The paper presents the results of a parametric study for 10 trapezoidal rib geometries in conjunction with eight types of floor beam cutouts to determine shape factors. In the case of ribs passing continuously through cutouts in the floor beam web, the floor beam exhibits a Vierendeel type truss behaviour. Keywords: bridges, Charpy testing, fracture, hardness testing, hydrogen stress cracking, impact testing, quenched & tempered steel, stress corrosion testing, ultrasonic hardness testingĪbstract: The structural response of a steel orthotropic bridge deck is characterised by the complex interaction between its components.
The hardness test methods were successfully used to identify 14 defective A514 steel plates on the two bridges. During the testing, two additional cracked splice plates were discovered that contained defective A514 steel. Field hardness testing was conducted over … a 10-week period beginning in October 2008. The plan incorporated the use of the ultrasonic contact impedance and impact hardness test methods. A test plan was developed that incorporated hardness testing to discriminate between acceptable and the defective A514 steels. The I-275 twin bridges contained large quantities of A514 steel that needed testing to identify any remaining defective steel. Consequently, this steel was also susceptible to stress corrosion cracking/hydrogen stress cracking (SCC/HSC). | Hartmann, J.Ībstract: Failure analyses of cracked splice plates made from ASTM A514 quenched and tempered steel revealed that the steel was inadequately tempered, resulting in an excessively hardened, brittle defective steel.
0 kommentar(er)
