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.
Pages to are hidden for
"Building Type Roof Type Mitigation measure Building Location type"Please download to view full document