Dynamic Buffeting Response Analysis of High Pier and Long Span Continuous Rigid Frame Bridge with Stochastic Wind Field

2012 ◽  
Vol 538-541 ◽  
pp. 2531-2535
Author(s):  
Tian Zhi Hao ◽  
Xiao Li Xie ◽  
Tian Jia Hao
Keyword(s):  
Wind Field ◽  
Time History ◽  
Response Analysis ◽  
Force Model ◽  
Buffeting Response ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
High Pier ◽  
Rigid Frame Bridge

The fluctuating wind field is simulated for digital by using the stationary Gauss processes, which Kaimal spectrum and Panofsky spectrum is used to the simulation of wind target spectrum with different direction and speed. According to Davenport quasi-steady buffeting force model formula, the time-history of wind velocity is converted to Buffeting force time history, which are applied to the Structure model node, combined with ANSYS for long-span continuous rigid frame bridge buffeting response analysis dynamic simulation.Taking a high pier and long span continuous rigid frame bridge as an example, analyzes dynamic buffeting response of the bridge under the action of the stochastic wind field, which as the guidance of high pier and long span continuous rigid frame bridge design work, practice has proved that the method is simple, reliable, also can be a way that dynamic analysis of buffeting response of large span bridge or tower structure under the action of stochastic wind field.

Static and Dynamic Behavior of the High-Pier and Long-Span Continuous Rigid Frame Bridge

2013 ◽  
Vol 639-640 ◽  
pp. 474-480 ◽  
Author(s):  
Jian Xin Liu ◽  
Ying Wang ◽  
Mei Chun Zhu ◽  
Zhi Hong Zhang ◽  
Xin Hua Zhang ◽  
...  
Keyword(s):  
Time History ◽  
Response Analysis ◽  
Bridge Structure ◽  
The Finite Element Method ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Internal Forces ◽  
High Pier ◽  
Rigid Frame Bridge

A structure model of three-span continuous rigid frame bridge was constructed based on the finite element method. Firstly, the static performances were obtained. Secondly, the modal analysis was performed to get the natural frequencies and periods. The dynamic characteristics of the bridge structure were summarized, and some improvement guidelines are suggested to overcome the shortcoming for the bridge structure. Then, seismic response analysis was carried out based on the EL-Centro wave. The input excitations adopted the combination of vertical wave plus longitudinal wave, or vertical wave plus lateral wave, or the combination of three directions. Based on the three excitation cases, some useful results were obtained, which include internal forces, displacements, accelerations time-history curves of the critical sections for the bridge structure. And some comments about the time-history curves are given. At last, some helpful conclusions are drawn based on the calculation and analysis above. The calculation methods and results in this paper can provide some referenced information for the engineering design.

Seismic Response Analysis of Partial Curve Long-Span Rigid Frame Bridge with Super High Pier

2011 ◽  
Vol 308-310 ◽  
pp. 1314-1321
Author(s):  
Yang Liu ◽  
Da Wang ◽  
Min Hai Chen
Keyword(s):  
Seismic Response ◽  
Seismic Performance ◽  
Great Influence ◽  
Time History ◽  
Dynamical Stability ◽  
Response Analysis ◽  
Long Span ◽  
Rigid Frame ◽  
High Pier ◽  
Rigid Frame Bridge

Based on the time history analysis method, some curve long-span rigid frame bridge with super high pier in Sichuan was taken as the studying case, and a studying of natural vibration characteristics and seismic response. Comparative study was emphasis carried on seismic performance between the partial curve bridge and the straight. In addition, the exhaustive research to about between crosswise relation to the structure overall rigidity contribution and to the structure and the seismic performance influence is conducted. The conclusion of the study shows that the seismic performance of the straight long-span rigid frame bridge with super high pier is surpassing the curve bridge. The curve linear has little influence to the base frequency of this kind of structure, and The rigidity is mainly effected by the bridge pier. If additionally builds the crosswise relation between the structure, the dynamic characteristic of the structure will be improved greatly. The height of this type bridge has great influence on the dynamical stability, the height is lower and the dynamical stability is better, which is more advantageous to the structure seismic behavior.

Finite Element Analysis about Dynamic Characteristics of the High-Pier and Long-Span Continuous Rigid Frame Bridge

2011 ◽  
Vol 243-249 ◽  
pp. 1876-1880
Author(s):  
Ying Wang ◽  
Jian Xin Liu ◽  
Chong Wang
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Time History ◽  
Response Analysis ◽  
Bridge Structure ◽  
Element Analysis ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Rigid Frame Bridge

A structure model of three-span continuous rigid frame bridge was constructed based on the finite element method. At first, the modal analysis was performed to get the natural frequencies and periods. The dynamic characteristics of the bridge structure were summarized, and some improvement measures are suggested to overcome the shortcoming for the bridge structure. Then, seismic response analysis was carried out based on the EL-Centro wave. The input excitations adopted the combination of vertical wave plus longitudinal wave, or vertical wave plus lateral wave. Based on the two excitation cases, some useful results were obtained, which include internal forces, displacements, accelerations time-history curves of the critical sections for the bridge structure. And some commentates about the time-history curves are given. At last, some helpful conclusions are drawn based on the calculation and analysis above. The calculation methods and results in this paper can provide some referenced information for the engineering design.

Seismic Vulnerability of Long-Span Continuous Rigid Frame Bridge with High Pier Based on Fiber Model and IDA Method

2011 ◽  
Vol 255-260 ◽  
pp. 2573-2578 ◽  
Author(s):  
Yin Gu ◽  
Wei Dong Zhuo ◽  
Wen Ting Zheng
Keyword(s):  
Seismic Vulnerability ◽  
Damage Index ◽  
Response Analysis ◽  
Failure Behavior ◽  
Fiber Model ◽  
Long Span ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
High Pier ◽  
Rigid Frame Bridge

The failure behavior and the vulnerable position of the rigid frame bridge are analyzed by nonlinear response analysis, based on incremental dynamic analysis (IDA). The damage index, applying for long-span continuous rigid frame bridge with high pier, is studied. The seismic vulnerability problem of the whole bridge is analyzed by fiber model. The strain was used for damage index of piers. The displacement was used for damage index of bearings. According to the studies above, the fragility curves are established based on integral performance of the bridge.

Seismic Research of Continuous Rigid Frame Bridge under Cantilever Construction Method

2011 ◽  
Vol 368-373 ◽  
pp. 673-677 ◽  
Author(s):  
Xian Yuan Tang ◽  
Qiang Hu ◽  
Yong He Yu
Keyword(s):  
Response Spectrum ◽  
Time History ◽  
Highway Bridges ◽  
Element Model ◽  
Construction Method ◽  
Response Analysis ◽  
Continuous Rigid Frame Bridge ◽  
Rigid Frame ◽  
Cantilever Construction ◽  
Rigid Frame Bridge

To research the effect of earthquakes of different magnitudes on continuous rigid frame bridge under cantilever construction method, combined with the newly promulgated seismic design rules of highway bridges in China, finite element model has been built by Midas software by using the response spectrum method and dynamic time history analysis method to analyze cantilever construction method of the various stages of seismic response analysis. The results indicate that the bending moments of root segments of cantilever beams and the bottom sections of piers change greatly. So it should be attached importance to in design.

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.

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