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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 84
Edited by: B.H.V. Topping, G. Montero and R. Montenegro
Paper 125

System Integrated Simulation for an Urban-Scale Earthquake Hazard

M. Hassanien Serror1, J. Inoue2, M. Hori3 and Y. Fujino1

1Department of Civil Engineering
2Department of Material Engineering
3Earthquake Research Institute
The University of Tokyo, Japan

Full Bibliographic Reference for this paper
M. Hassanien Serror, J. Inoue, M. Hori, Y. Fujino, "System Integrated Simulation for an Urban-Scale Earthquake Hazard", in B.H.V. Topping, G. Montero, R. Montenegro, (Editors), "Proceedings of the Fifth International Conference on Engineering Computational Technology", Civil-Comp Press, Stirlingshire, UK, Paper 125, 2006. doi:10.4203/ccp.84.125
Keywords: integrated simulation, urban system, urban-scale hazard, object-based software environment, environment architecture, scalability.

A predictive integrated simulation system is now a pressing worldwide issue in the simulation of complex urban systems, ranging from a district to a metropolis, under the risk of urban-scale hazards: earthquakes, tsunamis, blasts, etc. The informal, dynamic, and evolving characteristics of the urban interdisciplinary simulation creates many challenges for the disconnected top-down simulation system. Key barriers include [1]: heterogeneity, interoperability, and accessibility to models or expertise; system complexity, size, and rapid or spontaneous changes; and the sharing of proprietary knowledge embodied in subsystem models. It is understood that individual participants perform their simulation services in separate environments, bartering service exchange relationships to obtain what they need to resolve their part of the problem.

The goal of this work is to facilitate the integrated simulation for the urban system that can rapidly predict its integrated performance under the risk of urban-scale hazards. This in turn makes it possible to make tradeoffs between different sustainable urban development-regeneration proposals. In addition, it empowers disaster preparedness and mitigation planning for the on-time scenario.

The authors envisage a distributed simulation service software environment running in parallel with the activities of simulation participants. A distributed object-based infrastructure has been developed to enable this vision. A prototype has been implementation, called DOSE (Distributed Object-based Software Environment). There are many examples of research effort to develop distributed systems for collaborative engineering [2,3,4]. This paper is also founded on a vision for distributed collaborative simulation [5,6,7,8].

In this paper, the underlying environment infrastructure has been introduced in addition to an example application for earthquake hazard that is applied to Bunkyo city, Japan, with a domain size of ( [m]). The DOSE environment has allowed third party application services of heterogeneous simulations, using different models, and different tools to be integrated. The object-based environment architecture has enabled relationships among environment objects to propagate changes such that an explicit overall system representation is not required, but rather urban system simulation emerges from the distributed service exchange network. In addition, environment scalability has been addressed to draw an inspiration for the feasibility of developing different tradeoffs of sustainable urban development and regeneration and disaster preparedness and mitigation by changing the values of simulation variables.

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