Development of Online Hybrid Testing: Theory and Applications to Structural Engineering provides comprehensive treatments of several topics pertinent to substructure online hybrid tests. Emphasis has been placed on explaining the three frameworks: the host-station framework, separated model framework and peer to peer framework These have been developed within the Internet environment and are particularly suitable for distributed hybrid testing. In order to help readers to understand the essence of online hybrid testing and further to build up their own systems, an engineering practice has been introduced at the end of this book with the source code appended. Development of Online Hybrid Testing: Theory and Applications to Structural Engineering is primarily written for readers with some background in structural dynamics, finite elements, and computer science. Material that has previously only appeared in journal articles has been consolidated and simplified which provides the reader with a perspective of the state-of-the-art.