Analysis of Long-span Continuous Curved Bridge with Small Radius by Grillage Method

2017 ◽  
Author(s):  
X Gu ◽  
L Zhao
Keyword(s):  
Small Radius ◽  
Curved Bridge ◽  
Long Span ◽  
Grillage Method

Analysis of Parameters Influence on Structure of Continuous Curved Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1251-1254
Author(s):  
Xiang Gu ◽  
Shang Ying Xie ◽  
Shao Min Jia
Keyword(s):  
Finite Element ◽  
Small Radius ◽  
The South ◽  
Curved Bridge ◽  
Ring Road ◽  
Finite Element Software ◽  
Long Span ◽  
Key Parameter

In the modern urban bridge projects,especially the urban interchange projects and the urban viaduct projects,the long-span curved bridge with the small radius is often inevitably used,considering the transportation under bridges,pipelines and aesthetic factors.This kind of long-span curved bridge with small radius was adopted on the south of Second Ring Road in Chendu of the project of "Two Expressways,Two Extended Roads,Two Ring Roads".The influence,which the change of the parameters on the structure had,was analyzed by using the finite element software of Midas Civil 2010.Then,the parameter which had greatest impact on the inner force of the structure was found.The girder depth is the key parameter in design.

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 Design of Pedestrian Landscape Flying-Bird Arch Bridge with Cable-Stayed Cable and Lissajous Curved Arch Rib

2021 ◽  
Vol 237 ◽  
pp. 04024
Author(s):  
Guangchuan Zhu ◽  
Wenping Xu ◽  
Jinfa Xu
Keyword(s):  
Bridge Deck ◽  
Element Model ◽  
Internal Force ◽  
Steel Tube ◽  
Dynamic Mode ◽  
Structural Dynamic ◽  
Arch Bridge ◽  
Curved Bridge ◽  
Long Span ◽  
Positive Projection

In view of the demand of super long span pedestrian landscape bridge with curved deck, this paper proposes a kind of cable-stayed and flying-brid arch bridge with Lissajous curved arch rib and double curved bridge deck. Its plane positive projection is Lissajous curve figure, the side elevation of the arch rib is the shape of the cable-stayed and flying-brid arch, and the arch foot cable and the upper space cable between the arch ribs are installed on the Lissajous spatial curved arch rib with concrete-filled steel tube to form a self balanced structure system, which floats and drags across the river. The main arch sling and the tail cable are installed, the double curved bridge deck and the central circular sightseeing platform are suspended, and multiple groups of spatial cables work well together to complement each other, with having complementary advantages. Combined with the actual project, the parameter design is carried out, the Midas finite element model is established, the internal force of the structure is calculated, the structural dynamic mode and stability analysis are carried out, the rationality of its structural performance is verified by analysis and research.

scholarly journals Shaking Table Test of High Pier and Small Radius Curved Bridge under Multi-point Excitation

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Lei Yan ◽  
Guo Li ◽  
Kang An ◽  
Kefeng Yue ◽  
Zhi Lin
Keyword(s):  
Seismic Response ◽  
Seismic Waves ◽  
Shaking Table Test ◽  
Damping Ratio ◽  
Shaking Table ◽  
Small Radius ◽  
Curved Bridge ◽  
Bridge Model ◽  
High Pier ◽  
The Impact

The non-uniform stratum and uneven surface have the complicated seismic spatial variability. The seismic response of high pier and small radius curved bridge caused by the seismic specificity of this kind of terrain has not been systematically studied. According to the multi-point excitation theory of long-span structures and the similar theory of shaking table test in model structures, a high pier with small radius curved girder bridge was used as the research object. The shaking table test of real bridge model was carried out to study the seismic response laws of this kind of bridge under multi-point excitation. The results show that the designed seismic wave expansion device can meet the test requirements. The frequency of the model structure decreases rapidly and the damping ratio increases during the whole test process. The local terrain effect amplifies the seismic response of high pier and small radius curved bridge. The seismic response of high pier and small radius curved bridge is affected by different frequency spectrum seismic waves, and there is a big difference. Based on the above results, the impact of multi-point excitation should be considered in seismic design of high pier with small radius curved bridge.

Studies on Mechanical Model of Geometrically Pre-Eccentric Optimization Based on a Small Radius Ramp Curved Bridge with Single Column in City

2012 ◽  
Vol 226-228 ◽  
pp. 1618-1621
Author(s):  
Zhi Gang Qi ◽  
Jun Dong ◽  
Dan Hu
Keyword(s):  
Bending Moment ◽  
Internal Force ◽  
Small Radius ◽  
Second Phase ◽  
Dead Weight ◽  
Curved Bridge ◽  
Support Reaction ◽  
Single Column ◽  
Torque Moment ◽  
System Temperature

Under the coupling action of bending and torsion are there such complex mechanical characteristics in a small radius ramp curved bridge with single column in city. Based on Midas/Civil software, a small radius ramp curved bridge with single column is studied in this paper. Under the combined action of the first phase of dead weight, the temperature gradient, the system temperature, the second phase of dead weight and vehicle load, the mechanical properties of a ramp curved beam bridge have been studied in detail for different pre-eccentricity. Then, it is under different eccentric actions that different results with the changes of such variations as support reaction, displacement, shear force, bending moment, torque moment and torsion deformation are discussed. Our investigation shows that reasonable pre-eccentric setting could greatly reduce internal force in the bridge and improve the torque distribution so as to optimize the distribution of internal force in bridge.

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