可变荷载对结构模态分析评定影响的讨论

Discussion on Modal Analysis and Evaluation with the Influence of Variable Load

通过试验方法获得结构的动力特性,以进一步对结构的分析模型做出评定.为了评估建筑结构中可变荷载计入体系质量矩阵后对结构自振频率的影响,本文经理论分析以及应用结构分析软件进行建模分析两种方法,分析了建筑结构体系中折算活荷载计入体系质量矩阵前后结构较低阶固有频率的变化,认为对于设计时可变荷载较大的高层及超高层建筑主体,在完工初期进行结构的动力特性测试时若先考虑可变荷载对其自振频率的影响,再对结构进行整体评价,得出的结果将更加理想.

Obtaining dynamic characteristics of structure by experiment,which can make further evaluation of the structure models.In order to evaluate the effect of variable load of building structures when included in mass matrix,the essay use the way of theoretical analysis and structure analysis by software modeling can evaluate the change of natural frequency of the structure when take variable load into consideration,which two aspects indicated that the results of analysis and evaluation of the calculation models would be more ideal when we considered the influence of variable loads on natural frequency of the structures and then globally evaluate structures for high-rise buildings and ultra-tall buildings.