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HR_DAD_1.1 - DAD Software for High-Rise Buildings

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HR_DAD_1.1 - MATLAB-based Database-Assisted Design (DAD) for flexible buildings This is the download page for HR_DAD_1.1, a MATLAB-based Database-Assisted Design (DAD) software package for flexible buildings.

HR_DAD_1.1 calculates wind effects and estimates their mean recurrence intervals (MRIs) for both structural members and global response parameters such as inter-story drift and top floor acceleration. The software, which incorporates a user-friendly graphical interface, uses model scale time histories of the floor loads acting at the centers of mass of each floor measured in the wind tunnel in conjunction with the following information obtained separately from a structural model of the building:

  1. Modal period values
  2. Modal damping values
  3. Modal shapes
  4. Dynamic influence coefficients
  5. Structural member properties
  6. Static load reactions
Information about these and other required inputs are described within the pages of the software or within the accompanying report (downloaded below).
Required Input as MATLAB Files The HR_DAD_1.1 software provides the ability to load required input information. All loaded information (e.g., items 3-6 above) must be stored in MATLAB format, i.e., saved previously as a data file within MATLAB. The directional extreme wind speed data (e.g., simulated hurricane wind speed data) required for MRI calculations is available for download below.
Examples A simple 2 story example is available for downloading below. How to run this example is thoroughly described within the user’s manual. A full scale 74-story building is also available for downloading.

The model scale time histories of the floor loads for both the 2-story and 74-story building, consisting of measurements in 10 degree increments around the building, are also available for download. In particular the floor loads associated with the 74-story building where obtained from wind tunnel tests carried out at the CRIACIV Boundary Layer Wind Tunnel, Prato, Italy The loads are part of an ongoing research project at the University of Perugia Italy and are made available for download with the kind permission of Prof. Massimiliano Gioffre and Prof. Vittorio Gusella.

Downloading Software and Sample Datasets
Requires Version 6 (or higher) of MATLAB Software The HR_DAD_1.1 software was developed and tested in the Microsoft Windows environment using version 6 of MATLAB. It is believed that the MATLAB m-files can be ported to non-Windows (e.g., Linux/Unix) environments with minimal changes. It should also run under version 7 of MATLAB.
File Formats In order to avoid individually downloading a large number of files, we have provided some of the files in archive format (i.e., only a single file has to be downloaded). Given that users may be running on different platforms and that some users may have firewalls that block the downloading of certain types of files, we have provided several alternatives for downloading.

Specifically, the following options are available:

  • The file may be provided as a self-extracting zip file. The advantages of this format are that the files are compressed (which speeds downloading) and that no software is required to unpack the files. The disadvantages of this format are that they only work for Windows platforms and some firewalls disallow the downloading of files with a "EXE" file extension.

  • The file may be provided as a non-self-extracting zip files. The advantage of this format is that it can be unpacked on Unix/Linux platforms (use the "unzip" command) and it can possibly be downloaded on Windows sites that disallow "EXE" files. The disadvantage is that Windows users will need software (typically the WinZip software, but it is possible that other archiving software can also handle this format) to unpack the files.

  • Some files are provided as individual files.
Files Available for Download You can download the following files for the HR_DAD_1.1 software.
Files on CD If you are unable to conveniently download the necessary files, you can request the files be sent on a CD (see the Contact Information below).
Contact Information This version of the HR_DAD software was developed by Dr. Seymour M. J. Spence of the University of Perugia, Italy, during his stay as a Guest Researcher at the Building and Fire Research Laboratory at NIST. Dr. Massimiliano Gioffre of the University of Perugia, and Dr. Emil Simiu of NIST served as advisors.

This software was developed on the basis of the research and development carried out by Dr. William Fritz and Dr. Rene Gabbai of the Building and Fire Research Laboratory at NIST. Please email questions or comments to or

A separate download page is also available for DAD software for rigid, gable-roofed buildings, developed by Joseph A. Main.

The source code of the HR_DAD_1.1 software is available in a non-self-extracting zip file.

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Date created: 11/22/2005
Last updated: 11/30/2018
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