccentricity and eccentricity on the seismic response of the superstructure are analyzed in detail. It is concluded that the eccentricity of the foundation mass has little effect on the superstructure and the influence of the eccentricity of the foundation stiffness on the superstructure is relatively obvious, especially on the torsional response of the structure. By analyzing the time-history of two cases, the eccentricity of the base stiffness is 0.6 and 0.6, the law of parameter analysis is verified.