Live-Load Test Comparison and Load Ratings of a Posttensioned Box Girder Bridge

2013 ◽  
Vol 27 (5) ◽  
pp. 585-593 ◽  
Author(s):  
Dereck J. Hodson ◽  
Paul J. Barr ◽  
Leonardo Pockels
Keyword(s):  
Load Test ◽  
Live Load ◽  
Box Girder ◽  
Box Girder Bridge ◽  
Load Ratings ◽  
Girder Bridge ◽  
Live Load Test

Live-load strain evaluation of the prestressed concrete box-girder bridge using deep learning and clustering

2019 ◽  
Vol 19 (4) ◽  
pp. 1051-1063 ◽  
Author(s):  
Hanwei Zhao ◽  
Youliang Ding ◽  
Aiqun Li ◽  
Zhaozhao Ren ◽  
Kang Yang
Keyword(s):  
Deep Learning ◽  
Gaussian Mixture Model ◽  
Mixture Model ◽  
Prestressed Concrete ◽  
Gaussian Mixture ◽  
Live Load ◽  
Box Girder ◽  
Concrete Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge

The monitoring data makes it feasible to quickly evaluate the cracking of the prestressed concrete box-girder bridge. The live-load strain can accurately quantify the load effect and cracking of bridges due to its explicit datum point of signal. Based on the live-load strain data from bridge monitoring system, this study develops a comprehensive data-driven method of state evaluation and cracking early warning for the prestressed concrete box-girder bridge. The feature of vehicle-induced strain is extracted using the deep learning and classification of long short-term memory network. The vehicle-induced strain features are clustered via Gaussian mixture model, and the cracking early warning of the bridge is conducted according to the reliability of heavy vehicle clustering data. This method can be used as an indicator for the bridge inspection, truck-weight-limit and reinforcement work. The results demonstrate that (1) using the long short-term memory network, a deep learning model can be trained to intelligently classify the non-stationary and stationary sections of vehicle-induced strains, of which the test accuracy of classification surpasses 99%, and (2) according to the Gaussian mixture model probability distribution of data, the vehicle-induced strain features can be clustered by the corresponding Gaussian mixture model crest, which is the premise for reflecting relational mapping between vehicle loading and strain response.

scholarly journals Analysis and study on static load test of box girder bridge in mining area under special load

2019 ◽  
Vol 136 ◽  
pp. 04063
Author(s):  
Shengtao Yuan ◽  
Weilong Zheng ◽  
Shunchao Chen ◽  
Chuanwen Hu ◽  
Wenbo Luo ◽  
...  
Keyword(s):  
Static Load ◽  
Mining Area ◽  
Operating Conditions ◽  
Load Test ◽  
Main Beam ◽  
Static Load Test ◽  
Box Girder ◽  
Working Performance ◽  
Box Girder Bridge ◽  
Girder Bridge

In order to evaluate the stress condition and working performance of a box girder bridge in a mining area under the special load of 100T, through static load test, the mechanical properties of the bridge under operating conditions were analyzed and studied. Static load test is the stress test of the main beam under the partial and medium load, finally, the measured results are compared with the finite element result. The results show that under the action of various loads, the check coefficient of the bridge strain and the main tensile strain check coefficient was not exceed the standard allowable value 1, the actual working performance of the structure is very good, the maximum relative residual strain was 8.33%, which are not 20% higher than the standard allowable value, the whole bridge is in the elastic deformation stage, meet with the normal use requirements.

Diagnostic Load Test of Continuous Prestressed Box Girder Bridge

2013 ◽  
Vol 101 (1) ◽  
pp. 1-8
Author(s):  
Sayan Sirimontree ◽  
Kridayuth Chompooming ◽  
Wacharapong Prasarnklieo
Keyword(s):  
Load Test ◽  
Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge

Load Test of Single‐cell Box Girder Bridge Cantilever Deck

1984 ◽  
Vol 110 (8) ◽  
pp. 1773-1785 ◽  
Author(s):  
Stephen J. Thoman ◽  
Charles M. Redfield ◽  
Robert E. Hollenbeck
Keyword(s):  
Single Cell ◽  
Load Test ◽  
Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge

Study on the Load Test of Variable Cross-Section Box Girder Bridge

2013 ◽  
Vol 859 ◽  
pp. 135-138
Author(s):  
Xing Hang Long ◽  
Ji Jun Su ◽  
Lei Wang ◽  
Hai Bo Han ◽  
Yue Long Sun
Keyword(s):  
Cross Section ◽  
Variable Cross Section ◽  
Load Test ◽  
Variable Cross ◽  
Box Girder ◽  
Dynamic Load Test ◽  
Impact Coefficient ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Main Girder

In order to study the load property of variable cross-section continuous box girder bridge, in this paper, the static and dynamic load test were carried on the main span for Xiaoqinghe super-large bridge in Shandong province. The main girder stress, deflection, impact coefficient, self-vibration frequency and the static and dynamic characteristics were analyzed, compared with the theoretical calculation to judge the safety of the bridge.

Rehabilitation of the Boivre Viaduct - A Multispan Prestressed Box Girder Bridge

PCI Journal ◽  
1986 ◽  
Vol 31 (3) ◽  
pp. 22-47 ◽  
Author(s):  
Charles C. Zollman ◽  
Serge H. Barbaux
Keyword(s):  
Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge
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