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Structural Safety Control

Recent large earthquakes, such as the 2011 Tohoku earthquake and the 1995 Kobe earthquake, has shown us the importance of research on seismic safety of buildings and earthquake disaster mitigation of urban space. The members of our lab devote themselves to pursue state of the art studies in wide variety of fields in order to improve seismic safety of buildings and build infrastructures invulnerable to natural disasters.

Academic Staff

Tomoaki NISHINO

Associate Professor (Disaster Prevention Research Institute)nishino

Research Topics

  1. Prediction of earthquake-induced fires and loss reduction
  2. Prediction of tsunami-induced fires and loss reduction
  3. Evaluation of evacuation safety in building fires

Contacts

Room E332D, Bldg. East Main Bldg., Uji Campus
TEL: +81-774-38-4047
FAX: +81-774-38-4055
E-mail: nishino.tomoaki.3c@kyoto-u.ac.jp

Research Topics

Studies on Seismic Safety of Buildings

Develop a new efficient but low-cost seismic reinforcement system and evaluate its seismic performance by shaking table tests and dynamic response analysis. Upon utilizing the system to existing houses, microtremor observations are made to measure and verify the effectiveness of the reinforcement.

Reveal the effects to the upper structures of base-isolated buildings that are colliding with the retaining walls based on shaking table tests and response analysis.

Understand the dynamic characteristics of existing buildings from observed seismic motions and seek the measure for improving its seismic safety. Also, develop a technology to evaluate the seismic resistance of existing buildings from observed microtremors.

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Experiment to verify the effect of seismic reinforcement for ordinary wooden houses

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Experiment of base-isolated building colliding with the retaining wall

Studies on Strong Ground Motions by Earthquakes and Subsequent Responses of Buildings

Reveal the cause of the generation of high frequency acceleration observed during the Off the Pacific Coast of Tohoku earthquake of 2011 by analyzing the effects of source, path and site.

Develop a technology to detect the detailed subsurface structure precisely by analyzing the strong motion and microtremor data and use them to predict strong motions precisely for future great earthquakes.

Predict long period ground motions from future great earthquakes and reveal their impactss to large-scale buildings using the newly installed long-period shaking table.

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Estimated seismic intensity distribution for the Tonankai earthquake

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Result of identifying the subsurface structure by fitting the Horizontal-to-Vertical spectral ratio of observed seismic ground motions with theory

Studies on Optimization of Seismic Design Considering the Time Variation of Seismic Risk

Evaluate the risk of seismic damage to urban spaces and its social and economic impacts for the selected target  regions considering the time variation of seismic risk and propose a way to optimize the level of ground motion or equivalent earthquake load for the seismic design code.

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Estimated seismic intensity distribution for the Tonankai earthquake

Development of computational models for earthquake-induced urban fires considering firefighters’ activities

Multiple fires have broken out in urban areas simultaneously after major earthquakes and have developed to spreading fires by overwhelming firefighter’s activities. In windy conditions, wind-blown fire plumes have affected evacuation behavior in the downwind direction and have caused burn injuries of respiratory organs of evacuees. In addition, spot fires due to firebrands have made firefighter’s activities more difficult.
We are developing computational models for urban fire spread after earthquakes considering firefighters’ activities in order to estimate human damage and evaluate the effectiveness of firefighting plan.

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Continuous simulation of building structural damage and urban fire spread following earthquake.

Development of computational models for tsunami-induced fires and evaluation of the impact on urban environment

A number of fires occurred in tsunami inundation areas after the 2011 Tohoku Earthquake and Tsunami, and some of the fires developed to large-scale spreading fires. In particular, tsunami refuge buildings were damaged by such tsunami-induced fires, and people who had evacuated to the buildings from the tsunami were exposed to the fires. This fact has impressed people with the risk from fires in evacuating from future tsunamis. Nevertheless, safety measures against the tsunami-induced fires have not been sufficiently considered because simulation methods for tsunami-induced fires have not been proposed differently from earthquake-induced fires that conventionally have been of serious concern in Japan.
We are developing computational models for tsunami-induced fires in order to evaluate the impact on urban environment and help reasonable planning of safety measures.

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Simulation of tsunami-induced oil spill fires and prediction of fire damage of tsunami refuge buildings.