Study on Applicability of a Pushover Analysis Method for Seismic Analysis of Long-Span Continuous Rigid Frame Bridge with High Piers

2012 ◽  
Vol 9 (1) ◽  
pp. 729-734 ◽  
Author(s):  
Yin Gu ◽  
Weidong Zhuo
Keyword(s):  
Seismic Analysis ◽  
Pushover Analysis ◽  
Analysis Method ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Rigid Frame Bridge

Seismic Analysis of Continuous Rigid Frame Bridge with Energy-Based Modal Pushover Method

2010 ◽  
Vol 163-167 ◽  
pp. 3939-3942
Author(s):  
Zhong Quan Zou ◽  
Li Ping Zhou ◽  
Guo Jing He
Keyword(s):  
Seismic Analysis ◽  
Pushover Analysis ◽  
Displacement Curve ◽  
Seismic Zone ◽  
Base Shear ◽  
Continuous Rigid Frame Bridge ◽  
Capacity Spectrum ◽  
Rigid Frame ◽  
Rigid Frame Bridge ◽  
Modal Pushover

Energy-based modal pushover analysis method has been proved to be an appropriate approach to perform seismic analysis for structures whose high mode effect is not negligible. It directly establishes the capacity spectrum based on energy increments, which corrects the deficiency of conventional modal pushover method that the capacity curve would not be unique or even be retorted while the base shear-top displacement curve is established with respect to different reference nodes of the structure. In this paper, a continuous rigid frame bridge with tall piers in seismic zone is analyzed with EMPA method. The results showed that EMPA is more adaptable than conventional methods, and the seismic performance of the bridge can satisfy the demand of the design code.

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.

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.

Studies on Dynamic Characteristics of a Typical Model of Asymmetric Continuous Rigid-Frame Bridge under Different Ratio of Middle Span to Side Span

2012 ◽  
Vol 226-228 ◽  
pp. 1543-1546
Author(s):  
Tian Liang ◽  
Jun Dong ◽  
Xue Jian Xiang
Keyword(s):  
Dynamic Characteristics ◽  
Seismic Analysis ◽  
Response Spectra ◽  
Guizhou Province ◽  
Western China ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Key Features ◽  
Rigid Frame Bridge ◽  
Typical Model

Due to the limit of complicated landform in western China, a typical continuous rigid-frame bridge could be easy to be built, especially for asymmetric spans. Based on the engineering background of Sinan Yantou river Bridge in Guizhou province, dynamic characteristics of the type of bridge are studied in this paper. Firstly, by using Midas/Civil, 6 different models are established and their modal analysis could be done while it is considered that the beam of left T-shaped is gradually decreasing under the same height of piers. Then, all seismic responses are calculated by using response spectra method. Finally, the computational results are discussed and some key features are summarized. Our investigation will have some valuable references for seismic analysis of the same style bridge.

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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