【作者】 刘军； 云斌； 赵长冰； 李堂堂；

【Author】 Liu Jun1,2,Yun Bin3,Zhao Changbing3,Li Tangtang2(1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098;2.Institute of Engineering Safety and Disaster Prevention,Hohai University,Nanjing 210098;3.Geotechnical Research Institute,Hohai University,Nanjing 210098)

【机构】 岩土力学与堤坝工程教育部重点实验室； 河海大学安全与防灾工程研究所； 河海大学岩土工程科学研究所；

【摘要】 环境激励下结构振动效应的预测对于工程的安全防护至关重要。提出了一个预测潜在环境激励下结构振动效应的理论模型与现场实测相结合的综合预测方法。沿着地震波的传播路径,可将预测方法分为两个阶段,从震源至结构地基,结构地基至结构内部。首先采用修正的Anderson模型预测结构地基振动效应;然后,预测结构对地基振动的响应。根据所需预测的结果分别采用三种方法:传递函数法、振型分解反应谱法与时程分析法。开发了预测模型的Fortran程序。通过现场实验对预测方法进行验证,结果表明:预测结果与实测结果吻合较好。更多还原

【Abstract】 It is very important to predict structure vibration induced by potential ambient excitation for protecting the structure safety.In this study,based on theoretical analysis and field measurement,a hybrid model to predict structure vibration is presented on the basis of site measurement and theoretical analysis.The model can be divided two phases according to the route of wave propagation,i.e.the first phase:from the excitation source to foundation of structure,the second one:from the foundation of structure to one location inside the structure.For the first phase,the modified Anderson method has been employed to predict the vibration of structure foundation.For the second phase,three methods,including transfer function method(TFM),mode-superposition response spectrum method(MSRSM)and time history analysis method(THAM),were used to predict the structure response to the motion of its foundation,respectively.The model has been completed in Fortran language.Moreover,the model has been verified in practical engineering.The results show that the predicted results closely approach the measured ones.更多还原