The design of pre-stressed concrete continuous curved beam bridge with extra-small radius and large curvature in New Wuhan Railway Station

2010 ◽  
Vol 97 (13) ◽  
pp. 29-36
Author(s):  
Jing Jiang ◽  
Gonglian Dai
Keyword(s):  
Small Radius ◽  
Curved Beam ◽  
Railway Station ◽  
Large Curvature ◽  
Beam Bridge

The Research on the Prestress-Effect in the Small Radius Curved Beam

2011 ◽  
Vol 243-249 ◽  
pp. 1504-1507
Author(s):  
Guang Hong Xiao ◽  
Qiu Ling Zhang ◽  
Chao Huang
Keyword(s):  
Vertical Displacement ◽  
Small Radius ◽  
Curved Beam ◽  
Box Girder ◽  
Curved Bridge ◽  
Finite Element Software ◽  
Prestressing Force ◽  
Simulation Based ◽  
The Difference ◽  
Spatial Entities

A general analysis method of curved bridge, pure twist theory, which is based on the bar structure mechanical, has been introduced in this paper, by analyzing the basic assumptions of the theory, the limitations of application of the theory is indicated, while the ratio between the width and span of the curved bridge is out of the rang prescribed in the theory. The prestress effect is studied by the method of numerical simulation based on the finite element software ANSYS . According to the result, it can be indicated that, under the prestress, a horizontal and vertical displacement of the curved beam have occurred. The whole beam appears the tendency of turning outside, and there has been wavy distortion in the outer cantilever slab of the box girder along the span. The analysis result shows that, the method of the force analysis of spatial entities should be adopted when the ratio of width/span is small, and the difference between the inner vertical resistant reaction and the outer one caused by the prestressing force should not be ignored.

scholarly journals ANALYSIS OF LATERAL DISPLACEMENT AND EVALUATION OF TREATMENT MEASURES OF CURVED BEAM: A CASE STUDY

2021 ◽  
Vol 30 (1) ◽  
Author(s):  
Jie Li ◽  
Dongchao Liang ◽  
Junfeng Zhang ◽  
Zhaodong Shi ◽  
Huai Chen
Keyword(s):  
Temperature Effect ◽  
Lateral Displacement ◽  
Residual Deformation ◽  
Element Model ◽  
Monitoring Data ◽  
Curved Beam ◽  
Displacement Monitoring ◽  
The Status ◽  
Reinforcement Measures ◽  
Beam Bridge

The curved beam bridge exhibits lateral displacement during construction and operation. Taking a curved beam bridge as an example, the status of lateral displacement of the bridge is investigated in detail in this paper. To understand the mechanism of the curved beam lateral displacement, further to determine the curved beam lateral displacement under temperature effect, using ANSYS software to establish solid element model of the curved beam, steady state thermal analysis method is applied to analyze temperature field. Based on the analysis, the lateral displacement under temperature effect is analyzed. Then in order to further explain the lateral displacement mechanism, to discuss the frictional force causing the residual deformation of the rubber bearing to make the lateral displacement of the curved beam, the mechanical mechanism of curved beam under temperature effect is approximately analyzed. On the basis of clarifying the mechanism of lateral displacement, the paper puts forward the reinforcement measures for the curved beam bridge. In order to verify the treatment effect, long-term displacement monitoring is performed on the bridge. Numerical studies and monitoring data show that temperature is the main factor that causes the lateral displacement. Monitoring data over the past year shows that the displacement of the bearing is less than the value of allowable displacement after the reinforcement measures are adopted, and the bridge is in a safe state.

Deformation Analysis of Short and Medium Span Curved Beam Bridge

2013 ◽  
Vol 347-350 ◽  
pp. 3546-3549
Author(s):  
Ju Jin ◽  
Xiao Fan Zhu ◽  
Hai Feng Ren
Keyword(s):  
Deformation Analysis ◽  
Curved Beam ◽  
Transverse Displacement ◽  
Software Modeling ◽  
Analysis Software ◽  
Element Analysis ◽  
Complex Needs ◽  
Deformation Law ◽  
Girder Bridge ◽  
Beam Bridge

Curved girder bridge can adapt to the complex needs of road, so it applies more and more. Because prestressed curved girder bridge is spatial structure, its deformation under load, prestress etc is very complicated. If ill-considered, it will cause accidents as cracking of beam body, too large transverse displacement and bearing disengaging etc. In this paper, by analysis of engineering examples, using ANSYS finite element analysis software modeling and calculating, we get the deformation law of small and medium span curved girder bridge under deadweight and prestress, and the law has guiding significance and practical value on design.

Effects of Curvature Radius on Seismic Response of Curved Box-Girders Bridge

2014 ◽  
Vol 587-589 ◽  
pp. 1543-1546
Author(s):  
Qing Zhao
Keyword(s):  
Finite Element ◽  
Dynamic Characteristic ◽  
Seismic Response ◽  
Curvature Radius ◽  
Curved Beam ◽  
Box Girders ◽  
Element Analysis ◽  
Tangential Stiffness ◽  
Radial Stiffness ◽  
Beam Bridge

Taking an engineering design case about a three-span uniform section continuous curved box-girders bridge of city viaduct,this paper sets up a finite element calculating model for the curved box-girders bridge by means of finite element analysis program ANSYS and researchs the influence of dynamic characteristic and seismic response on curved box-girders bridge with the different curvature radius under the same span. The analysis results show that in the same span of curved beam , the low-level frequency impact of changes in different curvature radius of the curved beam bridge is larger,the curvature radius is an importance parameter which influence on dynamic characteristic, and have significant influence on tangential stiffness、radial stiffness and seismic response of curved box-girders bridge.

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