生态复合墙结构动力反应分析模型研究

Dynamic response analysis model for an ecological compound wall structure

独特构造及多种材料的使用与嵌套,使生态复合墙结构的动力特性计算异常复杂,故需提出其简化动力计算模型。结合课题组前期研究成果及相关理论,提出生态复合墙结构在弹性阶段简化的动力反应分析模型;建立每层复合墙体分布参数体系的运动偏微分方程,计算其振型和频率;把每层顶点位移作为上一层支座激励,利用振型叠加法对每层复合墙体进行有阻尼动力反应分析;对整体复合墙体进行动力反应分析,并与前期振动台试验结果进行对比分析。理论与试验结果表明:该简化模型计算求得的各层加速度时程反应值与试验值吻合较好,具有一定的计算精度与实用性,为生态复合墙结构在弹性阶段的动力反应分析提供了一种较为简化、实用的计算方法。

An ecological compound wall structure is a unique structure composed of many kinds of materials. It is complicated to calculate the dynamic performance of the structure so a simplified dynamic calculation model is required Based on the previous study and the relevant theories, a simplified model for dynamic response analysis of an ecological composite wall structure in elastic stage. The partial differential equations for the distributed parameter systems of each floor of the wall were derived to calculate their modes and frequencies. In addition, the displacements of the top of each floor were taken as the support excitation of the above floor, and the vibration shape superposition method was adopted to analyze the damping dynamic response of each floor of the wall. The dynamic response analysis of the whole wall was conducted and the results were compared with the preliminary shake table test ones. Theoretic and experimental results showed that the frequency of the 1st mode and the＇ acceleration response curves of each floor agrees well with the experimental data, so the model has certain calculation precision and practicability, it provides a better simplified and practical calculation method for dynamic response of an ecological compound wall structure in elastic stage.