Assessment of Foreign Bridge Standards and Techniques
TULANE UNIV NEW ORLEANS LA DEPT OF CIVIL ENGINEERING
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Turkish bridge design standards were studied and compared with American design specifications, with attention focused on the live load. The major difference between the two standards was that the live load in Turkish standards is given in tonnes, whereas, in the American Association of State Highway and Transportation Officials Standard Specifications for Highway Bridges AASHTO 1996 it is in tons. Therefore, HS20 in Turkish standards is 10 percent heavier than HS20-44. Turkish bridges are currently designed to either HS20 or HS30, the latter being 65 percent heavier than HS20-44. There were some minor differences in other requirements due to conversion from U.S. customary units to metric units. Three types of Turkish bridges were analyzed using a service load approach according to AASHTO 1996 and using a Heavy Equipment Transporter as the live load. Only the primary loads, dead load, live load, and impact load were considered. The analysis did not include any modification for possible deterioration, damage, or aging of the bridges. Four of the tables provide the compressive strength of concrete used in Turkey, the properties of steel used in Turkey and the United States, bending moment in interior stringers and transverse beams, and shear forces for each member type. 20 tables, 81 figures, 29 refs.
- Civil Engineering