NCHRP Report 350 Test 3-11 of Georgia Temporary Concrete Barriers

The main objective of this study was to evaluate the performance of Georgia's Temporary Concrete Barrier according to NCHRP Report 350, and a secondary objective was to obtain data that would be helpful in determining the length of barrier involved in a collision. To accomplish this, strains in the connecting loops at eight connections (four at the upstream end and four at the downstream end of the installation) were measured during the collision. A full-bridge set of strain gages were installed on the top loop and another on the bottom loop of each of the eight pin and loop connections, resulting in 16 channels of data. The barrier was placed, freestanding, on a concrete paved area with all slack removed at the connections. NCHRP Report 350 test designation 3-11 with the 2000 kg pickup truck was performed on the Georgia Temporary Concrete Barrier. The pickup truck impacted the installation 1.2 m upstream of the joint between segments 7 and 8 while traveling at a speed of 99.9 km/h and 25.6 degrees. Strain gages were installed on the top and bottom loops at the joints between segments 1 and 2, 2 and 3, 3 and 4, and 4 and 5 on the upstream end and at the joints between segments 11 and 12, 12 and 13, 13 and 14, and 14 and 15 on the downstream end. The installation consisted of a total of 18 barriers. The Georgia DOT Temporary Concrete Barrier with pin and loop connection met the required criteria for NCHRP Report 350 test designation 3-11.