考虑层间分布质量的框架-剪力墙结构地震反应分析

Seismic response analysis of the frame-shear wall structure considering distributed mass

对于具有楼层集中质量和层间墙体分布质量的框架-剪力墙结构,采用分段连续化模型,考虑楼层集中质量和墙体质量实际分布,在层局部坐标中建立运动微分方程,运用频域内的传递矩阵,结合傅氏变换,进而求出框架-剪力墙结构的地震反应。算例表明:该方法适用于分析质量或结构刚度沿高度有变化的框架-剪力墙结构;考虑层间质量分布对结构地震反应和自振频率的影响是必要的。

For the frame-shear wall structure with lumped mass of floors and distributed mass of walls,a piecewise continuum model was established.The motion differential equations were derived in storey coordinates.Combined with Fourier transform,the transfer matrix in frequency domain can be used to obtain the seismic response analysis of the frame-shear wall structure.The results show that this method is suitable for analyzing the frame-shear wall structure with variable mass or stiffness distributed along the height;and considering the mass distribution effect on the seismic response and the natural frequency of the structure is necessary.