Development Of A Remotely Collaborative Pseudo-Dynamic Testing Platform For Bridge Structures Based On NetSlab

With extensive research developed, scholars have paid high attention to the earthquakeresistant behaviour of bridges, which are the pivotal project of traffic line. Remotelycollaborative pseudo-dynamic tests, which could realize the shared use of testing resourcesand improve the comprehensive test capability by combining sub-structure technique withInternet technology to integrate single structural laboratories, play an important role onhandling seismic test of long-span and large-scale bridge. Based on previous research, thisthesis puts emphasis on applying the remotely collaborative pseudo-dynamic test to bridgestructure, intensively investigated aspects such as remote network communication, dynamicmodels of structure, rational division of substructure, numerical method and so on.1. Based on the point of remotely collaborative test, the basic structure, data model,communication protocol, and development principles of procedure of the networked structurallaboratory are introduced. According to the present situation of network, two communicationframeworks for NetSLab passing through firewall are illustrated.2. Elastic-plastic time history analysis program of bridge structure is developed. Thecalculation model of bridge structure is analysed, including vibration analysis model,calculation model of plastic hinge, mechanical properties of bearing, and interactionsimulation of pile and soil. The stiffness equation of elastic-plastic beam element anddynamic stiffness of the pile foundation are deduced. The formation of dynamic coefficientmatrix (lumped mass matrix, stiffness matrix, orthogonal damping matrix) is discussed.Taking a three-span and a four-span beam bridges as examples, it confirms the rationality ofthe theoretical hypothesis and analytical method by comparing the result of program with thecalculation of SAP2000. And a theoretical basis is provided for the development of remotelycollaborative sub-structure pseudo-dynamic testing platform.3. Remotely collaborative pseudo-dynamic test platform of bridge structure based onNetSLab is developed. Based on the concept of traditional sub-structure pseudo-dynamic test,the remotely collaborative sub-structure pseudo-dynamic testing method is put forward.Taking a three-span beam bridge as example, the division of substructures, the stiffnessmatrix formation of substructures, and the boundary conditions are discussed. A series of thegeographically distributed virtual tests are conducted, and the effectiveness of the platform isverified by comparing the results of geographically distributed virtual tests with the results ofelastic-plastic time history analysis. 4、The further development and application of the remotely collaborative pseudo-dynamic testing platform are discussed with the carrying out of remotely collaborative test.And the further research works of remote test is put forward.