13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004 Paper No. 1910 NETWORKED PSEUDO-DYNAMIC TESTING PART I: DATABASE APPROACH Yuan-Sen YANG 1 , Kung-Juin WANG 2 , Shiang-Jung WANG 2 , Chuan-Wen HSU 3 , Keh-Chyuan TSAI 4 and Shang-Hsien HSIEH 5 SUMMARY This paper briefly presents the framework and testing result of an Internet-based platform named ISEE (Internet-based Simulation for Earthquake Engineering) for networked pseudo-dynamic simulation tests at multiple sites. This platform allows the integration of geographic-distributed structural laboratories with different facilities to become an integral part of a virtual laboratory system. It simplifies the complexity of multiple remote laboratories participating in Internet-based virtual laboratory testing and allows real-time data sharing through World-Wide Web (WWW). This paper focuses on one of the approaches in ISEE entitled Database Approach. The other approach, the Application Protocol Approach is introduced in Paper no. 1548 of the proceedings (Wang et al. [1]). The framework of the Database Approach mainly is composed of a Data Center, an Analysis Engine, and Facility Controllers. A series of networked pseudo- dynamic experiments are conducted and shows that the Database Approach is feasible for low-speed pseudo-dynamic simulation tests. The network and data processing time cost per step is about 0.2 seconds for networked domestic experiments and is about 2 seconds for transnational experiments. A 1000-time- step transnational experiment between Taiwan and US can be completed in one hour. INTRODUCTION As the complexity and scale of structural experiment increases and the increasing awareness of cost in today’s society, the existing large-size earthquake engineering laboratories gradually become incapable of satisfying the demand of various types of experiments. Besides endlessly increasing the capacity of each laboratory, it would be more cost effective for geographic-distributed earthquake engineering laboratories to collaboratively conduct one experiment through network. The concept of a networked laboratory environment is initiated to meet this demand. In the concept of networked laboratory, sub-components of a test structure can be tested at different laboratories through network. 1 Associate Research Fellow, National Center for Research on Earthquake Engineering, Taiwan. Email: ysyang@ncree.org.tw 2 Assistant Research Fellow, National Center for Research on Earthquake Engineering, Taiwan 3 Previous Graduate Student, National Taiwan University, Taiwan 4 Director, National Center for Research on Earthquake Engineering, Taiwan 5 Professor, National Taiwan University, Taiwan