Web-based Post-Earthquake Damage Assessment Software - BrDATs

Bridge Damage Assessment Tools (BrDATs) is a set of web-based structural programs for post-event damage assessment of bridge components using computer vision. BrDATs has been developed at South Dakota State University under grant No. ORSO 135461 funded by the National Center for Transportation Infrastructure Durability and Life Extension (TriDurLE), which is a USDOT University Transportation Center (UTC).

Post-event damage assessment of bridges can be done at four levels: Fast Reconnaissance (FR), Preliminary Damage Assessment (PDA); Detailed Damage Assessment (DDA); and Extended Investigations (EI). BrDATs can perform both PDA and DDA on bridge columns with seismic detailing under earthquakes.  Other components and hazards may be added later.

Elastic Response Spectrum

This function generates elastic response spectra including Displacement Spectrum, Pseudo Acceleration Spectrum, and Pseudo Velocity Spectrum, which are needed in "Response Spectrum Analysis" of Structures. Newmark Linear Method was used in this function to solve "Equation of Motions" for different periods. 

Modal Time History Analysis of Structures:

Modal analysis can be performed using this function.  By modifying input excitation (F or ft) , you can analyze the structure for either earthquake (base-seismic excitation) or time-dependent load applied to different stories. 

Response of SDOF:

This function generates the response of a Linear SDOF to an earthquake ground motion using Newmark's methods. Both methods developed by Newmark were included. This code can be used by engineers, researchers, and students especially those in Structural Dynamics.