Building Type Roof Type Mitigation measure Building Location type by benbenzhou

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									                                   FLORIDA HURRICANE ALLIANCE
                                     QUARTERLY REPORT FORM


PROJECT TITLE: Hurricane Visualization
CONTRIBUTORS: J. Peter Kincaid, Glenn Martin and Dezhi Liao, University of Central Florida
PERFORMANCE PERIOD: April 1, 2005 through June 30, 2005


Percentage of Work Completed: 41%

Project Proceeding on Schedule: [x] Yes [ ] No

Cost Status:     [x ] Cost Unchanged            [ ] Under Budget                 [ ] Over Budget

Describe milestones achieved during this quarter: During this quarter we have concentrated on two tasks.

1. Subcontract to Kinetics Analysis Corporation (KAC) is in place with the goal to have useful tools by the end
of the 2005 hurricane season. The objective is to develop a web based platform (www.methaz.com) to display
innovative real time hurricane impact forecasts suitable for general audiences. The system being improved is
MEMPHIS. (Mapping for Emergency Management, Parallel Hazard Information System) .MEMPHIS is
operated by KAC for the Florida Division of Emergency Management to provide hazard data to county level
emergency managers. It is being improved through the research and development of broadcast quality graphics
and animations for distribution to both emergency managers and the general public. Graphics are being created
indicating the potential of damage impacts in easy to understand terms such as "probability of roof damage to
typical house", "probability of damage to mobile home", “probability of power outages", "probability of street
flooding", and so forth.

2. Design of the Hurricane Visualization Software Framework is progressing. Subtasks are listed and
described below.

    Generating Database for Depicting Hurricane Damage. HAZUS® gives us a building damage state
analysis for five types of residential structures: wood frame, masonry, concrete, steel and manufactured
homes. Other aspects of the database are shown in the table below.

           Building Type        Roof Type         Mitigation           Building          Damage State
                                                  measure              Location type
               wood frame         Hip               secondary            Open              Minor
                                                    water resistance
               masonry            Gable                                 Light              Moderate
                                                    enhance roof        Suburban,
               masonry            Flat                                                     Severe
                                                    deck
                                                                         Suburban,
               steel                                attachment                             Destruction
                                                                         Light trees
               manufactured                         strap for roof-
               homes                                wall connection      Trees
                                                     shutters


Illustrations of Visual Images Created for the Database. All buildings are developed in CreatorTM which
supports choice of viewing as well as attaching information tags to various parts of each image.
  One-story gable roof building.




Finished one-story hip roof building
    The finished Two-story gable roof building.




Two-story hip roof building about to be finished
        Evaluation of the Building Damage State. Extracting analysis result of HAZUS® is an important part of
this work. Following is a graph representative of a series in HAZUS which we will be directly applying to our
visualization software. It shows the probability of various degrees of damage (minor, moderate, severe,
destruction) as a function of wind speed. The HAZUS® software does provide some illustrations of building
damage (photographs), but we are collecting additional photographs, as well as videos, caused by hurricane
wind damage. This is described in more detail below.


            Hip Roof building with shutter-6d@6”/12” nail in open area (from HAZUS® program)




        Validity of Hurricane Visualization Data. This was an issue raised by the Sponsor and our conclusion
was that we should have reasonable success in grounding our visualizations in a combination of validated
models and real data. Our main goal is to visualize hurricane effects (mainly wind loads) on residential
buildings. The degree of physical modeling (and validation of models used) need not meet the same standards
as would be applied in (for example) developing building codes. In other words, the visualizations will show
what may happen under certain wind conditions and building characteristics, not that it will happen. What we
are developing is meant to be more of an educational tool than an analytical engineering tool. It is necessary,
however, that the visualization effects be consistent with observed effects of the range of hurricane winds on
houses.

HAZUS® gives us a reasonable estimate of the range of wind velocities which can cause damage to several
types of residential structures (e.g., wood frame, masonary, mobile homes). For example, according to Hazus®,
damage to wood frames houses starts at wind velocities of about 45 knots and is total at 150 knots. The program
provides only limited information about the type of damage or the pattern of damage. Two types of data are
useful to create our visualizations once we know the approximate degree of damage as a function of wind
velocity: (1) photos of houses damaged by high velocity winds, and (2) real data of the type that Forrest
Masters will soon be gathering with his “Wall of Wind”. One problem with photos is that the exact wind
velocity and conditions that caused damage to a particular house are almost never known, although we are able
to make estimates from weather radar and other sources. We do have a considerable number of photos and
some video of recent hurricanes which have impacted Florida (e.g., “Charlie” and “Andrew”, which we will use
for developing our visual effects of damage).

We will continue to gather and use photos. Also we will model buildings which Dr. Masters will test. We are
also open to other suggestions to improve the validity of the visual effects.
Other aspects of the visualization, such as rain and flooding which are not as critical to our particular project, are
part of the HAZUS® software (which we deem to have been validated) and we are developing visual
components which are compatible with the appropriate HAZUS® modules. One exception is our tree model
which will show blowing and fallen trees; we will simply estimate wind velocities which will cause a tree of a
particular type to fall.

								
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