结构动力模型相似关系研究及验证

结构模型的振动台试验是研究工程结构抗震性能的重要方法,正确处理模型与原型的相似关系以及由模型反应正确推导原型反应是很重要的问题。本文以4层框架结构为例,探讨了原型与人工质量模型和欠质量人工质量模型的相似关系,采用有限元分析程序计算原型与模型的地震反应,由模型地震反应反推原型地震反应,将原型地震反应的计算值和反推值从基本自振周期,加速度,速度,位移,基底剪力方面进行了比较,从而得出在弹性阶段内动力相似关系的正确性。

Research of similitude laws for dynamic structural model test

Vibroplatform test is an important method to study seismic performance of engineering structure.Processing the similarity relation and deducing response of original mold correctly are very important.Taking one four-story frame building as an example,this paperdiscussed the similarity relation of the original model and enough artificial mass and without enough artificial mass,and earthquake response of the original model and model were calculated by using finite element programe;response of original model according to response of the model was deduced;the calculation result from basic natural vibration period,acceleration,velocity,displacement and structural base shear were compared.Finally,the correctness of dynamic similitude law at the elastic stag was validated.