Response analysis of curve beam bridge under high earthquake intensity

In this paper, we intended to replace the fluid-structure interaction of deep water bridge piers with acceleration-dependent forces during an earthquake. The hydrodynamic pressure on bridge pier groups under seismic excitation is studied using the finite volume method. Different seismic waves with various spectrum components are selected in order to cover frequently encountered cases. The calculated forces of these cylinders are fitted into the Morison equation, and by calculation, the drag force term is negligible, thus the effect of fluid is converted into one added mass term. The paper further calculated the dynamic response of a continuous beam bridge with pier groups in water to check the validity of our proposed method.

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Dynamic Time-History Deformation Response Analysis of Long-Span Beam Bridge Subjected to Flowing Ice

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.2830 ◽

2010 ◽

Vol 163-167 ◽

pp. 2830-2834

Author(s):

Zhi Ping Bai ◽

Xie Dong Zhang ◽

Cheng Lin Han

Keyword(s):

Yellow River ◽

Time History ◽

Response Analysis ◽

Soil Function ◽

Action Mode ◽

Deformation Response ◽

Long Span ◽

Long Span Bridge ◽

Dynamic Time ◽

Beam Bridge

Based on the pile-soil function and damper boundary condition influence by Finite Element Method, taking Bao-Shu yellow river extra long-span bridge as the project object, the deformation effect of the bridge subjected to flowing and melting ice in spring was analyzed considering dynamical action mode. The results revealed that the deformation from this kind of action is tittly small and the bridge structure is reliable and stable. Then the calculation and analysis have been put into design and construction stage.

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Seismic Response Analysis of High-Speed Railway Bridge Fabricated Round-Ended Piers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.3844 ◽

2011 ◽

Vol 243-249 ◽

pp. 3844-3847 ◽

Cited By ~ 4

Author(s):

Ling Kun Chen ◽

Li Zhong Jiang ◽

Zhi Ping Zeng ◽

Bo Fu Luo

Keyword(s):

Finite Element ◽

High Speed ◽

Strong Motion ◽

Element Model ◽

Theory Of Elasticity ◽

Response Analysis ◽

Seismic Load ◽

Railway Bridge ◽

Earthquake Intensity ◽

High Speed Railway

The responses of high-speed railway bridge subjected to seismic load were investigated by numerical simulation, the whole finite element model of the multi-span bridge simply supported bridge was set up, and natural vibration properties of structure were analyzed. According to theory of elasticity and elastic-plasticity, parametric study was conducted to assess the influences of different speeds, strong motion record, pier height and earthquake acceleration on the seismic capability of high-speed bridge subjected to different strength of the earthquake, the finite element soft ware and moment-curvature program were employed to calculate the earthquake responses of bridge. The calculation results show that, with the increase of train speed, pier height and earthquake intensity, the earthquake responses of bridge are increase in general, and the bottom of piers step into states of elastic-plasticity under high-level earthquake, elastic-plastic deformation is larger, the stirrup encryption measures should be carried out.

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Nonlinear Dynamic Response Analysis of the Braced Steel Frame with Wedge Devices

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.368-373.685 ◽

2011 ◽

Vol 368-373 ◽

pp. 685-689

Author(s):

Jin Song Lei ◽

Yin Sheng Zou ◽

Ya Li Wang ◽

Qing Ma

Keyword(s):

Plastic Deformation ◽

Dynamic Response ◽

Nonlinear Dynamic ◽

Nonlinear Dynamic Analysis ◽

Steel Frame ◽

Structural Deformation ◽

Response Analysis ◽

Lateral Stiffness ◽

Earthquake Intensity ◽

Nonlinear Dynamic Response

In order to research the nonlinear dynamic respond analysis of a new braced steel frame with wedge devices under the action of earthquake, its damping mechanism is analyzed, and the computational model is obtained. Based on the mechanism of multiple resistant lateral system, the explicit nonlinear dynamic analysis and dynamic contact algorithm are adopted to separately analyze the steel frame with no brace, with centric and eccentric brace, and with the new braced wedge block. During the analysis, in order to take the material and geometrical bi-nonlinear into account, the material model is chosen as the bilinear equivalent strength, and the explicit centered difference algorithm is adopted. It can be obtained from structural deformation and energy and so on. The results show that the stiffness of structure decays after plastic deformation in the earthquake effect, and the hysteresis energy consumption and system dumping appear. The nonlinear dynamic response of steel frame is affected by resistant lateral stiffness, plastic deformation, and system damping. The braced steel frame with wedge block regulates the displacement and acceleration response with yield energy dissipation of brace, as it provides resistance lateral stiffness to control the deformation. This kind of structure has strong adaptability to earthquake intensity and good seismic performance.

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Seismic Response Analysis for Shallow Tunnel in Different Earthquake Intensity

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.680.161 ◽

2013 ◽

Vol 680 ◽

pp. 161-165 ◽

Cited By ~ 2

Author(s):

Li Lin ◽

He Chuan ◽

Zhang Jing ◽

Geng Ping

Keyword(s):

Numerical Simulation ◽

Seismic Response ◽

Model Test ◽

Internal Force ◽

Shaking Table ◽

Response Analysis ◽

Shallow Tunnel ◽

Earthquake Intensity ◽

Study Results ◽

Table Model

Base on the large-shaking table model test，studies on the seismic response characters of shallow tunnel in different earthquake intensity are made by mainly using numerical simulation. The results indicate that there is a good agreement between the model test and numerical simulation. the different earthquake intensity has great effects on the seismic response characters, The distribution of the lining cross-section’s internal force is oval-shaped and the value which in conjugate 45° direction is greater than crown and bottom of arch. Moreover, the internal forces vary from earthquake intensity in the same direction. It is great to recognize the seismic response characters of shallow tunnels through the study results and it provides reference for the similar projects.

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Vibration Response Analysis on Deep-Water Piers under Earthquake and Wave Coupling Motivation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.548-549.1607 ◽

2014 ◽

Vol 548-549 ◽

pp. 1607-1612

Author(s):

Zi Jian Wang ◽

Li Ming Wu ◽

Sheng Xie Xiao

Keyword(s):

Hydrodynamic Pressure ◽

Internal Force ◽

Response Analysis ◽

Computing Platform ◽

Finite Element Software ◽

Continuous Beam Bridge ◽

Rigid Frame ◽

Close Relationship ◽

Beam Bridge ◽

Rigid Frame Bridge

Taking a typical cylindrical solid pier as example, this paper utilizes the way of additional mass to consider the influences of hydrodynamic pressure on piers. It establishes dynamic response comparative analysis of single pier model under different earthquakes’ motivation taking ANSYS finite element software as computing platform. This draws conclusion that hydrodynamic pressure keeps characteristics of changing the seismic response of piers in which pier top displacement and pier bottom internal force are increased. Also it acquires the conclusion that weight and cycle of structure are related to the effect of hydrodynamic pressure. Through analyzing continuous beam bridge and continuous rigid-frame bridge, it is verified that there exists close relationship between effect of hydrodynamic pressure and inherent cycle of structure in which the higher inherent cycle becomes, the lower influence hydrodynamic pressure keeps on structure.

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