Open AccessEvaluation of bearing capacity of reinforced stone arch bridge based on dynamic load test
Author(s) -
Chuanwen Hu,
Wenbo Luo,
Shunchao Chen
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/546/4/042069
Subject(s) - structural engineering , natural frequency , bridge (graph theory) , vibration , stiffness , damping ratio , arch bridge , arch , load testing , engineering , acoustics , medicine , physics
In order to evaluate the stress and working performance of a reinforced stone arch bridge, the load test of the bridge is carried out. Dynamic load test is used to test the inherent fundamental frequency, damping ratio and impact coefficient of the bridge through pulsation test and sports car test. Under the dynamic load, the first vertical natural vibration frequency of the bridge is 5.005, the damping ratio is 0.203, the second vertical natural vibration frequency of the bridge is 6.274, the damping ratio is 0.021, the tested strain impact coefficient is between 1.03 and 1.10, the measured vertical fundamental frequency is greater than the calculated fundamental frequency, and the overall stiffness of the bridge meets the design specification. The test results show that the reinforcement method of thickening the main arch ring has good application value, can effectively improve the service level of the old bridge and prolong the safety service life, and has obvious social and economic benefits.