Dynamic Response of a Heterotypic Concrete Filled Steel Tube Arch Bridge Subjected to Moving Vehicles

2011 ◽  
Vol 255-260 ◽  
pp. 1696-1700
Author(s):  
Yan Li ◽  
Xin Yi Huang
Keyword(s):  
Surface Roughness ◽  
Dynamic Response ◽  
Impact Factor ◽  
Damping Ratio ◽  
Steel Tube ◽  
Impact Factors ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Moving Vehicles ◽  
The Impact

As a new type structure, the dynamic behavior of the irregular concrete filled steel tube arch bridge under moving vehicles was rarely studied. In this paper, taking the bridge crossing Yitong river in Changchun of China as an example, the dynamic response of the bridge is investigated by the self-compiling vehicle-bridge coupled vibration analysis program. The surface roughness and vehicle speed are considered in the analysis. The results show that impact factors of the bridge increase as surface roughness deteriorated; the impact factor varies obviously for the different component; the tension impact factor of the short suspender is larger than that of long ones; damping ratio of structure has little effect on the impact factors. The research conclusions can be referred in the design and assessment for the similar bridges.

Vehicle-Bridge Coupled Vibration on Concrete-Filled Steel Tubular Arch Bridge

2011 ◽  
Vol 90-93 ◽  
pp. 1106-1111
Author(s):  
Hong Xia Tan ◽  
Zheng Qing Chen
Keyword(s):  
Impact Factor ◽  
Cross Sections ◽  
Dynamic Characteristics ◽  
Impact Factors ◽  
Arch Bridge ◽  
The Road ◽  
Moving Vehicles ◽  
Cfst Arch Bridge ◽  
Road Surface Roughness ◽  
The Impact

This paper studies the dynamic response and the impact factor of the concrete-filled steel tubular (CFST) arch bridge named Hejiang River Bridge under the moving vehicles. Research shows that the impact factor of CFST arch bridge at the vault and 1/4 arch rib is greatly influenced by the road surface roughness (RSR), and it is increased with the grade of RSR increases, meanwhile it is different at apiece section position of the arch bridge. The impact factor doesn't vary monotonically with the speed of vehicle, it appears the maximum when the speed of vehicle is between 20-25 km/h and 35-50 km/h, and the impact factors of different cross-sections are not just the same with the changing regularity of speed. Therefore, the dynamic characteristics of different structural components should be calculated in designing CFST arch bridge for discrepant dynamic characteristics of various constructional elements.

Impact Factor Statistics Analysis of Concrete Filled Steel Tube Arch Bridge Considered Random Roughness of Bridge Deck

2015 ◽  
Vol 648 ◽  
pp. 80-88
Author(s):  
Xiang Wei Hao ◽  
Feng Ma ◽  
Qing Yang Ma
Keyword(s):  
Impact Factor ◽  
Bridge Deck ◽  
Steel Tube ◽  
Statistic Analysis ◽  
Coupling Vibration ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Random Roughness ◽  
Vehicle Impact ◽  
The Impact

The essence of the axle coupling vibration in case of random bridge deck is random vibration, therefore, it is quite necessary to research the effect of vehicle impact on basis of statistic analysis. With some large concrete-filled steel tube arch bridge as the object, by applying a self-made analysis program on axle coupling vibration that was demonstrated by a dynamic test, a dynamic response analysis on axle was implemented for many groups of random roughness swatches. On basis of the analysis result, a statistic analysis was conducted for the dynamic impact effect of bridge under the conditions of different deck status and vehicle speeds, in the determination of vehicle speed and roughness, the impact factor obeys the normal distribution. The analysis result shows that, the level of deck status may apparently affect the mean value and the MSD(mean square deviation), the differences of vehicle impact factors in case of different assurance rates are large. It will effectively improve the reasonableness and scientificalness of the value of a vehicle impact factor to determine the impact factor according to the level of bridge importance and a statistic analysis method.

Investigation on the dynamic impact factor of a concrete filled steel tube butterfly arch bridge

2021 ◽  
pp. 113614
Author(s):  
Shiqiang Qin ◽  
Jiacheng Feng ◽  
Yun-Lai Zhou ◽  
Chao Li ◽  
Xuejin Huo ◽  
...  
Keyword(s):  
Impact Factor ◽  
Steel Tube ◽  
Dynamic Impact ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Dynamic Impact Factor

scholarly journals Dynamic Response of a Long-Span Concrete-Filled Steel Tube Tied Arch Bridge and the Riding Comfort of Monorail Trains

2018 ◽  
Vol 8 (4) ◽  
pp. 650 ◽  
Author(s):  
Hongye Gou ◽  
Wen Zhou ◽  
Changwei Yang ◽  
Yi Bao ◽  
Qianhui Pu
Keyword(s):  
Dynamic Response ◽  
Steel Tube ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Long Span ◽  
Tied Arch Bridge

Dynamic performance of a concrete-filled steel tube high-pier curved continuous truss girder bridge due to moving vehicles

2018 ◽  
Vol 22 (6) ◽  
pp. 1297-1311
Author(s):  
Yan Li ◽  
Xiaolong Ma ◽  
Wei Zhang
Keyword(s):  
Ride Comfort ◽  
Dynamic Performance ◽  
Simulation Method ◽  
Steel Tube ◽  
Impact Factors ◽  
Analysis Model ◽  
Concrete Filled Steel Tube ◽  
Moving Vehicles ◽  
New Type ◽  
High Pier

The dynamic performance of a new type of concrete-filled steel tube high-pier curved continuous truss girder bridges under moving vehicles is studied combining field testing and numerical simulation method by an actual bridge example. The dynamic response data were obtained before opening to traffic for the bridge under moving testing vehicles. A three-dimensional vehicle and bridge coupled vibration analysis model for curved bridges is proposed and validated. The dynamic behavior characteristics and vehicular ride comfort for this new type bridge are studied considering variable road surface and other conditions. The results indicate that the dynamic impacts of this bridge from vehicles are underestimated compared with those defined in the design code. In addition, the dynamic impact factors vary significantly for the local components and some of them could exceed the design value. Finally, the riding comfort of this bridge is evaluated, which suggests a fairly uncomfortable condition.

Sensitivity Analysis on Dynamic Properties of Large Span Concrete-Filled Steel Tube Arch Bridge

2012 ◽  
Vol 204-208 ◽  
pp. 1976-1979
Author(s):  
Hang Sun ◽  
Xiao Jian Han ◽  
Xiu Yun Gao
Keyword(s):  
Dynamic Properties ◽  
Steel Tube ◽  
Design Parameters ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Space Model ◽  
Long Span ◽  
Current Design ◽  
Arch Bridges ◽  
The Impact

The calculation formula of the vertical fundamental frequency of arch bridge has been given in current design codes, in which the rise-span ratio is the only variable on condition that the structure mass and stiffness are known. However, the dynamic properties of long-span concrete filled steel tube arch bridges have their own characteristics, which are influenced by a series of factors. Thus this article establishes a space model of a concrete-filled steel tube arch bridge. By analyzing the main design parameters’ influence on the structure dynamic properties, including rise-span ratios, arch-axis coefficient and wide-span ratios, some of conclusions has been made, which can be used for further research of the impact effect and earthquake dynamic response, and provide the necessary basis for the dynamic design of bridges of this kind

Orthogonal Test for Impact Factor of Rigid Frame-Continuous Combined Bridge

2011 ◽  
Vol 90-93 ◽  
pp. 574-579
Author(s):  
Yong Jun Zhou ◽  
Yu Zhao ◽  
Yi Fan Song
Keyword(s):  
Impact Factor ◽  
Fundamental Frequency ◽  
Damping Ratio ◽  
Orthogonal Test ◽  
Impact Factors ◽  
Driving Mode ◽  
Rigid Frame ◽  
Sensitive Parameters ◽  
The Impact ◽  
Critical Sections

It is reported that the impact factor is influenced by many parameters, whereas in most cases the impact factor is only related to the main span or the fundamental frequency of the bridge. In order to study the sensitive influence parameters of the impact factor for rigid-frame continuous combined bridge, based on the bridge-vehicle coupled vibration, nine influence parameters are considered ,which include the ratio fundamental frequency of vehicle to bridge, the mass of vehicle, the roughness of deck, the damping ratio of vehicle, the velocity of vehicle, the driving mode of vehicle, the rigidity of bridge, the arrangement of bridge and the soil-structure–interaction mode, then orthogonal test table is employed to study the structural impact factors in the critical sections under those parameters respectively, thus the sensitive parameters are derived. The results show that the ratio frequency of vehicle to bridge, the roughness of deck, the velocity of vehicle are the sensitive parameters affecting the impact factors. Therefore the impact factor should be interpreted as the function of muti-parameters rather than of only one parameter.

Vertical Dynamic Response of a Concrete Filled Steel Tube due to Transient Impact Load: Analytical Solution

2016 ◽  
Vol 16 (01) ◽  
pp. 1640014 ◽  
Author(s):  
Xuanming Ding ◽  
Yuming Fan ◽  
Ping Li ◽  
Gangqiang Kong
Keyword(s):  
Analytical Solution ◽  
Dynamic Response ◽  
Wave Equations ◽  
Impact Load ◽  
Separation Of Variables ◽  
Three Dimensional ◽  
Vertical Displacement ◽  
Steel Tube ◽  
Concrete Filled Steel Tube ◽  
The Impact

This paper presents an analytical solution of vertical dynamic response of a concrete-filled steel tube (CFST) due to transient impact loading. Both the concrete and steel are modeled by linear elastic material. The impact load is simulated by a semisinusoidal impulse. Three-dimensional (3D) wave equations those considering the vertical displacement are established. By combining the initial and boundary conditions, the frequency-domain analytical solution of displacement is deduced by Laplace transformation and separation of variables methods. The time-domain dynamic response is then obtained by numerical inverse Fourier transformation (IFT). Numerical examples are presented to verify the validity of the analytical solution developed in this study. The results indicate that the analytical solution proposed in this study shows good consistence with the existing solutions.

scholarly journals A Comprehensive Research of the Air-void Defect of Concrete-filled Steel Tube

2021 ◽  
Author(s):  
Chao Guo ◽  
Zhengran Lu
Keyword(s):  
Large Diameter ◽  
Nonlinear Behavior ◽  
Element Model ◽  
Steel Tube ◽  
Welding Temperature ◽  
Arch Bridge ◽  
Concrete Filled Steel Tube ◽  
Air Voids ◽  
Air Void ◽  
The Impact

Welded spiral steel tubes are adapted for use in a majority of the large-diameter concrete-filled steel tube (CFST) arch bridges due to technical as well as economic reasons. However, the welding temperature and other factors during the process of manufacturing of steel tube, initially result in a reduced spiral-welded seam (SWS) strength. Moreover, with the pumping of concrete into a steel tube, numerous deformities of the likes of laitance coating and air-voids occurred inevitably, particularly with the lack of air-entraining agent in China almost 20 years ago. This work makes use of ultrasonic scanning field experience to investigate the capacity of bearing within a repaired and reconditioned CFST arch bridge rib having defects such as air-void and reduced SWS strength under negligible compression of eccentric axial by carrying out its finite element model analysis of group. The outcome reveals that CFST bearing capacity is only minimally affected by the SWS strength as compared to concrete air-void, which can be ignored. The effect of air-voids and the nonlinear behavior of the constituents on the CFST behavior have also been probed into. The impact of the air-void on the rib capacity of bearing was investigated by conducting parametric studies. To conclude, we proposed a new index defining the ultimate strength of the rib for the defect, and presented a rather simple blueprint to determine the influence of air-void on the final strength of the arch bridge rib of CFST.

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