Loading Test and Temperature Effect on Steel Arch Bridge

Abstract

Before the bridge is operated, it is necessary to do a test to find out whether the bridge has met the applicable requirements and regulations and works properly with the service load. Tests include static and dynamic loading of bridges on the Water Front City bridge, Bangkinang, Riau. Static load test in the form of measurement of deflection and strain of the bridge structure when carried out the load on the bridge in a controlled and measurable manner. The given load is at least equal to the bridge service load according to specifications and service defects that occur do not exceed the specified limits. While the dynamic load test is in the form of recording bridge behavior when receiving dynamic loads. Static loading is carried out by placing several truck vehicles with measured dimensions and loads on each wheel to determine the amount of deflection and stress at ¼ - ½ - ¾ spans. Static load test results on the structure of the bridge, the maximum strain that occurs in reinforcing steel and concrete in loading conditions with a load of 2 trucks (50 tons), 4 (100 tons), 6 (150 tons), 8 (200 tons), 10 (250 tons) and 12 trucks (300 tons) respectively 17.62 MPa, 52.82 MPa, 61.95 MPa, 51.08 MPa, 105.49 MPa and 128.48 MPa. In unloading conditions, the maximum strain is 51.31 MPa, 70.38 MPa, 52.47 MPa, 88.71 MPa,75.20 MPa and 13.21 MPa respectively. The temperature difference of 15°C in arch element gives camber in the middle of the span of 15 mm for the arc and 13 mm for the girder. The natural frequency of the WFC bridge is 1,127 Hz which occurs in the vertical direction at a span of 100 meters.