E3S Web Conf.
Volume 233, 20212020 2nd International Academic Exchange Conference on Science and Technology Innovation (IAECST 2020)
|Number of page(s)||4|
|Section||HCCE2020-Hydraulic, Civil and Construction Engineering|
|Published online||27 January 2021|
Research on the evaluation method of bearing capacity of existing Bridges based on dynamic load test
1 College of Civil Engineering, Southwest Forestry University, Kunming, Yunnan, 650224, China
2 College of Civil Engineering, Southwest Forestry University, Kunming, Yunnan, 650224, China
* Corresponding author: 429459859 @qq.com
The author carried out dynamic load test research on a prestressed concrete rigid frame bridge. Under dynamic load, the ratios of the measured and theoretical frequencies of the first four vertical vibrations of the bridge were 1.081, 1.153 respectively. The corresponding measured damping ratios are 0.011, 0.010 respectively. The maximum dynamic coefficient of bridge sports car test is 1.049, and the corresponding dynamic strain increment coefficient is 0.059. The measured impact coefficient is between 0.012 and 0.049, which is basically equivalent to the design impact coefficient of 0.05.The test results show that the existing bridge works well under the test load, and the bearing capacity of the structure meets the requirements of the design load level.
© The Authors, published by EDP Sciences 2021
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