According to the 2004 National Bridge Inventory, nearly 28% of Iowa's 25, 000 bridges are rated as structurally deficient or functionally obsolete. Many of these structures are rated so by traditional visual bridge inspection and codified rating procedures. With many of these structures needing replaced or repaired, the problem is compounded by increasing bridge project costs and decreasing funding for such projects. A diagnostic tool is often necessary to accurately quantify the actual behavior and load carrying capacity of these deficient structures.3.4.6 Rating Traditional hand rating calculations were preformed according to the AASHTO LFD code for the many locations of the bridge. In the initial rating calculation preformed by the Iowa DOT, the strengthening angles were not taken intoanbsp;...
|Title||:||Evaluation of a Structural Testing System|
|Publisher||:||ProQuest - 2007|