Featuring the proceedings of the Fourth International Conference on Earthquake Resistant Engineering Structures (ERES), this book presents research relating to the protection of the built environment in earthquake prone regions of the world. This involves not only finding ways of determining the optimal design and construction of new facilities, but also upgrading or rehabilitating existing structures. The papers included come from scientists working in industry as well as in academic and research institutes around the world and are classified within the following sections: Earthquake Resistant Design; Bridges; Seismic Behaviour and Vulnerability Analysis; Seismic Isolation and Control; Monitoring and Testing; Passive and Active Control; and Ground Conditions and Site Effects.