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DAD_ESWL v1.0 – Database-Assisted Design Software for High- and Mid-Rise Buildings

DAD_ESWL v1.0 This is the download page for DAD_ESWL v1.0, a MATLAB-based Database-Assisted Design (DAD) software package for high- and mid-rise buildings. The package was developed for use by the structural engineer in charge of the building design.

The software, which incorporates a user-friendly graphical interface, is an integrated design tool providing (i) time series of calculated wind-induced floor loads acting at the center of mass, based on time series of aerodynamic pressures and inertial forces, (ii) time series of member demand-to-capacity indexes, of inter-story drift ratios, and of accelerations.

The software incorporates ASCE 7-16 Standard requirements, ACI 318-10 requirements for reinforced concrete members, and AISC Specifications 360-10 for Steel Buildings. If requirements based on other documents are used, the corresponding portions of the software must be modified accordingly. For access to the source code, please find contact information at the end of this web page.

Required Input as MATLAB Files The following information is required as input for DAD_ESWL v1.0:

Details on structural members and whole structure

  • Dimensions of members
  • Cross-sectional shapes of sections (W or HSS for steel structures)
  • Reinforcement details (for RC structures)
  • Number of stories
  • Heights of floors

Structural static and dynamic properties

  • Number of modes and modal damping ratios
  • Mass and mass moment of inertia with respect to mass center for each floor
  • Influence coefficients, defined as the internal forces induced in cross sections of members by a unit load applied to the center of mass of a given floor
  • Internal forces in members induced by dead loads due to self-weight, super-imposed dead loads, and live loads
  • Mode shapes
  • Modal periods

Wind pressure data or wind loads

  • Time-varying pressure coefficients for each pressure tap, or wind loads applied at the mass center of each floor, obtained from wind tunnel tests on rigid models or from CFD analyses

Wind climate at building site

  • Databases of directional wind speeds for each type of wind occurring at the site (e.g., hurricane, thunderstorm, and synoptic wind), provided by the wind engineering laboratory.

All information required for DAD must be provided as a MATLAB formatted file (.mat file) or be typed in the software. The details are described in the accompanying User's Manual (downloaded below).

Output DAD_ESWL v1.0 determines the following wind effects corresponding to any specified mean recurrence intervals (MRIs):
  • Peak demand to capacity indexes for all members
  • Peak inter-story drift ratios calculated along selected column lines
  • Peak resultant accelerations calculated along selected column lines
Example A 60 story example is available for downloading below. How to run this example is described in the User's Manual.

The model scale time histories of the floor wind loads for the 60-story CAARC (Commonwealth Advisory Aeronautical Research Council) building for 36 wind directions in 10 degree increments are also available for download. The loads are based on simultaneous pressure time histories on the external surfaces of the building model, obtained from wind tunnel tests performed at the CRIAC IV Boundary Layer Wind Tunnel, Prato, Italy.

Downloading Software and Sample Datasets
Requirements The DAD_ESWL v1.0 software was developed and tested in the Microsoft Windows environment using MATLAB 2017a.
Stand-alone Executable File You can download and run the "stand-alone" file below. This contains a compiled version of the software with executable file. This requires installation of Matlab Runtime (MCR) from MathWorks, Inc.
Source Codes The source codes for the DAD_ESWL v1.0 (Matlab m-files) are supplied individually on demand by e-mail. Please find contact information at the end of this web page.
Files Available for Download You can download the following files for the DAD_ESWL v1.0 software.
Previous Versions You can download the following previous versions of DAD software

Additional Information The DAD_ESWL v1.0 software includes the capability to use OpenSees (Open System for Earthquake Engineering Simulation), the open-source software framework for simulating dynamic responses of structural systems provided by the Regents of the University of California. The copyright agreement can be found at
Contact Information The DAD_ESWL v1.0 software was developed by Dr. Sejun Park at the Engineering Laboratory at NIST. Dr. DongHun Yeo and Dr. Emil Simiu served as advisors.

Please email any questions, comments, or requests for the software (source code) to or

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Date created: 06/26/2018
Last updated: 04/26/2023
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