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.

The Study of Aseismatic Performance of Continuous Rigid-Frame Bridge

2011 ◽  
Vol 243-249 ◽  
pp. 1901-1907
Author(s):  
Yong He Li ◽  
Ren Xiong ◽  
Ai Rong Liu ◽  
Jun Ping Zhang
Keyword(s):  
Plastic Hinge ◽  
Bending Moment ◽  
Reinforcement Ratio ◽  
Strong Impact ◽  
Plastic Rotation ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Rigid Frame Bridge ◽  
The Impact

The aseismatic performance of long span continuous rigid-frame bridge is an important but difficult research topic. To explore the impact of pier height and reinforcement ratio on long span continuous rigid-frame bridge’s aseismatic performance, Midas/Civil bridge Finite Element program is used to construct the three-dimensional model of a continuous rigid-frame bridge in this research. Fiber element and plastic hinge are used in pier simulation. Through the adjustment of pier height and ratio of reinforcement, the internal force, displacement and plastic rotation of bridge pier’s critical sections are analyzed under the action of seismic loading. Thereby, the impact of pier height and plastic hinge on such bridge’s aseismatic performance is obtained. It is shown that: maximum displacement, bending moment and plastic rotation increase at pier cap with pier height, indicating that pier height has strong impact on seismic response. And with increasing reinforcement ratio, the bending moment and yielding moment at pier cap and base both increase. Therefore, suitable pier height and reinforcement ratio should be selected for better aseismatic performance.

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.

scholarly journals Time-varying Reliability Analysis of Long-span Continuous Rigid Frame bridge under Cantilever Construction Stage based on the Monitored Strain Data

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Ying hua Li ◽  
Ke sheng Peng ◽  
Lu rong Cai ◽  
Jun yong He
Keyword(s):  
Prestressed Concrete ◽  
Base Plate ◽  
Internal Force ◽  
Time Varying ◽  
Construction Stage ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Strain Data ◽  
Cantilever Construction ◽  
Rigid Frame Bridge

Abstract: In general, the material properties, loads, resistance of the prestressed concrete continuous rigid frame bridge in different construction stages are time-varying. So, it is essential to monitor the internal force state when the bridge is in construction. Among them, how to assess the safety is one of the challenges. As the continuous monitoring over a long-term period can increase the reliability of the assessment, so, based on a large number of monitored strain data collected from the structural health monitoring system (SHMS) during construction, a calculation method of the punctiform time-varying reliability is proposed in this paper to evaluate the stress state of this type bridge in cantilever construction stage by using the basic reliability theory. At the same time, the optimal stress distribution function in the bridge mid-span base plate is determined when the bridge is closed. This method can provide basis and direction for the internal force control of this type bridge in construction process. So, it can reduce the bridge safety and quality accidents in construction stages.

scholarly journals Programming for solving plane rigid frame based on MATLAB

2020 ◽  
Vol 319 ◽  
pp. 09003
Author(s):  
Xiaokun Chen
Keyword(s):  
Computer Calculation ◽  
Bending Moment ◽  
Internal Force ◽  
Visual Design ◽  
Displacement Method ◽  
Whole Process ◽  
Programming Tool ◽  
Rigid Frame ◽  
The Matrix ◽  
Manual Calculation

Based on the idea of the matrix displacement method, this paper designs a program which can be used to solve the internal force of the continuous beam and rigid frame with MATLAB. It mainly demonstrates how to design a program to realize the matrix displacement method with MATLAB. In addition, some techniques are included in order to realize the correspondence between the manual calculation and the computer calculation, such as “Using lambda to locate”, “Crossing out rows and columns” and visual design. Therefore, based on the structural mechanics, combined with the principle of matrix displacement method, this paper shows the whole process from inputting the information of the rigid frame to solving the internal force of the rigid frame to outputting the bending moment diagram using MATLAB as the programming tool.

Study on Rapid Closure Technology of Long Span Continuous Rigid Frame Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1120-1124
Author(s):  
Dong Lian Tan ◽  
Deng Ke Wang ◽  
Wen Ru Lu ◽  
Long Zhang ◽  
Xin Yuan Lin
Keyword(s):  
Prestressed Concrete ◽  
Internal Force ◽  
System Transformation ◽  
Construction Period ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Construction Procedure ◽  
Rigid Frame ◽  
Jacking Force ◽  
Rigid Frame Bridge

The choice of closure order of long span prestressed concrete continuous rigid frame bridge is the key part on its construction procedure, which has a big influence on the gross force and alignent of the whole structure. On the Basis of the Hanjiang bridge, the paper studies the closure order of long span prestressed concrete continuous rigid frame bridge and its system transformation procedure as well as the effect of jacking force etc. It shows that the technique of the midspan and the sidespan close at the same time not only meets the requirement of allowable internal force, but also has the benefit of shorten the construction period as well as reducing the degree of construction difficulty.

Study of Safety Influence Factor of Bridge Substructure in Loess Gulch

2012 ◽  
Vol 546-547 ◽  
pp. 89-96
Author(s):  
Jin Wei ◽  
Zhong Ju Feng ◽  
Feng Ma
Keyword(s):  
Soil Erosion ◽  
Debris Flow ◽  
Pile Foundation ◽  
Influence Factor ◽  
Lateral Displacement ◽  
Bending Moment ◽  
Zero Point ◽  
Internal Force ◽  
Prevention Measures ◽  
The Stability

In this paper, the geology characteristics of loess gulch area were summarized. The mechanical models of the influence of landslide, debris flow and soil erosion on the safety of the pile foundation were created. The influence of the geology casualty on the safety of the pile foundation were analyzed. The analyses showed, when the pile foundation located the varied position of the loess gulch, the influence of soil erosion on the pile foundation character (acting force of pile side, free length of the pile, the first zero point position of the flexure curve, drawdown of the maximum bending moment, the increment of the lateral displacement, the drawdown of the lateral bearing capacity, the drawdown of the stability, etc.) were strikingly different. The calculation method of the pile and pier internal force was put forward under the function of landslide thrust and pressing force of debris flow. The corresponding prevention measures to different influencing factors were presented in the end.

Construction Stage Mechanical Performance Analysis of Long-Span Continuous Rigid Frame Bridge

2014 ◽  
Vol 1030-1032 ◽  
pp. 750-753
Author(s):  
Hua Su
Keyword(s):  
Finite Elements ◽  
Mechanical Performance ◽  
Internal Force ◽  
Construction Process ◽  
Construction Stage ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Rigid Frame Bridge ◽  
Finite Elements Model

Accurate simulation of construction process of continuous rigid frame bridge is a foundation to make a bridge built accurately. Based on the suit iteration method, this paper used MIDAS to built a 3D finite elements model, the internal force and deformation results of each construction stage was obtained. This study provided a good theoretical reference for the control of long-span continuous rigid frame bridge construction..

Analysis of Dynamic Characteristics of Pile-Soil Coupling Effect in Consideration of Large Span Cable-Stayed Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1270-1273
Author(s):  
Wen Yuan Chen
Keyword(s):  
Axial Force ◽  
Soil Structure ◽  
Coupling Effect ◽  
Reaction Force ◽  
Bending Moment ◽  
Internal Force ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Pile Cap ◽  
Force Calculation

Using the viscouselastic artificial boundary, three conditions of long-span cable-stayed bridge are analyzed,such as pile cap consolidation, pile - structure and pile soil structure interaction. Natural frequency of bridge of pile - soil - structure coupling becomes small and cycle becomes long. The pile bottom reaction force decreased obviously, at the same time, the axial force , bending moment, axial force of cable, tower of axial force and bending moment is also reduced significantly. Cable-stayed bridge is a special flexible structure, so, static internal force calculation in the tower bottom consolidation pattern is safe, but the value is too large.

Simulation Analysis on Construction of Liangjiang Great Bridge

2014 ◽  
Vol 587-589 ◽  
pp. 1698-1702
Author(s):  
Min Si ◽  
Shi Xiang Bie ◽  
Bao Lai Li ◽  
Xiao Chun Fan
Keyword(s):  
Prestressed Concrete ◽  
Simulation Analysis ◽  
Bridge Construction ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Initial Camber ◽  
High Pier ◽  
Cantilever Construction ◽  
Rigid Frame Bridge

Liangjiang Great Bridge is the prestressed concrete continuous rigid frame bridge with high pier and long-span. It adopts the segmented cantilever construction method. The process of its construction is the key to the construction control simulation analysis. In this paper, based on the characteristics of the bridge construction, finite element method is used to establish the simulation model. Cantilever construction stages and closure stages of bridge are simulated and analyzed. The structure deflection diagrams in the each section construction and the later construction considering the creep and shrinkage of concrete are obtained. The initial camber of each segment is given in the construction. The stress characteristics of key section are analyzed in the construction process. It provides a basis for monitoring and on-site construction of bridge and the reference for similar bridge construction.

Study on the Construction Control of Long-Span V-Shape Rigid Frame Composite Arch Bridges

2011 ◽  
Vol 255-260 ◽  
pp. 1043-1047
Author(s):  
Hong Ye Gou ◽  
Qian Hui Pu ◽  
Jun Ming Wang ◽  
Guo Wei Hu ◽  
Ze Yu Chen
Keyword(s):  
Structural Alignment ◽  
Internal Force ◽  
Constant Load ◽  
Calculation Model ◽  
Construction Control ◽  
Whole Process ◽  
Long Span ◽  
Rigid Frame ◽  
Simulation Calculation ◽  
Arch Bridges

The construction scheme of long-span V-shape rigid frame composite arch bridge is discussed. In process of simulation calculation of the construction, the author compiles APDL command flow program by using the unit birth-death technique, establishes simulation calculation model in the construction process. The creep characteristics of concrete are also taken into account. The whole process of beam first-to-arch later stage construction are calculated and studied.By researching on construction control of Xiaolan channel super large bridge, the feasibility of the construction program is evaluated, the alignment and displacement in each construction ideal state are determined and the alignment and displacement in the following construction state are predicted. The stress controling results of the critical sections are researched on to make the construction go along well as designed, make sure the safety during construction, the structural internal force under constant load and structural alignment are complied with the design requirements and the construction quality and safety are ensured.

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