ISEE: Internet-Based Simulations for Earthquake Engineering Part I: The Database Approach (original) (raw)
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Isee: A Platform for Collaborative Experiments for Earthquake Engineering
As the scale and complexity of a modern structural experiment increase, existing laboratories are facing increasing difficulties to satisfy demands of various types of experiments, such as multi-span bridge experiments, soil/pipeline/structure interaction experiments, or real-time dynamic hybrid testing using both shake table and reaction walls. To address this issue, some research efforts have been conducted on developing technologies for collaborative experiments, allowing two or more laboratories at different geographical locations to jointly conduct a test in a collaborative manner. This paper presents a prototype of an Internet-based environment for collaborative networked experiments among geographically distributed structural laboratories, called ISEE (Internet-based Simulation for Earthquake Engineering). Two approaches, the Database Approach and the Application Protocol Approach, have been employed to provide different solutions for network communication as well as collaborative framework in ISEE. This paper presents the ISEE environment for collaborative networked structural experiments among geographically distributed structural laboratories. Several networked pseudo dynamic tests have been conducted to investigate the feasibility and efficiency of ISEE. Based on these test results, the feasibility of ISEE for collaborative networked tests is confirmed. Networked pseudo-dynamic test examples, including domestic and transnational ones, demonstrate that both Approaches are feasible for low-speed pseudo-dynamic experiments in terms of the data correctness and transmission time.
ISEE: A Platform for Internet-Based Simulation for Earthquake Engineering
The building and bridge damages induced by Chi-Chi earthquake lift the attention on engineering technologies for improving earthquake resisting performance of existing or new structures. New researches on these advanced technologies raise the needs of versatile and large-scale experimental environments and technologies. The integration of research resources and experimental facilities and collaborations among different laboratories has become an important issue. This paper presents an ongoing research work developing an Internet-based environment, called ISEE (Internet-based Simulations for Earthquake Engineering), for collaborative networked structural experiments among geographically distributed structural laboratories. Two approaches, the Database Approach and the Application Protocol Approach, have been employed to provide different solutions for network communication as well as collaborative framework in ISEE. This paper presents the ISEE environment for collaborative networked structural experiments among geographically distributed structural laboratories. Several networked pseudo dynamic tests have been conducted to investigate the feasibility and efficiency of ISEE. Based on these test results, the feasibility of ISEE for collaborative networked tests is confirmed. A series of networked pseudo-dynamic test examples using the Database Approach shows that the network and data processing costs about 0.2 seconds and 2 seconds per time step, around 20% and 70% of total elapsed time in domestic and transnational experiments, respectively, which is feasible for most of the low-speed pseudo-dynamic experiments.
ISEE: Internet-based Simulation for Earthquake Engineering Part I: The Database Approach
2003
Network technique begins to apply on earthquake engineering experiments to satisfy the potential demands on future structural experiments. An Internet-based environment, named ISEE (Internet-based Simulation for Earthquake Engineering) is being developed for collaborative networked pseudo-dynamic experiments among geographically distributed laboratories. Two approaches, namely, the Database Approach and the Application Protocol Approach, are prototyped to provide different solutions for network communication as well as collaborative framework in the ISEE. This paper is the first part of a two-part paper, which introduces the Database Approach in ISEE employing a database for experimental data exchange and repository, a web service for experiment setup and data sharing, Facility Controllers with tele-operation capability, an OpenSees-based Analysis Engine performing pseudo-dynamic analyses, and a real-time video system capturing and sharing the real-time video images through Internet...
ISEE: Internet-based Simulation for Earthquake Engineering—Part I: Database approach
Earthquake Engineering & Structural Dynamics, 2007
An Internet-based framework, named Internet-based Simulation for Earthquake Engineering (ISEE) was developed to facilitate collaborative earthquake engineering experiments performed by multiple laboratories in a network environment. One of the approaches in the ISEE framework, named Database Approach, offers an easy way to perform multi-site networked collaborative pseudo-dynamic experiments. The Database Approach uses the Structured Query Language (SQL), a common and standardized computer language used in database management systems, for inter-laboratory communications. Using the SQL protocol, it is easy to monitor the experiments' progress, access the data, as well as develop additional programs to expand the functions for a networked experiment. This approach offers consistency and durability of selected experimental data both during and after experiments. Two networked pseudo-dynamic experiments were conducted to demonstrate the feasibility and expansibility of the Database Approach in ISEE.
Earthquake Engineering & Structural Dynamics, 2007
A project, Internet-based Simulation for Earthquake Engineering (ISEE), had been launched in National Center for Research on Earthquake Engineering (NCREE) to develop techniques of networked collaborative structural experiments. This paper gives description to a Platform for Networked Structural Experiments (PNSE) as one of the two approaches under the ISEE project. Via the Internet, PNSE links a numerical simulation program and a number of facility control programs geographically scattered around the world by point-to-point TCP connections to collaboratively conduct a single experiment. An application protocol, the Networked Structural Experiment Protocol (NSEP) defining relevant events and activities in real laboratories, as well as communication rules between the client and server, was proposed to work with the PNSE. Results of transnational numerical simulation and real experiments are presented to prove the validness and the efficiency of PNSE.
Networked pseudo-dynamic testing part I: database approach
2004
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. ). The framework of the Database Approach mainly is composed of a Data Center, an Analysis Engine, and Facility Controllers. A series of networked pseudodynamic 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-timestep transnational experiment between Taiwan and US can be completed in one hour.
A virtualized laboratory for earthquake engineering education
Computer Applications in Engineering Education, 2007
Physical laboratory-based experiments have been established as a fundamental learning tool in many areas of science and engineering education. They have particularly enriched engineering education by supporting different learning styles. However, the type of physical experiments is generally governed by the available infrastructure and resources, frequently limiting the exposure to valuable educational material to a relatively small audience. With the creation of ''Virtualized Laboratories'' this problem can be addressed in the form of realistic, multi-dimensional digital records, capturing the essential characteristics of a physical experiment. To this end, in this paper we present a virtualized laboratory for earthquake engineering education that utilizes virtual reality technology to capture and disseminate the results of shake table experiments.
India has been facing earthquake problems from many centuries which need no introduction. From recent earthquakes, it is very well understood that lack of awareness is one of the major factor for huge casualty losses. While still having the probability of occurrences of earthquakes in India, it becomes very important and need to increase the awareness about the effects of earthquakes among growing professionals involved in construction by making them understanding the concepts of Structural Dynamics and Earthquake Engineering. This paper will detail the use of virtual laboratory in real time environment of structural dynamics. Virtual Laboratory provides a new methodology to convey and learn concepts using the power of visualization of ideas and computations. Virtual labs rely on an active engagement of the learner in the knowledge acquisition process. This paper is aimed at promoting the new methodology and providing a glimpse into the exciting world of interactive and experimentation of structural dynamic concepts with no limitation of conductance. Using this tool, a person with little knowledge of structural engineering can enhance his fundamentals of structural dynamics. For better understanding experiments are explained with graphical diagrams seen in GUI with the support of JAVA 3D. Apart from basic understanding of dynamic behavior of structure, this tool kit also helps architects and young civil engineers in understanding the principles of structural dynamics.
2004
Earthquake engineers have traditionally investigated the behavior of structures with either computational simulations or physical experiments. Recently, a new hybrid approach has been proposed that allows tests to be decomposed into independent substructures that can be located at different test facilities, tested separately, and integrated via a computational simulation. We describe a grid-based architecture for performing such novel distributed hybrid computational/physical experiments. We discuss the requirements that underlie this extremely challenging application of grid technologies, describe our architecture and implementation, and discuss our experiences with the application of this architecture within an unprecedented earthquake engineering test that coupled large-scale physical experiments in Illinois and Colorado with a computational simulation. Our results point to the remarkable impacts that grid technologies can have on the practice of engineering, and also contribute to our understanding of how to build and deploy effective grid applications.