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| Experiment of nonuniform excitation for bridge based on single shaking table |
| 1. School of Highway, Chang′an University, Xi′an, Shaanxi 710064, China; 2. School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an, Shaanxi 710055, China |
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Abstract To investigate the dynamic response of bridges under nonuniform excitation, a 1/20 reducedscale continuous beam bridge was designed and fabricated. The seismic simulation shaking table test with nonuniform excitation input was carried out. The extension table was set for the single small vibration table, and the table input excitation was changed to improve the shaking table equipment. The ElCentro and Taft waves suitable for the class Ⅱ field were selected, and the macroscopic failure modes and the time history displacement curve of main parts were analyzed under different seismic intensities. The experimental results show that the bridge damage is increased with the increasing of seismic intensity, and the difference of seismic excitation input between original table and extended table becomes obvious after improving the shaking table equipment. The improved equipment can be used for nonuniform seismic excitation shaking table test of large span bridge structure, and the dynamic response of bridges under seismic effect can also be obtained.
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Received: 11 October 2016
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2017, Vol. 38 
