| PaperNO | Paper / Abstract |
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H0-014
10:50
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11:05
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Evaluation of Seismic Resistant Capacity of Exposures by Mesh-Based Scenario Simulation for Disaster Reduction Planning
The seismic resistant capacity subjected to large-scale earthquakes under current environment conditions in metropolitan cities should be evaluated for disaster management. To assess the seismic resistant capacity of exposures, we developed a mesh-based scenario simulation tool, Taiwan Earthquake Impact Research and Information Application Platform (TERIA), based on variety of inventory database collected from government agencies. TERIA is capable of analyzing the ground motion, soil liquefaction, casualty, damage of buildings, roads, bridges, portable water system, power supply system and interpreting disaster scenarios in 500 m x 500 m mesh on interactive interfaces. We present analytical results in terms of major theme maps for disaster mitigation planning, including emergency rescue, medical care, sheltering, and government operation. Our research accomplishment has been applied on formulation of disaster countermeasures, policy suggestions, and national earthquake drills for government. The quantitative impact analysis by scenario simulation in details could be helpful to elaborate a more thorough mitigation planning for enhancing the disaster resilience against future major earthquakes.
Bing-Ru Wu, Siao-Syun Ke, Sheu-Yien Liu, Carol C. Wu
disaster reduction planning, earthquake, impact assessment, scenario simulation
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H0-011
11:05
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11:20
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TIME-DEPENDENT COMPUTATION OF MULTISCALE INTERDEPENDENCIES BETWEEN LIFELINE SYSTEMS SUBJECTED TO SEISMIC EVENTS
There is broad consensus that the interdependencies that arise between the various infrastructure systems of society must be accounted for in order to accurately gage community resilience. However, most existing studies have focused on only a single spatial or temporal level, for example a single phase of a disaster or a specific geographic area. A distributed computational framework is proposed to address this shortcoming. The platform integrates simulators with multiple spatial and temporal scales to conduct a time-dependent analysis of the different phases of a hazard and the subsequent recovery process. The simulators are independent of one another and interact together through a publish-subscribe pattern for data management. A case study that involves two subsequent seismic shocks affecting a community with several interdependent lifeline systems is presented to showcase the capabilities of the proposed platform. The results show that functionality loss and recovery time are underestimated if the interdependencies between lifeline systems are not properly considered. It is also shown that time-varying resource allocation strategies, which adjust according to actual restoration situations, have a better effect on resilience than strategies that do not.
Szu-Yun Lin, Sherif El-Tawil
distributed simulation, earthquake, interdependency, lifeline systems, resilience
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H0-012
11:20
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11:35
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An method for seismic impact evaluation of lifelines facilities considers cascading effects
Lifeline infrastructure are an essential role in the operation of the urban. Once these systems are damaged by an earthquake, the urban function decreases seriously and the livelihoods, economic, and security will be impacted. Also, the lifelines infrastructure is the aggregation of many facilities that constitute the network systems. Consequently, the failure of the facility in a single system could potentially affect the functioning of not only its own system but also the other systems which are dependent on it, this leads to cascading effects. The power systems are the important facilities for ensuring operation a top task after the disaster. This study considered the seismic impact and cascading effects to develop the model for seismic impact assessment of lifelines infrastructure during the scenario earthquake, the result of this study assistant the authority to make an intelligent decision for lifeline infrastructure disaster or resource management.
Chih-Hao Hsu, Min-Cheng Teng
Cascading effects, lifelines facilities, seismic impact evaluation
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H3-012
11:35
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11:50
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Development and Applications of Seismic Disaster Simulation Technology
After Chi-Chi, Taiwan earthquake in 1999, the seismic disaster simulation technology (SDST) received more and more attention. The Taiwan Earthquake Loss Estimation System (TELES) was developed and updated continuously since then by the National Center for Research on Earthquake Engineering. This paper intends to introduce the SDST and to review several applications based on it, including the early seismic loss estimation and the probabilistic seismic risk assessment.
Chin-Hsun Yeh
early seismic loss estimation, probabilistic seismic risk assessment, scenario earthquake, seismic disaster simulation technology
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H0-015
11:50
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12:05
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SEISMIC PERFORMANCE OF WATER SUPPLY SYSTEMS — FROM EARTHQUAKE EXPERIENCES TO RECENT RISK ASSESSMENT WORK IN TAIWAN
Taiwan has been struck by numerous earthquakes in the past two decades, among which the 1999 Chi-Chi earthquake (ML7.3) was the most deadly and devastating in history. Widespread disruption of water supply occurred in central Taiwan and last for more than one month due to severe damages in water systems in this event. The less devastating 2016 Meinong Kaohsiung earthquake (ML6.6) and 2018 Hualien earthquake (ML6.2) also caused substantial damages in water systems in the affected areas, respectively. In order to mitigate the water supply systems against earthquake hazards, NCREE has been collaborating with the authorities and utilities in Taiwan for years to investigate the seismic risk of water supply systems for better decision making. In this paper, the observed damages and the lessons learnt from these earthquakes are summarized. The development and methodologies of software Twater are introduced. It is capable of simulating the damage of pipelines and facilities of a water system, the reduction in their functionality, and the water outage, given an earthquake scenario. It employs the inventory and hierarchy of raw water aqueducts, water treatment plants, major clear water conveyance trunks, and clear water transmission and distribution pipeline networks in the service areas of a water system. Recently, Twater has been employed to analyze the water systems in Kaohsiung. According to the simulation results, the weaknesses of a water system can be identified for seismic upgrade.
Gee-Yu Liu, Chin-Hsun Yeh
water supply system, seismic risk assessment
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H0-018
12:05
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12:20
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DAMAGING DATA SPECTRUM FRAGILITY CURVES DEVELOPMENT AND SCENARIO BASED LOSS ESTIMATION
The fragility curves in Taiwan were previously developed based on the value mainly in PGA. NCREE (2003) develop the PGA fragility curve based on shaking table experiment and used it on Taiwan Earthquake Loss Estimation System (TELES) for seismic risk estimation. In the knowledge finding on the relation of hazard to damage as to be risk related, PGA is now suggested might not be the only acritical parameter for this estimation. Our previous work established the seven building types fragility curves based on the building damage records collected from the 1999 Chi-Chi and 2016 Meinong earthquakes and consider both PGA and PGV as the strong motion parameters. We intend to develop building fragility curves for the acceleration response spectrum (Sa) and velocity response spectrum (Sv) and explore the comparison of the fragility curve between PGA/PGV and Sa/Sv. In this study we built the acceleration response spectrum (Sa) and velocity response spectrum (Sv) fragility curve in different interval of period based on 1999 Chi-Chi and 2016 Meinong earthquakes in Taiwan. Although with different building types between Taiwan and Japan, we gave qualitative comparison of our developed fragility curves with Japanese data and curves to seek for the better representative parameters for Taiwan. This is also important to the presentation of next PSHA (Probability of Seismic Hazard Analysis), which is now mainly considered in a form of PGA, for more practical exercise for hazard to risk assessment. We further explore the scenario based loss estimation using our developed fragility curve according to the Shanchiao fault earthquake simulation case as an example, and compare the loss between different types of fragility curve. This task could be a development for a scenario based earthquake event for seismic risk assessment.
Kuo-Fong Ma, Ming-Kai Hsu
fragility curve, loss estimation, seismic risk
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