Precautions against excessive deflection of long-span PC rigid-frame bridges

2014 ◽  
pp. 2349-2353
Author(s):  
Y Zhang ◽  
Y Chen ◽  
C Bao
Keyword(s):  
Long Span ◽  
Rigid Frame

Analysis of Technical Characteristics and Construction Focus of Long-Span Continuous Rigid Frame Bridge with High-Rise Piers

2014 ◽  
Vol 587-589 ◽  
pp. 1637-1641
Author(s):  
Yao Cui ◽  
We Nang Hou ◽  
Fei Ying Liu
Keyword(s):  
Deep Water ◽  
Water Reservoir ◽  
Bridge Pier ◽  
Reservoir Area ◽  
High Rise ◽  
Construction Methods ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Rigid Frame Bridge

Under the condition of the deep water reservoir area, the choice of bridge pier and long span continuous rigid frame beam construction methods are quite various. And the analysis of destruction of bridge depends mostly on the beam and piers. The paper cares mostly about these two parts.

Long Term Deformation Control of Long-Span Pre-Stressed Concrete Continuous Rigid Frame Bridge with Ballastless Track

2010 ◽  
Vol 163-167 ◽  
pp. 1515-1519 ◽  
Author(s):  
Jian An Cao ◽  
Mei Xin Ye ◽  
Wen Qi Hou
Keyword(s):  
Rail Transit ◽  
Bridge Construction ◽  
Deformation Control ◽  
Long Span ◽  
Ballastless Track ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
External Tendons ◽  
Rigid Frame Bridge

Aiming to Ronggui Bridge (RGB) on Guangzhou-Zhuhai Intercity Rapid Rail Transit (GZIRRT), long term deformation control of long-span pre-stressed concrete continuous rigid frame bridge with ballastless track was studied. Comparing with the non-controlled deformation, extend track laying six months later after bridge construction, reserve 48 post-tensioned cables in middle spans and tension 12 external tendons after tracking laying were all effective in decreasing the long term deformation of RGB with individual application. Taking bridge construction and railway service in consideration, applying the foregoing three measures in combination, deformation of RGB 20 years later after track laying was effectively controlled within 12.8mm in the side spans and 21.9mm in the middle spans, which is less than the deformation limitation of bridges with ballastless track. The combined measure has been adopted in the actual construction of RGB.

Analysis of Sensitive Factors of Long-Span Continuous Rigid Frame Bridge’s Stability with Thin-Wall Piers in the Construction Stage

2011 ◽  
Vol 255-260 ◽  
pp. 921-925 ◽  
Author(s):  
Hai Jun Wu ◽  
Yu Qiang Kang ◽  
Lei Zhang
Keyword(s):  
Prestressed Concrete ◽  
Wind Load ◽  
Basic Theory ◽  
Thin Wall ◽  
Large Span ◽  
Long Span ◽  
Rigid Frame ◽  
Main Factors ◽  
High Pier ◽  
The Stability

Analyzing the basic theory of stability, with a high pier of large span prestressed concrete continuous bridge as the example, the stability was analyzed when constructing, considering wind load, hanging basket, pier etc. Both eigenvalue and mode are got for the longest cantilever ting condition, the sensitivity of stability to various loads being analyzed. It is concluded that the unbalanced weight and the falling of basket are the main factors.

Seismic Performance Assessment of Long Span Continuous Rigid Bridge

2013 ◽  
Vol 353-356 ◽  
pp. 2033-2038
Author(s):  
Qi Wen Jin ◽  
Tong Ning Wang ◽  
Yi Li Sun ◽  
Zhao Tong Hu
Keyword(s):  
Pile Foundation ◽  
Plastic Hinge ◽  
Bending Moment ◽  
Internal Force ◽  
Seismic Capacity ◽  
Seismic Performance Assessment ◽  
Soil Function ◽  
Long Span ◽  
Rigid Frame ◽  
Cantilever Construction

Based on the theory of cantilever construction, combined with a three cross continuous rigid frame bridge, choosing the biggest cantilever stage, side span cross fold stages, middle span cross fold stage and complete bridge stage as the research object. Considering the pillar-soil function, making the seismic elastic-plastic response calculation. Getting the result that, during the earthquake, pillar-soil function can improve the flexible extension ability of the bridge structure so as to get better resistance seismic capacity. Internal force of the construction stage gradually reduces along the bottom pier, the middle pier and the top pier. Along the bridge, the maximum bending moment appears at the biggest cantilever stage. Horizontal to the bridge, the maximum bending moment appears at the side span cross fold stages. Plastic areas develops quickly during pier bottom and pile top, the crack is obvious; Plastic hinge first appears in the pile foundation, consuming earthquake energy through its plastic deformation so as to reduce the earthquake impact of pier. We should try to avoid plasticitys appearing in the pile foundation during the design, which will provide convenience for the follow-up maintenance.

Studies on Lay Out Scheme of Steel Beam in Midspan Bottom Slab of Long-Span Continuous Rigid-Frame Bridge

2011 ◽  
Vol 183-185 ◽  
pp. 1933-1937
Author(s):  
Dan Lv ◽  
Yi Feng Zheng ◽  
Qun Zhao
Keyword(s):  
Steel Beams ◽  
Steel Beam ◽  
Tension Stress ◽  
Variable Cross ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Straight Line ◽  
Rigid Frame Bridge ◽  
Bottom Slab

Most of steel beams in midspan bottom slab are fixed up following the shape of girder bottom edge with both ends anchoring to the bottom slab wedge. Due to the girder of long-span continuous rigid-frame bridge has variable cross section, the shape of steel beams in midspan bottom slab presents a curve opening downward, which does harm to the girder. Arranging steel beams along straight line in the bottom slab with both ends anchoring to the top wedge is better for girder to carry load. The analysis results of two methods analyzed by FEM shows that arranging of straight line lowers the stress of the top edge of girder meanwhile it increases the stress of bottom slab edge. Besides, the method lowers pressure stress and shear stress of the height middle of the girder where the steel beam anchoring and increases the main tension stress reservation which is good for the girder to carry load.

Analysis for Seismic Response of Long Span Rigid Frame Bridge

2011 ◽  
Vol 194-196 ◽  
pp. 1962-1966
Author(s):  
Xiao Jun Ning ◽  
Yi Tang Zhou
Keyword(s):  
Seismic Response ◽  
Lower Cost ◽  
Bending Moment ◽  
Bridge Design ◽  
Long Span ◽  
Rigid Frame ◽  
Rigid Frame Bridge ◽  
Intensity Region

Rigid frame bridge is widely used in China because of its lower cost. The aseismatic ability of rigid frame bridge is difficult to judge for designer when the bridge is used to span valley in intensity region. The seismic response of one rigid frame bridge with 160m span is calculated. It is indicated that the aseismatic ability of rigid frame bridge is good and bridge design is controlled by bending moment at bottom of pier.

Long Span Prestressed Concrete Continuous Rigid-Frame Bridge ANN Construction Control

2012 ◽  
Vol 204-208 ◽  
pp. 2261-2264
Author(s):  
Geng Feng Ren ◽  
Cun Jun Zou ◽  
Yue Xu
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Prestressed Concrete ◽  
Construction Control ◽  
Bridge Construction ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Artificial Neural ◽  
Rigid Frame Bridge

Based on the theory of ANN (Artificial Neural Network),The paper raised the method of construction control, and introduced the common forecasting method. According to the characteristic of ANN itself and the complexity of factors which influence the elevation, the paper analysed the influence aspects of ANN. On the promise of bridge construction precision, the paper raised section measure、elasticity model、temperature、delay of construction and cantilever for neural network’s input vector in bridge construction process. With the help of Graphical User Interface, built ANN, made the forecast function in the bridge construction into reality. Introduce the theory of Artificial Neural Network(ANN) into long span prestressed concrete continuous rigid-frame bridge construction control.

Space Analysis of Long-Span Continuous Rigid Frame Bridges

2013 ◽  
Vol 671-674 ◽  
pp. 1045-1050
Author(s):  
Xian Wu Hao ◽  
Ya Xun Yang
Keyword(s):  
Radius Of Curvature ◽  
Stress And Strain ◽  
Analysis Program ◽  
Element Analysis ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Design Proposal ◽  
Rigid Frame Bridge ◽  
The Impact

With the background of continuous rigid frame bridge,this paper considers the impact of the structural weight and the pre-stressed force in the construction phase,uses the ANSYS finite element analysis program to analyze the stress and strain of an continuous rigid frame bridge in the the largest cantilever state, focuses on different effects of the different radius of curvature and pier height.Through the analysis constructs the control mentality and the corresponding design proposal for the continuous rigid frame bridge had been provided.

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