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.

scholarly journals Dynamic load test and load lateral distribution of box girder bridge in mining area under special load

2019 ◽  
Vol 136 ◽  
pp. 04064
Author(s):  
Shengtao Yuan ◽  
Weilong Zheng ◽  
Shunchao Chen ◽  
Chuanwen Hu ◽  
Wenbo Luo ◽  
...  
Keyword(s):  
Dynamic Load ◽  
Damping Ratio ◽  
Mining Area ◽  
Lateral Distribution ◽  
Load Test ◽  
Natural Vibration Frequency ◽  
Box Girder ◽  
Dynamic Load Test ◽  
Impact Coefficient ◽  
Girder Bridge

Dynamic load test of bridge is one of the important indexes to evaluate bridge operation and bearing capacity, however, the test of the lateral distribution of bridge is one of the important means to evaluate the state of 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, dynamic load test and lateral load distribution are studied, dynamic load test is to test the natural vibration frequency damping ratio and impact coefficient of the bridge through pulsating test and traffic running test, the transverse distribution of load is analyzed by deflection method and the experimental value of transverse distribution coefficient is compared with the theoretical value of girder method. The results show that under dynamic load, the first vertical natural vibration frequency of the bridge is 10.986, the damping ratio is 0.015%, and the impact coefficient is 1.07~1.26, the vertical measured fundamental frequency is larger than the calculated fundamental frequency, and the overall stiffness of the bridge meets with the design specification; the transverse connection among the box girders is close and the lateral distribution of load meets with the requirement of the design specification.

Research on Temperature Effects of the Pre-Stressed Concrete Box Girder Bridge

2015 ◽  
Vol 744-746 ◽  
pp. 821-826 ◽  
Author(s):  
Yi Xiang Fu
Keyword(s):  
Three Dimensional ◽  
Great Influence ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Box Girder ◽  
Finite Element Software ◽  
Environment Temperature ◽  
Concrete Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge

The distribution of the temperature gradient and temperature change of the pre-stressed concrete box girder are extremely complicated because of the multiplex environment. Temperature load has attached great importance in the field of engineering, and it has a great influence on the bridge’s structure, especially the box structure. The engineering background of this paper is a typical three-dimensional pre-stressed concrete continuous box girder bridge with variable cross section, comprising five spans in one continuous unit. Experiment on it and research the change rules of the temperature distribution, as well as the influence of the structure’s internal force resulted by temperature. Finite element software-Midas/FEA is used to model and calculate the bridge in order to analyze the temperature influence on structure’s stress in contrast to the measured data from the experiments

The Program Design of the Variable Cross-Section of Concrete Continuous Skew Beam Bridge

2008 ◽  
Vol 400-402 ◽  
pp. 633-638
Author(s):  
Min Chen ◽  
Zhong Chu Tian ◽  
Guo Liang Zeng
Keyword(s):  
Cross Section ◽  
Concrete Beams ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Girder Bridges ◽  
Practical Engineering ◽  
Uniform Cross Section ◽  
Girder Bridge ◽  
Beam Bridge ◽  
Compound Section

In practical engineering, we often encounter designs of variable cross-section or compound section skew girder bridge. While in many bibliographies, uniform cross-section of the concrete beams studying was carried out, but few of variable cross-section concrete beams were in-depth studied. Based on analyzing the mechanical behavior of variable cross-section beam skew girder bridge, the semi-analytic solution of variable cross-section beam skew girder bridges were provided in this paper. With this method developed a planar computation program to resolve the calculation problems of skew girder bridge, a more convenient way will be brought up for designers in calculation.

Stability Analysis of Single-Pier Variable Cross-Section Box-Girder Continuous Bridge

2014 ◽  
Vol 989-994 ◽  
pp. 923-926
Author(s):  
Guan Sheng Yin ◽  
Jie Bai ◽  
Jun Jie Feng
Keyword(s):  
Cross Section ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Lateral Stability ◽  
Eccentric Load ◽  
Box Girder ◽  
Factors Affecting ◽  
Safety Coefficient ◽  
Future Design ◽  
Transverse Stability

On the basis of Umansky box-girder torsion theory, the software of ANSYS is applied to simulate related engineering model. In considering a variety of live load conditions, the lateral stability of multi-span single-pier variable cross-section box-girder under torsion eccentric load is analyzed. Analysis results reveal that under different working conditions, the factors affecting the transverse stability of the bridge and the proportion of the value on each, such as gravity, the span ratio and the distance between support are different; When the overload ratio is 2 times larger, the bridge stability safety coefficient decreases along the curve and changes rapidly. In the future design of this kind of bridge, the overall lateral stability should be paid much more attention. Some methods and suggestions about how to prevent the emergence of security and stability problems are put forward in the end.

The Changes of Internal Forces and the Reliability of Curved Bridge Taking the Cross-Sectional Design of Axial Symmetrical

2014 ◽  
Vol 587-589 ◽  
pp. 1631-1636
Author(s):  
Zheng Jiu Zhao ◽  
Jing Hong Gao
Keyword(s):  
Cross Section ◽  
Variable Cross Section ◽  
Radius Of Curvature ◽  
Variable Cross ◽  
Cross Sectional ◽  
Box Girder ◽  
Curved Bridge ◽  
The Cross ◽  
Cross Sectional Design ◽  
Bridge Models

Taking a bridge of 160m long variable cross-section prestressed continuous curved box-girder as the research object and analyzing the cross-sectional design of axis with axial symmetrical or axial non-symmetrical to research the structure forces change of the upper part of bridge in different curvature. In order to test and verify the variable cross-section of prestressed continuous curved box-girder bridge is safe and reliable via cross-sectional design with axial symmetrical instead of axial non-symtrical within a radius of curvature of the interval. Creating the straight bridge and curved bridge models with different radius of curvature in same span by Midas/Civil to compare their structure forces.

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