Development Of A Remotely Collaborative Pseudo-dynamic Testing Platform For Bridge Structures Considering Group Of Pile Foundation

With the development of remotely collaborative pseudo-dynamic test, aneffective method is provided for us to study the performance of long span and largescale structures under earthquake excitations by testing. It enables the shared use oftesting resources by integrating single structural laboratories into a powerful andnetworked laboratory with advanced capability. In this thesis, on the basis of theprevious studies, the remote pseudo dynamic test platform for bridge structure isupdated, in which the group pile-soil-structure interaction is considered and pilefoundation is separated out as a substructure to study its seismic performance.1. The necessity, significance and widely used analysis models of grouppile-soil-structure interaction is introduced. This thesis introduces the basic structure,data model, communication protocol and development principle of networkedstructural laboratory NetSLab developed by Hunan university.2. Based on analyzing calculation model of bridge structure, an elastic-plastictime history analysis program of bridge structure is developed, and grouppile-soil-structure interaction is considered. Taking a three-span beam bridge asexample, the reliability and accuracy of the program and the rationality of the grouppile-soil-structure interaction model are verified by comparing the results calculatedwith the program and SAP2000,which provides a theoretical basis for thedevelopment of remotely collaborative sub-structure pseudo-dynamic testing platform.The importance of considering group pile-soil-structure interaction is confirmed bycomparing the time history analysis results with and without group pile-soil-structureinteraction model and the equivalent single pile model.3. Based on the communication platform of NetSLab, a remotely collaborativepseudo-dynamic test platform of bridge structure is developed. The remotelycollaborative sub-structure pseudo-dynamic testing method is established based on theconcept of traditional sub-structure pseudo-dynamic test. Taking a three-span beambridge as example, pier, bearing and pile foundation are selected as substructures, thestiffness matrix formation of calculation substructures and test substructures arederived, and the boundary conditions are discussed. A series of geographicallydistributed virtual tests are conducted, and the effectiveness of the platform is verifiedby comparing the results of geographically distributed virtual tests with the results of elastic-plastic time history analysis.4. The further improvement and application of the testing platform is discussed,as well as future research work of remotely hybrid testing method.