Nonlinear Seismic Response Analysis of RAC Space Frame Structure

2013 ◽  
Vol 405-408 ◽  
pp. 1046-1050
Author(s):  
Chang Qing Wang
Keyword(s):  
Seismic Response ◽  
Time History ◽  
Material Model ◽  
Element Model ◽  
Shaking Table ◽  
Frame Structure ◽  
Response Analysis ◽  
Nonlinear Seismic Response ◽  
Steel Material ◽  
Dynamic Time

An OpenSees computational platform-based 3-dimentional space RAC finite element model is established for reproducing the seismic response of a 1/4 scaled 6-story, 2-bay and 2-span RAC frame model regular in elevation that was tested on shaking table under a series of one-dimensional base excitations with gradually increasing acceleration amplitudes. The dynamic characteristic parameters of the numerical model, including natural frequencies and vibration modes are captured by performed modal analysis. The acceleration response, the maximum storey displacements and the inter-storey drifts are carefully predicted by performed dynamic time history analysis. Very satisfactory agreement between experimental and analytical results is observed. The numerical simulation verifies that the beam-column element type, the section model, the confined concrete model, the steel material model, and the numerical methods used for the proposed model are reasonable.

The Seismic Response of a 1:3 Scale Model R.C. Structure with Elastomeric Spring Dampers

1995 ◽  
Vol 11 (2) ◽  
pp. 249-267 ◽  
Author(s):  
Gokhan Pekcan ◽  
John B. Mander ◽  
Stuart S. Chen
Keyword(s):  
Reinforced Concrete ◽  
Seismic Response ◽  
Structural Response ◽  
Time History ◽  
Shaking Table ◽  
Frame Structure ◽  
Scale Model ◽  
History Analysis ◽  
Analysis Computer ◽  
Dynamic Time

In this experimental study, elastomeric spring dampers, which have a distinct re-centering characteristic, are used to retrofit a non-ductile, previously damaged 1/3 scale model reinforced concrete building frame structure which is subjected to a variety of ground motions in shaking table tests. A velocity dependent analytical model is developed and verified for the elastomeric spring dampers. This model is implemented in the widely available non-linear dynamic time history analysis computer program DRAIN-2DX to produce response predictions which are in good agreement with experimental observations. The elastomeric spring damper devices significantly attenuate the seismic response of the structure and provide a considerable amount of energy dissipation while the main non-ductile reinforced concrete structural load carrying elements remain elastic. The effect of varying the damper configuration on the structural response was also investigated.

Test Study on Seismic Performance of Cantilevered Vertical Irregular Model Frame Structure

2014 ◽  
Vol 1065-1069 ◽  
pp. 1035-1041
Author(s):  
Si Tian Chen ◽  
Jie Xu ◽  
Hong Hui Xie
Keyword(s):  
Seismic Response ◽  
Shaking Table Test ◽  
Time History ◽  
Time History Analysis ◽  
Shaking Table ◽  
Frame Structure ◽  
Scaled Model ◽  
Influence Coefficients ◽  
History Analysis ◽  
Dynamic Time

This paper is a seismic response study on a vertical irregular frame structure which has a cantilevered top floor. Aimed to analyze the features of seismic response for a vertical irregular frame and scaled model, dynamic time history analysis and shaking table test have been carried out by use of the earthquake waves recorded in WENHUAN earthquake. It shows that the results of dynamic time history analysis and shaking table test are in good agreement, and the earthquake influence coefficients obtained by dynamic time history analysis and shaking table test are larger than the value according to Code, which indicates that the results would be not secure if the simplified methods specified in Code only in the sight of the calculation of earthquake loads.

Seismic Response Analysis on Flat L-Shaped Frame Structure Based on FEM

2012 ◽  
Vol 166-169 ◽  
pp. 2138-2142
Author(s):  
Hui Min Wang ◽  
Liang Cao ◽  
Ji Yao ◽  
Zhi Liang Wang
Keyword(s):  
Seismic Response ◽  
Three Dimensional ◽  
Time History ◽  
Frame Structure ◽  
Response Analysis ◽  
Reinforced Concrete Frame ◽  
Seismic Response Analysis ◽  
Concrete Frame ◽  
History Analysis ◽  
Complex Features

For the complex features in the form of a flat L-shaped reinforced concrete frame structure, the three dimensional FEM model of the structure was established in this paper, and the dynamic characteristics of the structure was analyzed, the participation equivalent mass of every mode’s order was obtained. Seismic response analysis for the structure was carried out with modal decomposition spectrum method and time history analysis method, the weak layer of the structure was pointed out and the reference for the structural design was provided.

Study on Piping Response Under Multiple Excitation: Part 2 — Validation for Multiple Excitation Analysis of Piping

2013 ◽  
Author(s):  
Satoru Kai ◽  
Tomoyoshi Watakabe ◽  
Naoaki Kaneko ◽  
Kunihiro Tochiki ◽  
Makoto Moriizumi ◽  
...  
Keyword(s):  
Seismic Response ◽  
Seismic Design ◽  
Nuclear Power ◽  
Response Spectrum ◽  
Time History ◽  
Response Spectra ◽  
Shaking Table ◽  
Response Analysis ◽  
Multiple Time ◽  
Floor Response Spectra

The piping in a nuclear power plant is laid across multiple floors of a single building or two buildings, which are supported at many points. As the piping is excited by multiple-inputs from the supporting points during an earthquake, seismic response analysis by multiple excitations is needed to obtain the exact seismic response of the piping. However, few experiments involving such multiple excitation have been performed to verify the validity of multiple excitation analysis. Therefore, analysis of the seismic design of piping in Japan is performed by the enveloped Floor Response Spectrum (FRS), which covers all floor response spectra at all supporting points. The piping response estimated by enveloped FRS is conservative in most cases compared with the actual seismic response by multiple excitations. To perform rational seismic design and evaluation, it is important to investigate the seismic response by multiple excitations and to verify the validity of the analytical method by multiple excitation test. This paper reports the validation results of the multiple-excitation analysis of piping compared with the results of the multiple excitations shaking test using triple uni-axial shaking table and a 3-dimensional piping model (89.1mm diameter and 5.5mm thickness). Three directional moments from the analysis and the shaking test were compared on the validation. As the result, it is confirmed that the analysis by multiple time history excitation corresponds with the test result.

Nonlinear Seismic Response Analysis of Half through CFST Arch Bridge under 3-D Earthquake Waves

2010 ◽  
Vol 456 ◽  
pp. 67-76 ◽  
Author(s):  
Jun Ma ◽  
Yan Jiang Chen ◽  
Li Peng Liu
Keyword(s):  
Seismic Response ◽  
Seismic Design ◽  
Constitutive Models ◽  
Element Model ◽  
Hysteretic Behavior ◽  
Response Analysis ◽  
Nonlinear Seismic Response ◽  
Cfst Arch Bridge ◽  
3D Composite ◽  
Nonlinear Constitutive Models

A finite-element model for CFST members using a 3D composite beam fiber element is presented which accounts for the nonlinear constitutive models of steel and concrete separately. The model is proved to be valid by comparing the computational results of some test specimens with their experimental data. Using this model, a CFST arch bridge’s seismic response was calculated. The result indicated that the magnitude of displacements and moments at arch crown increases up to 10 percent caused by CFST hysteretic behavior which should be seriously considered during seismic design. Some measures and suggestions bring forward to guide the design and construction of this type of bridge.

Dynamic Response Analysis of Tailings Dam under Seismic Action

2015 ◽  
Vol 799-800 ◽  
pp. 746-750
Author(s):  
Ai Min Gong ◽  
Hai Yan Huang ◽  
Hui Ying Zhang
Keyword(s):  
Dynamic Stability ◽  
Time History ◽  
Reference Value ◽  
Element Model ◽  
Dynamic Responses ◽  
Response Analysis ◽  
Seismic Load ◽  
Seismic Action ◽  
Tailings Dam ◽  
Dynamic Time

A finite element model of tailiings dam was used to analyze the dynamic responses of the stress field, displacement and acceleration of the dam with the dynamic time-history response analysis method in this paper. The time-history curves of different responses were obtained. And an evaluation for dynamic stability of the tailings dam was also discussed. The analysis result shows that this case can provide a certain reference value for the dynamic calculation and the dynamic stability analysis of tailings dam under seismic load.

scholarly journals Simulation of the In Situ Spatially Varying Ground Motions and Nonlinear Seismic Response Analysis of the Cable-Stayed Bridge

2020 ◽  
Vol 2020 ◽  
pp. 1-19
Author(s):  
Jin Zhang ◽  
Ke-jian Chen ◽  
Neng-pan Ju ◽  
Shi-xiong Zheng ◽  
Hong-yu Jia ◽  
...  
Keyword(s):  
Seismic Response ◽  
Ground Motions ◽  
Element Model ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Nonlinear Seismic Response ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Wave Effects

To study the nonlinear seismic behavior and seismic resistance of the long-span cable-stayed bridges subjected to earthquakes, the multidimensional and multisupported artificial ground motions are synthesized first based on the in situ site conditions of the bridge considering the coherent and traveling wave effects. Then, considering the material nonlinearity of the cable-stayed bridge, a 3D finite element model is established based on the OpenSees platform, and the nonlinear seismic response analysis of the bridge is carried out under the synthetic artificial ground motions. The nonlinear seismic response of main bridge components such as piers, towers, bearings, and cables is analyzed, and key conclusions and observations are drawn.

Seismic Response Analysis of an Adsorption Tower Based on ANSYS

2010 ◽  
Vol 102-104 ◽  
pp. 150-154
Author(s):  
Xiao Ping Hu ◽  
Xiao Ping Ye
Keyword(s):  
Seismic Response ◽  
Seismic Analysis ◽  
Time History ◽  
Element Model ◽  
Response Analysis ◽  
Seismic Load ◽  
Engineering Practice ◽  
Current Standard ◽  
History Analysis ◽  
Tower Equipment

The seismic load usually has a significant hazard to the safety of the tower equipment, so it’s important to execute of seismic design in engineering practice. In this paper, the time history analysis of the seismic response is carried out with the help of ANSYS software for the finite element model of the adsorption tower. Relevant time history data is obtained. Compared with seismic analysis of the current standard method, corresponding suggestions are given.

Comparative Study on Seismic Response of Reinforced Concrete Frames with SMA in Column and Beam Plastic Hinge Zones

2014 ◽  
Vol 1043 ◽  
pp. 247-251
Author(s):  
Mohamed Omar
Keyword(s):  
Seismic Response ◽  
Plastic Hinge ◽  
Time History ◽  
Frame Structure ◽  
Great Earthquake ◽  
Concrete Frames ◽  
Concrete Frame ◽  
Steel Material ◽  
Beam Plastic Hinge ◽  
Material Nonlinear

This paper presents a comparative analytical study on seismic response of low rise three storeys concrete frame reinforced with super-elastic material as rebar elements. The super-elastic shape memory alloy rebars were used as reinforcement in two plastic hinge zones of the frame, beam plastic hinge zones and column plastic hinge zones. The response of the frame structure with two different reinforced cases is compared to response of the frame structure reinforced with regular steel material. Nonlinear dynamic time history analysis is performed in this study. Three different great earthquake ground motions were used to determine the seismic response of the frame structures in terms of frame top displacement time history and inter-storey drift along the frame height for different cases of reinforcements. Results obtained from the analysis show that the seismic response of low rise frame reinforced with super-elastic SMA rebars is affected by the zone of which SMA rebar are used in reinforcement. The SMA column reinforcement is more effective than SMA beam reinforcement in reducing the frame response.

Seismic Response Analysis of the Fault Fracture Zones with Saturated Soil under Incident SV Waves

2014 ◽  
Vol 638-640 ◽  
pp. 1863-1868
Author(s):  
Long Sheng Wang ◽  
Zi Hui Wang ◽  
Hui Kong
Keyword(s):  
Seismic Response ◽  
Time History ◽  
Surface Displacement ◽  
Saturated Soil ◽  
Response Analysis ◽  
Soil Thickness ◽  
Input Method ◽  
Fault Fracture Zone ◽  
History Of ◽  
Dynamic Time

Based on viscous-spring artificial boundary of time domain and the corresponding wave input method, the dynamic time history of fault fracture zone containing saturated soil is studied when SV waves are imported vertically into it. The change of saturated soil thickness, angle and width of the fault has influence on the site seismic response, and the influence is analyzed and discussed. Studies show that the peak value of the fault’s surface displacement decreases slightly when the fault has a dip; and the influence of the width of fault containing saturated soil on seismic response of the site is small.

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