Shenyang north and South Highway Bridge ushered in 12 heavyweight examiner chompoo araya

Shenyang North South Expressway Viaduct ushered in the 12 heavyweight "Examiner" in September 21st, unity Road North and south of the Shenyang Expressway Viaduct to Wanghua overpass section welcomed a group of special examiner, large trucks 35 tons per vehicle weighing, a total of 12, according to the specific sequence of loading on the bridge, the viaduct are static and dynamic load test, and the establishment of electronic files of the bridge. Test site, 12 trucks loaded with debris and other heavy loads, the bridge in batches, in accordance with the requirements of parking in the specific parts of the bridge. When the vehicle is loaded on the bridge, the vibration of the bridge is obvious. The upper structure of viaduct adopts prestressed concrete continuous box girder and steel box girder structure two. On the bridge of static and dynamic load test, to test in the actual work condition, stress state and the design of the bridge structure are consistent with the expected value, which is the test of bridge performance and working condition, the most direct and effective way. Shenyang Project Construction Committee Office of the person in charge of the scene, the static load test will last more than 3 hours. According to reports, tests were arranged 24 strain sensors and 14 displacement sensors, these sensors like "Stethoscope", "beat of each bridge in the truck when driving the meridian point" real-time monitoring, direct observation of the key parts of the bridge all the stress and deformation state. After the static load test, the dynamic test was carried out. The dynamic test mainly tests the structural dynamic parameters, such as the natural frequency and the impact coefficient of the bridge. In the fluctuation test deck without any nearby traffic load and bridge site irregular source under the condition of high sensitivity through dynamic testing system for the determination of wind load at the bridge site, flow pulsation, random excitation caused by micro vibration of a bridge structure response, natural frequency measured structure. The barrier free driving test, heavy vehicles will pass through the bridge at different speeds, the vibration signal in the vehicle record under the excitation of each measured by the sensor, the test in the structure under the running state of the forced vibration characteristics, comprehensive parameters of bridge structure dynamic characteristics and the interaction of the whole.相关的主题文章: