Title: 
Python Code for the Time-Varying Behavior (TVB) Model for Effects of Bridge Redecking

Authors: 
Beeva Adhikari
Juan Sebastián Spinel Peñuela, https://orcid.org/0000-0002-1092-0260 
Rémy D. Lequesne, https://orcid.org/0000-0003-2146-7243 
William N. Collins, https://orcid.org/0000-0002-2835-6389 

Permanent link:  https://hdl.handle.net/1808/35618 

Abstract:
A time-varying behavior (TVB) model was developed in python to assess the effects of deck replacement on the long-term behavior of precast/prestressed concrete girder bridges. The model can be used to estimate concrete bridge behavior over time using a time-step analysis approach to calculate incremental changes in girder behavior through several lifespan stages, which are delineated by changes in loading or boundary conditions. Model outputs include bridge deflections, prestress force, and concrete stresses over time. Model outputs can be accessed at different points along the bridge span and at different depths of the bridge. The model structure and underlying assumptions are described in Adhikari et al. (under review) and, for an earlier version of the model, in Adhikari, Lequesne, and Collins (2024). 

Directions:
To run an analysis for one bridge, download and unzip the code file and then:
1. Create a folder with the name of the bridge. Example "1new".
2. Update the input data on the sheet "Data_Input" in the file "Inputs.xlsm" and store it in the folder created in step 1.
3. Open script "iteration.py" and change name of "count" variable to the name of the analysis folder. Example "count = '1new'".
4. Run the code. Analysis results will be stored in the same folder. Example: "1new/"

References: 
Adhikari, B., Lequesne, R. D., and Collins, W., (2024). Long-Term Implications of Redecking Bridges with Prestressed Concrete Girders, SM Report No. 158, The University of Kansas Center for Research, Inc., 152 pp. https://hdl.handle.net/1808/34966 
Adhikari, B., Spinel, J. S., Lequesne, R. D., and Collins, W., (under review). “Time-Varying Behavior (TVB) Model for Estimation of Long-term Effects of Deck Replacement on Concrete Bridge Behavior”.