lessons learned from past notable disasters. taiwan part i: earthquakes

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LESSONS LEARNED FROM PAST NOTABLE DISASTERS. TAIWAN PART I: EARTHQUAKES . Walter Hays, Global Alliance for Disaster Reduction, Vienna, Virginia, USA . NATURAL HAZARDS THAT PLACE TAIWAN’S COMMUNITIES AT RISK . EARTHQUAKES. GOAL: DISASTER RESILIENCE. TYPHOONS . FLOODS. - PowerPoint PPT Presentation

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  • LESSONS LEARNED FROM PAST NOTABLE DISASTERS. TAIWAN PART I: EARTHQUAKES

    Walter Hays, Global Alliance for Disaster Reduction, Vienna, Virginia, USA

  • NATURAL HAZARDS THAT PLACE TAIWANS COMMUNITIES AT RISK

    EARTHQUAKES

    TYPHOONS FLOODSLANDSLIDES

    ENVIRONMENTAL DEGRADATION

    GLOBAL CLIMATE CHANGEENACT AND IMPLEMENT POLICIES HAVING HIGH BENEFIT/COST FOR COMMUNITY RESILIENCEGOAL: DISASTER RESILIENCE

  • EARTHQUAKESEARTHQUAKES OCCUR FREQUENTLY IN TAIWAN AS A RESULT OF COMPLEX INTERACTIONS OF THE PHILIPPINE AND EURASIAN PLATES

  • JI JI, TAIWAN EARTHQUAKE

  • OCCURRENCE

  • M 7.3Shallow depth (about 2 km)1:47 amSEPTEMBER 21, 1999

  • This earthquake was a subduction zone earthquake caused by interaction of the Philippine plate with the Eurasian plate.

  • THE CAUSATIVE FAULT

    The quake was generated by slip on the Chelongpu fault.

  • The regional compression caused thrust faulting. Over 60 km of surface faulting with lateral and vertical displacements reaching 9 m and 5 m, respectively, occurred in the center of the Island.

  • TAIWANSCOMMUNITIESDATA BASES AND INFORMATIONHAZARDS: GROUND SHAKING GROUND FAILURE SURFACE FAULTING TECTONIC DEFORMATION TSUNAMI RUN UP AFTERSHOCKS

  • INADEQUATE RESISTANCE TO HORIZONTAL GROUND SHAKINGEARTHQUAKESSOIL AMPLIFICATIONPERMANENT DISPLACEMENT (SURFACE FAULTING & GROUND FAILURE)IRREGULARITIES IN ELEVATION AND PLAN TSUNAMI WAVE RUNUP

    POOR DETAILING AND WEAK CONSTRUCTION MATERIALS FRAGILITY OF NON-STRUCTURAL ELEMENTSCAUSES OF DAMAGEDISASTER LABORATORIES

  • TOWARDS EARTHQUAKE DISASTER RESILIENCE

  • LESSONS LEARNED FOR DISASTER RESILIENCEALL NOTABLE EARTHQUAKESPREPAREDNESS PLANNING FOR THE INEVITABLE GROUND SHAKING IS ESSENTIAL FOR COMMUNITY RESILIENCE.

  • PHYSICAL EFFECTS: GROUND SHAKINGStrong motion records showed that ground shaking was characterized by long-period energy related to the magnitude and local site conditions. It was several times greater than the level prescribed in the building code.

  • LESSONS LEARNED FOR DISASTER RESILIENCEALL NOTABLE EARTHQUAKESPROTECTION OF BUILDINGS AND INFRASTRUCTURE IS ESSENTIAL FOR COMMUNITY RESILIENCE.

  • BUILDING IMPACTS 44,338 buildings collapsed, and an additional 41,336 houses and buildings were severely damaged. Twenty 10- to 20-story residential buildings either collapsed or experienced significant damage, suggesting frequency-dependent site amplification.

  • Strong ground shaking from the main shock and its large aftershocks caused the collapse of mid-rise buildings in Taipei, the capitol, which is located about 140 km north of the epicenter in a deep alluvial basin.

  • Strong ground shaking, ground failure, and surface fault rupture caused power outages and severe damage to lifelines.Some kinds of lifeline damage had NEVER been observed in previous earthquakes.

  • The loss of power had wide ranging effects, including disruption of Taiwans semi-conductor fabrication facilities.

  • A 30-km-long surface fault rupture caused major destruction to schools, residences, dams, embankments and bridges located in or near the rupture zone.

  • Most of the bridges that suffered significant damage were located in the area bounded by two thrust faults that ruptured the surface.

  • Liquefaction caused damage in a residential neighborhood of Yuanlin located in Changhua County. Extensive liquefaction-induced damage was also observed in parts of Taichung Harbor.

  • LESSONS LEARNED FOR DISASTER RESILIENCEALL NATURAL HAZARDSCAPACITY FOR INTELLIGENT EMERGENCY RESPONSE IS ESSENTIAL FOR COMMUNITY RESILIENCE.

  • LESSONS LEARNED FOR DISASTER RESILIENCEALL NATURAL HAZARDSCAPACITY FOR RECOVERY AND RECONSTRUCTION IS ESSENTIAL FOR COMMUNITY RESILIENCE.

  • IMPACTS The death toll reached 2,416. 11,446 were injured. Economic losses reached $9.2 billion. Short-term global stock market prices were influenced by impacts on the semi-conductor industry.

  • BASED ON REPORTS BY USGS, EERI, ASCE/TCLEE, MCEER, TAIWAN AGENCIES, AND OTHERS

    More lectures at Disasters Supercourse -http://www.pitt.edu/~super1/collections/collection52.htm*******************************

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