基于长短时记忆网络的结构地震响应预测

Structural seismic response prediction based on long short-term memory network

在地震作用下,为了给建筑结构的半主动、主动及智能控制系统提供持续稳定、精确实时的响应输入,提出一种基于长短时记忆网络(LSTM)深度学习框架的地震响应预测方法。将三种不同数据特点的地震加速度作用于钢梁有限元模型,采集响应数据库,对LSTM深度学习框架进行搭建、训练及参数优化,完成模型的数据测试,最后将该深度学习框架运用于某框架-剪力墙结构模型的顶层位移响应预测,并与试验数据进行对比。研究结果表明:在不同外部激励作用下,基于LSTM的地震响应预测策略具有较高的精确度和稳定性,可为控制系统预先提供准确的动力响应,从而有利于实现工程结构的在线实时减震控制。

In order to provide continuous,accurate and real-time response to the semi-active,active and intelligent control systems of building structures under earthquake action,a method of earthquake response prediction is put forward based on LSTM deep learning framework.Three kinds of seismic acceleration with different data characteristics are applied to the finite element model of steel beam,by collecting the response database,the LSTM deep learning framework is built and trained,and optimized parameters and the model data test are completed.Finally,the deep learning framework is applied to the top floor displacement response prediction of a frameshear wall structure model,and the results are compared with the experimental data.The results show that the LSTM seismic response prediction strategy has high accuracy and stability under different external excitations.It can provide accurate dynamic response for the control system in advance,which is beneficial to realize on-line real-time shock absorption control of engineering structures.