3. Setup of fatigue test of orthotropic steel bridge deck and AE monitoring A fatigue test and AE monitoring were conducted on a segment model f a full size orthotropic steel bridge deck. A sketch drawing of the tested model is shown in Figure 2. The dimension of the deck model is 12.54x2.99x0.6 (LxWxH) meter, it consists of 5 U ribs and 4 webs. The deck was alternatively loaded with two actuators at 1 Hz fatigue cycle. The locations of the two actuators are indicated in Figure 2. The intersection areas of the U ribs and the first two webs were monitored with AE. Figure 3 shows photos of the orthotropic steel bridge deck and AE sensors installed. 150 KHz integral preamplifier AE sensors R15I made by Physical Acoustics Corporation were installed on the U ribs in front of the first two webs. (a) Photo of an orthotropic steel bridge deck (b) Area monitored with 3 AE sensors Figure 3. Fatigue test and AE monitoring photos AE Sensors AE Sensor Figure 2. Drawing of the orthotropic steel bridge deck and actuator locations Loading position C G G C U rib Web
RkJQdWJsaXNoZXIy MjM0NDE=