Development Of A Remotely Collaborative Pseudo-dynamic Testing Platform For Bridge Structures Considering Soil-structure Interaction

As the pivotal project of traffic line, the performance of bridge under earthquakeexcitations plays a more and more important role in seismic disaster preventionsystem. So with extensive researches developed, the earthquake resistant behavior ofbridges has caused much concern of scholars in recent years. With the development ofremotely collaborative experiments, an effective method is provided for us to studythe performance of long-span and large-scale structures under earthquake excitationsby testing. Studies have shown that the soil-structure dynamic interaction has acertain influence on seismic response of the bridges. A remotely collaborativepseudo-dynamic test platform for bridge structures considering soil-structureinteraction is developed in this thesis.Taking bridge structure as research object, the key contributions presented in thisthesis are listed below.(1)The necessity of the research on the soil-structure interaction and the commonmodel of the pile-soil-structure are introduced. Based on the concept of remotelycollaborative test, the basic structure, data model, communication protocol, anddevelopment principles of procedure of the networked structural laboratory areintroduced.(2)Elastic-plastic time history analysis program of bridge structures is developed.Considering soil-structure interaction, the calculation model of bridge structures isanalysed. The seismic response of a three-span beam bridge is simulated by thisprogram, and the results agree well to that calculated by SAP2000program, whichverifies the rationality of the pile-soil interaction model. It provides a finiteelementanalysis basis for remotely pseudo-dynamic testing platform. The necessity ofconsidering soil-structure interaction is demonstrated by comparison of the timehistory analysis results with and without considering soil-structure interaction.(3)A remotely collaborative pseudo-dynamic testing platform for bridgestructures is developed. The testing method of remotely pseudo-dynamic testing isbuilt. Taking a three-span beam bridge as example, the division of substructures, thestiffness matrix formation of substructures, and the boundary conditions are discussed.A series of geographically distributed virtual tests are conducted, and theeffectiveness of the platform is verified by comparing the results of geographically distributed virtual tests with the results of elastic-plastic time history analysis.