Thesis - Open Access
Master of Science (MS)
Civil and Environmental Engineering
Analytical Model, Distribution Factors, Double Tee Bridge, Dynamic Load Allowance, Field Test
Two deteriorating DT bridges in South Dakota, both over 30-years old, were field tested with a static and dynamic load. From the recorded strain values, the liveload distribution factors (LLDFs) and dynamic load allowance (IM) factors were calculated. The AASHTO LRFD and AASHTO Standard Specifications were compared with the field LLDFs and IMs. It was determined that the AASHTO LRFD Specifications were conservative for deteriorating DT girder bridges, with two exceptions. The AASHTO Standard codified LLDFs were significantly higher than the field LLDFs in all cases. The AASHTO LRFD and AASHTO Standard specifications were conservative when calculating the IM factors in all instances for the two deteriorating DT bridges. The strain data from the field tests was analyzed for LLDFs in three different approaches. Then, these approaches were compared to AASHTO LRFD and AASHTO Standard specifications. The girder approach had an average percent difference of 34% and 91% when compared to the AASHTO LRFD and AASHTO Standard specifications, respectively. The joint approach produced average percent differences similar to the girder approach. The stem approach was the most conservative approach, with an average percent difference of 58%, compared to AASHTO LRFD.
Number of Pages
South Dakota State University
In Copyright - Educational Use Permitted
Kidd, Brian, "Field and Numerical Study for Deteriorating Precast Double-Tee Girder Bridges" (2019). Electronic Theses and Dissertations. 3631.
Available for download on Tuesday, December 15, 2020