Control Technology on Jacking Closure Construction of Liangjiang Great Bridge

2014 ◽  
Vol 587-589 ◽  
pp. 1430-1434
Author(s):  
Hao Jie Zhang ◽  
Zi Qiang Peng ◽  
Bao Lai Li ◽  
Xiao Chun Fan
Keyword(s):  
Prestressed Concrete ◽  
Reference Value ◽  
Bridge Engineering ◽  
Construction Technology ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Element Simulation ◽  
Jacking Force ◽  
Working Procedure ◽  
Rigid Frame Bridge

Prestressed concrete continuous rigid frame bridge is widely used in bridge engineering. Its closure is one of very important working procedure in the bridge construction. In this paper, taking Liangjiang Great Bridge in Xinxu Highway as an example, the methods for determining the Jacking force and displacement are discussed. The implementation of the process and construction technology of closure jacking scheme is introduced in detail. Through the finite element simulation, the stress state of on the structural pusher is analyzed. And the maximum stress of the pier bottom and the displacement of the pier top are obtained. They can verify the feasibility of the scheme. Monitoring results from the site construction verify the safety of the scheme. The method has a certain reference value on jacking closure construction for the similar bridge.

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.

Design of Prestressed Concrete Continuous Rigid Frame Bridge with V-Shape Piers

2012 ◽  
Vol 201-202 ◽  
pp. 821-824
Author(s):  
Shun Bo Zhao ◽  
Shi Ming Liu ◽  
Xiao Ke Li
Keyword(s):  
Prestressed Concrete ◽  
Construction Technology ◽  
Static Properties ◽  
Structural Shape ◽  
Box Girder ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Design Software ◽  
Rigid Frame Bridge ◽  
The City

This paper introduces the design of a prestressed concrete continuous rigid frame bridge with V-shape piers built in Shijiazhuang city, China. The model and structural shape of this bridge were stated considering the factors such as hydrology, environment, artistic display and construction technology. The V-shape piers in main elevations combining the changed sections and larger hanged roof of box-girder gave out the lively and attractive views of whole bridge. The design software MIDAS/Civil was applied to build the numerical model for analyzing the static properties of the bridge structure. The results show that the loading performances of the bridge meet the specifications of current Chinese design codes. The bridge has been constructed and operated since Jan. 2010, which is becoming a main linkage between city and outskirts, and a landscape of the Taiping River Park of the city.

Analysis of Crack Reason on Block No.0 of Continuous Rigid-Frame Bridge

2011 ◽  
Vol 71-78 ◽  
pp. 1392-1397 ◽  
Author(s):  
Wen Xiong Huang ◽  
Li Ying Tan ◽  
Kang Jing Zhou
Keyword(s):  
Temperature Difference ◽  
Construction Technology ◽  
Actual Situation ◽  
Construction Process ◽  
The Real ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Technology Process ◽  
Rigid Frame Bridge ◽  
Distribution Of Stress

Cracks on the Joint Part between Pier and Girder, namely Block NO.0 in the construction process, has become one of the major diseases of continuous rigid-frame bridges. Based on the real construction technology, process and environment of Yuquanxi Bridge, the uneven distribution of stress caused by various factors is precisely analyzed by ANSYS. The shrinkage difference of concrete, the excessive hydration heat, and the sunshine temperature difference is accurately simulated respectively. By comparing the numerical results with actual cracks condition, the results prove that the theoretical analyse is accord with the actual situation, and the real reason of cracks on Block No.0 of Yuquanxi Bridge is uncovered. This study is of great practical value in preventing cracks and improving bridge construction technology.

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.

Design and Analysis of Anchorage Zone and Deviation Block of External Prestressed Concrete Bridge

2013 ◽  
Vol 710 ◽  
pp. 342-347
Author(s):  
Bing Yi ◽  
Fang Yuan Li
Keyword(s):  
Prestressed Concrete ◽  
Optimization Design ◽  
Finite Element Models ◽  
3D Fem ◽  
Box Girder ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Key Points ◽  
Prestressed Concrete Bridge ◽  
Rigid Frame Bridge

As an external prestressed concrete box girder continuous rigid-frame bridge with the longest span in China, the Xiantan Bridge was reported in this paper for its special characteristics. The key points of the end cross beam for anchorage zone and deviation block for the deviator were introduced in detail for its design. The finite element models for them with 3D FEM were created to get the stress state to ensure the safety. Taking the stress distribution results into account, the optimization design for the thickness for these key locations was reported too. The results can provide reference for the similar projects.

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.

The Confirmation of Closure Jacking Force in Continuous Rigid Frame Bridge

2014 ◽  
Vol 638-640 ◽  
pp. 987-993
Author(s):  
Rong Xiang Shan ◽  
Yu Hui Shan
Keyword(s):  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Jacking Force ◽  
Rigid Frame Bridge

The theory deduces the formula of closure jacking force in the closure of mid-span in the continuous rigid bridge, and introduced the computation and accomplishment of jacking force in continuous rigid bridge, taking the example of Anwen Bridge.

Research on Prestressed Loss in Curving Hole of Prestressed Concrete Structure Caused by Frictional Resistance

2014 ◽  
Vol 587-589 ◽  
pp. 1668-1671 ◽  
Author(s):  
Chen Li ◽  
Kai Yin Zhang ◽  
Zhong Lin Fan
Keyword(s):  
Friction Coefficient ◽  
Prestressed Concrete ◽  
Frictional Resistance ◽  
Continuous Beam ◽  
Continuous Rigid Frame Bridge ◽  
Continuous Beam Bridge ◽  
Rigid Frame ◽  
Different Types ◽  
Beam Bridge ◽  
Rigid Frame Bridge

Excessive prestressed loss in prestressed concrete continuous beam bridge and continuous rigid frame bridge causes structures appearing different types of diseases. By theoretical analysis on computational expression of effective prestress in curving hole, and distribution of contact stress and experiment about prestressed loss caused by frictional resistance, this paper points out the disadvantages of current effective prestress formula in curving hole. According to the research on the major influencing factors of prestressed loss in curving hole-contact status and friction coefficient μ, it plays a remarkable role on the further analysis of prestressed loss in curving hole.

Design and Test Analysis of Mid-and-Long Term Monitoring System for External Prestressed Continuous Rigid Frame Bridge

2013 ◽  
Vol 838-841 ◽  
pp. 1087-1091
Author(s):  
Xu Hui Hu ◽  
Ning Zhong ◽  
Shi Hong Jing
Keyword(s):  
Monitoring System ◽  
Prestressed Concrete ◽  
Element Model ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Cable Force ◽  
Long Term Monitoring ◽  
Rigid Frame Bridge ◽  
Term Monitoring

Study and design a set of economical and practical mid-and-long term monitoring system for long-span prestressed concrete continuous rigid frame bridge relying on the engineering of Xintan Qijiang Bridge in Chongqing. Master the static characteristics of such parameters as displacement, stress and external cable force during operation process of bridge through finite element model and make a comparative analysis of the relevant data after running for two years to test the feasibility and practicability of mid-and-long term monitoring system for continuous rigid frame bridge suggested in the paper.

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