Development And Application Of Aseismic Design Software Based On Reaction Displacement Method

With the large-scale construction of urban rail transit,the seismic design of underground structure has become a focus for engineers and researchers.In recent years,a series of specifications related to the seismic design have been promulgated in China.However,seismic design methods in specifications is rather difficult to apply in practice for engineers.Therefore,it is of great practical value to develop an aseismatic design software of underground structure with friendly interface and simple operation.The main work and research results of this paper are as follows:(1)The substructure method is used to deduce the reaction displacement method,and it is proved that the seismic calculation method of the reaction displacement is reasonable and on the theoretical basis.(2)Summing up relevant seismic specifications,there are mainly two reaction displacement methods represented by “seismic design specification of buildings” and by "seismic design specification of city rail transit".Then,combined with the current research of scholars,reaction displacement methods are discussed comprehensively and deeply.(3)Based on the calculation process of reaction displacement method,the framework of software is built.With Visual Basic as the development tool,by means of the bar finite element method,the computing function of reaction displacement method is realized.Meanwhile,for perfection of the software,aided design modules are added.Finally,the whole seismic design software of reaction displacement method is compiled successfully.(4)By caculating different buried depths and seismic grades,the reliability of USSAP is verified by comparing with the commercial software ANSYS,and relevant laws about reaction displacement method is obtained.(5)By summarizing the methods of getting coefficient of subgrade reaction,different methods were analyzed by application of USSAP.The conclusion is that the test method should be a selection priority as getting coefficient of subgrade reaction.In the absence of geological exploration data,empirical method and numerical method can be used as an alternative.