A beam-type element for analyzing the eccentric load effect of box girder bridges

Structures ◽  
2022 ◽  
Vol 36 ◽  
pp. 1-12
Author(s):  
Chao Zhao ◽  
Yi Zhou ◽  
Xingu Zhong ◽  
Gang Wang ◽  
Qunyu Yang ◽  
...  
Keyword(s):  
Box Girder Bridges ◽  
Eccentric Load ◽  
Box Girder ◽  
Load Effect ◽  
Girder Bridges ◽  
Beam Type

scholarly journals Reliability Assessment for PSC Box-Girder Bridges Based on SHM Strain Measurements

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Chuang Chen ◽  
Zonglin Wang ◽  
Yinhui Wang ◽  
Tao Wang ◽  
Zheng Luo
Keyword(s):  
Limit State ◽  
Reliability Assessment ◽  
Generalized Extreme Value Distribution ◽  
Bottom Plate ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Load Effect ◽  
Strain Measurements ◽  
Girder Bridges ◽  
Measured Strain

A reliability assessment method for prestressed concrete (PSC) continuous box-girder bridges based on structural health monitoring (SHM) strain measurements was proposed. First, due to the fact that measured strain was compositive and the variation periods of its components were different, a series of limit state equations under normal use limit state were given. Then, a linear fitting method was used to determine the relationship between the ambient temperature and the measured strain, which was aimed at extracting the vehicle load effect and the temperature load effect from the measured strain. Finally, according to the equivalent normalization method, the load effects unsatisfying the normal distribution by probability density function fitting were transformed, and the daily failure probabilities of monitored positions were calculated for evaluating the safety state of the girder. The results show that (1) the top plate of the box girder is more sensitive than the bottom plate to the high temperature, (2) the daily and seasonal strain variations induced by uniform temperature reveal an inconsistent tendency to the seasonal variation for mid-span cross sections, and (3) the generalized extreme value distribution is recommended for temperature gradient stress and vehicle induced stress fitting for box-girder bridges.

Longitudinal stress over supports of concrete box-girder bridges

1981 ◽  
Vol 8 (2) ◽  
pp. 155-164 ◽  
Author(s):  
A. Ghali ◽  
M. S. Cheung ◽  
W. H. Dilger ◽  
M. Y. T. Chan
Keyword(s):  
Finite Element ◽  
Beam Theory ◽  
Type Equation ◽  
Box Girder Bridges ◽  
Element Analysis ◽  
Box Girder ◽  
Girder Bridges ◽  
Beam Type ◽  
Concrete Box Girder Bridges ◽  
Classical Beam Theory

This paper describes a study of the values of longitudinal moments/stresses and their distribution at sections over the supports of continuous box-girder bridges. A series of continuous box-girder bridges are analyzed using the finite element method. Results from the finite element analysis are compared with the classical beam theory which is commonly used in the design office for this type of bridge. It is found that the use of the classical beam theory assuming knife-edge supports usually results in an overestimation of the support moments. A modified beam-type equation for the support moments is proposed here for the design of continuous box-girder bridges.

Transverse post-tensioning design and detailing of precast, prestressed concrete adjacent-box-girder bridges

PCI Journal ◽  
2009 ◽  
Vol 54 (4) ◽  
pp. 159-174 ◽  
Author(s):  
Kromel E. Hanna ◽  
George Morcous ◽  
Maher K. Tadros
Keyword(s):  
Prestressed Concrete ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Post Tensioning ◽  
Precast Prestressed Concrete

Crack-based serviceability assessment of post-tensioned segmental concrete box-girder bridges

Structures ◽  
2021 ◽  
Vol 30 ◽  
pp. 1097-1108
Author(s):  
Zhi-Qi He ◽  
Yonghui Li ◽  
Tian Xu ◽  
Zhao Liu ◽  
Zhongguo John Ma
Keyword(s):  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Post Tensioned

Temperature gradients and stress distributions in concrete box-girder bridges during hot-mix asphalt paving

Structures ◽  
2021 ◽  
Vol 33 ◽  
pp. 1954-1966
Author(s):  
Zhi-Qi He ◽  
Zeng Ma ◽  
Shixiang Zhang ◽  
Zhao Liu ◽  
Zhongguo John Ma
Keyword(s):  
Hot Mix Asphalt ◽  
Temperature Gradients ◽  
Stress Distributions ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Asphalt Paving ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges

Distribution Factors for Curved Continuous Composite Box-Girder Bridges

2005 ◽  
Vol 10 (6) ◽  
pp. 678-692 ◽  
Author(s):  
Magdy Samaan ◽  
Khaled Sennah ◽  
John B. Kennedy
Keyword(s):  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges

Fault-Tree Model for Risk Assessment of Bridge Failure: Case Study for Segmental Box Girder Bridges

2013 ◽  
Vol 19 (3) ◽  
pp. 326-334 ◽  
Author(s):  
Caitlyn Davis-McDaniel ◽  
Mashrur Chowdhury ◽  
Weichiang Pang ◽  
Kakan Dey
Keyword(s):  
Risk Assessment ◽  
Fault Tree ◽  
Tree Model ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Bridge Failure

Study on Crack Causes and Strengthening Measures of Large Span PC Continuous Box Girder Bridges

2010 ◽  
Vol 163-167 ◽  
pp. 3551-3554
Author(s):  
Wei Peng ◽  
Zhi Xiang Zha
Keyword(s):  
Prestressed Concrete ◽  
Load Test ◽  
Box Girder Bridges ◽  
Element Analysis ◽  
Box Girder ◽  
Girder Bridges ◽  
Long Span ◽  
Concrete Box Girder Bridges ◽  
Girder Bridge ◽  
Engineering Projects

This template Based on cracks observation and finite element analysis of real engineering projects as well as bridge load test after reinforcement, causes and types of cracks in prestressed concrete box girder bridges and treating measurements are systematically studied. The results obtained from the calculation are presented to demonstrate the effect of sensitive factors, such as arrangement of longitudinal prestressed tendons, the magnitude of vertical prestressed force, temperature gradient, etc. The results show that the arrangement of longitudinal prestressed tendons and the magnitude of vertical prestressed force take key roles in cracks control of box girder webs. Lots of treating measurements are presented in accordance with different types of cracks, some of them are applied to a reinforcement engineering of a long span pretressed concrete continuous box girder bridge with cracks. Load test after reinforcement of the bridge demonstrates the reasonability of the treating measurements. Several design recommendations and construction measures about reinforcements and some sensitive factors mentioned above are proposed to control cracks.

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