水平撞击荷载作用下多层偏心框架结构的动力响应规律

Dynamic response rule of the multi-storey frame structure with mass eccentricity under horizontal impact load

为研究质量均匀和非均匀偏心体系框架结构在水平撞击荷载作用下的动力响应规律,设计了5组均匀和非均匀的质量偏心框架结构模型。试验结果表明,均匀偏心结构前期随着偏心率增长而增长,后期有下降趋势,质量偏心50%,结构的位移表现最强烈;非均匀偏心结构规律有所不同,随着二层偏心率的增大,二层的位移表现为先下降后增长的趋势;一、三层的位移随着偏心率的增长,位移表现为先增幅后下降的趋势,顶层位移最大。

Based on the test of 5 groups of frame structure with uniform and non-uniform mass eccentricity, this paper studied the dynamic response rules of the frame under the impact load. The results showed that for the frame structure model with uniform mass eccentricity,the displacement increased with eccentricity growth in the prophase and then presented the downward trend later, and the frame model with mass eccentricity of 50% showed strongest dynamic response. For the frame model with non-uniform mass eccentricity, the dynamic response of the second floor first decreased and then increased with eccentricity growth, while the dynamic response of the first and the third floor showed a contrary tendency, and the displacement of the top story was the maximal.