Development of Online Hybrid Testing via Internet and Applications for Simulation of Earthquake Responses of Structures Using Laboratory Networks

Synopsis Presented herein is a substructure online hybrid test system that is extensible for geographically distributed tests. In this system, a set of devices conventionally used for cyclic tests is adopted to load the tested substructures to the target displacement or the target force. Multiple tested substructures and numerical substructures using various structural program codes can be accommodated within the single framework, simply interfaced with the boundary displacements and forces. A coordinator program is developed to keep the boundaries among all substructures compatible and equilibrated. An Internet-based data exchange scheme is also devised to transfer data among computers equipped with different software environments. A series of online hybrid tests are introduced, and the portability, flexibility, and extensibility of the proposed online hybrid test system are demonstrated.

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