Study of a New Type SMA Damper

2011 ◽  
Vol 250-253 ◽  
pp. 2897-2901
Author(s):  
Jie Ying Sui ◽  
Chen Ming Xu ◽  
Wen Feng Liu
Keyword(s):  
Energy Dissipation ◽  
Dynamic Analysis ◽  
Seismic Response ◽  
Time History ◽  
Seismic Vibration ◽  
Passive Energy Dissipation ◽  
New Type ◽  
Story Building

In this paper, a new type SMA damper making use of SMA wire was designed. When the damper was in a tensile, compressed or tensional condition, the SMA wire is always in the condition of tension. The passive energy dissipation control of seismic vibration makes use of the super elasticity and high damping of tensile SMA wire. On the basis of the study of a 10-story building, five groups of the placement of the damper are used in time-history dynamic analysis .By contrasting the five different results, the influencing rules of the placement of the damper on seismic response of the structure can be concluded.

Nonlinear Dynamic Analysis of the Damping Frame Structure System

2012 ◽  
Vol 594-597 ◽  
pp. 886-890 ◽  
Author(s):  
Gan Hong ◽  
Mei Li ◽  
Yi Zhen Yang
Keyword(s):  
Energy Dissipation ◽  
Seismic Response ◽  
Nonlinear Dynamic ◽  
Time History ◽  
Time History Analysis ◽  
Frame Structure ◽  
Force Model ◽  
Operating Characteristics ◽  
Restoring Force ◽  
History Analysis

Abstract. In the paper, take full account of energy dissipation operating characteristics. Interlayer shear-frame structure for the analysis of the Wilson-Θmethod ELASTOPLASTIC schedule, the design of a nonlinear dynamic time history analysis procedure. On this basis, taking into account the restoring force characteristics of the energy dissipation system, the inflection point in the restoring force model treatment, to avoid a result of the calculation results of distortion due to the iterative error. A frame structure seismic response time history analysis results show that: the framework of the energy dissipation significantly lower than the seismic response of the common framework, and its role in the earthquake when more significant.

scholarly journals Linear and Nonlinear Dynamic Analysis of Masonry Infill RC Framed Buildings

2017 ◽  
Vol 3 (10) ◽  
pp. 881 ◽  
Author(s):  
Ayman Mohammed Abd-Elhamed ◽  
Sayed Mahmoud
Keyword(s):  
Dynamic Analysis ◽  
Seismic Response ◽  
Response Spectrum ◽  
Nonlinear Dynamic Analysis ◽  
Time History ◽  
Considerable Change ◽  
Infill Walls ◽  
Masonry Infill ◽  
Soft Story ◽  
Rc Frame Buildings

This paper aimed to investigate the seismic response of reinforced concrete (RC) frame buildings under linear and non-linear dynamic analysis. Different building models as bare frame and fully masonry infill frame have been developed for performing the analysis. In order to investigate the effect of irregular distributions of masonry infill walls in elevation on the seismic response behavior, an infill frame model with soft story has also been developed. The linear response spectrum (RS) dynamic analysis and the nonlinear time-history (TH) analysis methods are employed. Moreover, the induced energies in terms of input, potential and kinetic are also obtained from the TH analysis. Moreover, the interaction between infill walls and frames leads to considerable change in the induced responses comparable with the bare model. 

Computation of Seismic Response from Higher Frequency Modes

1981 ◽  
Vol 103 (1) ◽  
pp. 16-19 ◽  
Author(s):  
K. M. Vashi
Keyword(s):  
Dynamic Analysis ◽  
Seismic Response ◽  
Static Analysis ◽  
Upper Bound ◽  
General Procedure ◽  
Time History ◽  
Response Spectra ◽  
Seismic Excitation ◽  
Earthquake Loading ◽  
Assigned Value

A general procedure is presented for a more accurate, rapid and economical computation of response from higher frequency modes, when the modal superposition time history or response spectra method is used for dynamic analysis of structures subject to uniform, translational seismic excitation. The procedure utilizes special amplification characteristics of earthquake loading for frequencies not less than a certain assigned value and certain properties of structural modal characteristics. The upper bound for the assigned value of frequency is usually 33 cycles/s. This procedure requires computation of only those frequencies that are lower than the assigned value, and other modal properties associated with these lower frequencies. For rigid structures (i.e., structures with frequencies not less than the assigned value), this procedure reduces itself down to the familiar static analysis.

Parameter Effect of Side Retainers on Seismic Response of Bridges with Flexible Rubber Bearings

2011 ◽  
Vol 255-260 ◽  
pp. 1280-1284
Author(s):  
Xiang Xu ◽  
Wei Qin Liu ◽  
Xiu Li Xu ◽  
Ding Zhou ◽  
Xue Hong Li ◽  
...  
Keyword(s):  
Seismic Response ◽  
Seismic Design ◽  
Time History ◽  
Relative Displacement ◽  
Nonlinear Time History Analysis ◽  
History Analysis ◽  
Nonlinear Contact ◽  
New Type ◽  
Rubber Bearings ◽  
Nonlinear Time History

This paper studies the parameter effect of side retainers on seismic response of bridges with flexible rubber bearings. The pounding effect between girder and side retainers is analyzed by the nonlinear time-history analysis. The pounding and sliding of bearings are simulated by the nonlinear contact elements. Comparative analysis of seismic performance of bridge with/without retainers is carried out. Furthermore, the seismic performances of ordinary retainers and new retainers are compared. Finally, the effect of side retainer parameters on seismic response of bridge is analyzed. The results indicate that the sliding of elastomeric pad bearing should be considered in seismic design. It is shown that the retainers can effectively restrain the relative displacement between girder and piers, and the new type of retainers can greatly reduce the pounding force. It is also proved that both stiffness and gap of the retainer have significant influences on the pounding force.

The Passive Energy-Dissipation Study of Braced Steel Frame Structure

2010 ◽  
Vol 163-167 ◽  
pp. 318-322
Author(s):  
Wen Xia Luo ◽  
Jin Song Lei ◽  
Ying Hu
Keyword(s):  
Energy Dissipation ◽  
Seismic Performance ◽  
Time History ◽  
Steel Frame ◽  
Frame Structure ◽  
Seismic Load ◽  
Control Force ◽  
Finite Element Software ◽  
Passive Energy Dissipation ◽  
Steel Frame Structure

The seismic performance of braced steel frame was simulated by the finite element software ANSYS based on the passive energy-dissipation under the low-cycle repeated load and the time-history analysis under seismic load for the energy-dissipation braced steel frame structure, no-brace steel frame structure, and conventional braced frame structure. The energy dissipation and seismic performance of three kinds of frame were compared, the results show that the energy-dissipation braced structure can produce strong energy-dissipation control force to enhance energy dissipation capacity of the whole structure significantly, and weaken the seismic load of the main frame. It follows that the energy-dissipation braced steel frame can achieve the purpose of energy dissipation for structure, and has good seismic performance.

scholarly journals Seismic Response and Evaluation of SDOF Self-Centering Friction Damping Braces Subjected to Several Earthquake Ground Motions

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Jong Wan Hu ◽  
Myung-Hyun Noh
Keyword(s):  
Energy Dissipation ◽  
Seismic Response ◽  
Ground Motions ◽  
Residual Deformation ◽  
Time History ◽  
Frame Structure ◽  
Friction Damping ◽  
Friction Mechanism ◽  
Earthquake Ground Motions ◽  
Concentrically Braced Frame

This paper mainly deals with seismic response and performance for self-centering friction damping braces (SFDBs) subjected to several maximum- or design-leveled earthquake ground motions. The self-centering friction damping brace members consist of core recentering components fabricated with superelastic shape memory alloy wires and energy dissipation devices achieved through shear friction mechanism. As compared to the conventional brace members for use in the steel concentrically braced frame structure, these self-centering friction damping brace members make the best use of their representative characteristics to minimize residual deformations and to withstand earthquake loads without member replacement. The configuration and response mechanism of self-centering friction damping brace systems are firstly described in this study, and then parametric investigations are conducted through nonlinear time-history analyses performed on numerical single degree-of-freedom spring models. After observing analysis results, adequate design methodologies that optimally account for recentering capability and energy dissipation according to their comparative parameters are intended to be suggested in order to take advantage of energy capacity and to minimize residual deformation simultaneously.

Seismic tests on a model shear wall with friction joints

1983 ◽  
Vol 10 (1) ◽  
pp. 52-59 ◽  
Author(s):  
P. Baktash ◽  
C. Marsh ◽  
A. Pall
Keyword(s):  
Energy Dissipation ◽  
Dynamic Analysis ◽  
Time History ◽  
Tall Buildings ◽  
Shaking Table ◽  
Earthquake Resistant Structures ◽  
Seismic Tests ◽  
Nonlinear Time History ◽  
Energy Absorbing ◽  
Slip Force

The behaviour of energy-absorbing friction joints in vertical connections was studied using a model on a shaking table. By varying the slip force in the joints it was shown that there is an optimum value that maximizes the energy dissipation and minimizes the stress for a given seismic intensity.Results given by nonlinear time history dynamic analysis are compared with values from the tests. A proposed approximate method for the calculation of the optimum slip force is given that agrees well with the other values obtained. Keywords: seismic response, tall buildings, friction joints, energy dissipation, earthquake resistant structures, model tests, dynamic analysis.

scholarly journals Investigating the Use of Natural and Artificial Records for Prediction of Seismic Response of Regular and Irregular RC Bridges Considering Displacement Directions

2021 ◽  
Vol 11 (3) ◽  
pp. 906
Author(s):  
Payam Tehrani ◽  
Denis Mitchell
Keyword(s):  
Seismic Response ◽  
Radial Displacement ◽  
Time History ◽  
Good Prediction ◽  
3D Analysis ◽  
Combination Rules ◽  
Principal Axes ◽  
Artificial Records ◽  
The Mean ◽  
Irregular Bridges

The seismic responses of continuous multi-span reinforced concrete (RC) bridges were predicted using inelastic time history analyses (ITHA) and incremental dynamic analysis (IDA). Some important issues in ITHA were studied in this research, including: the effects of using artificial and natural records on predictions of the mean seismic demands, effects of displacement directions on predictions of the mean seismic response, the use of 2D analysis with combination rules for prediction of the response obtained using 3D analysis, and prediction of the maximum radial displacement demands compared to the displacements obtained along the principal axes of the bridges. In addition, IDA was conducted and predictions were obtained at different damage states. These issues were investigated for the case of regular and irregular bridges using three different sets of natural and artificial records. The results indicated that the use of natural and artificial records typically resulted in similar predictions for the cases studied. The effect of displacement direction was important in predicting the mean seismic response. It was shown that 2D analyses with the combination rules resulted in good predictions of the radial displacement demands obtained from 3D analyses. The use of artificial records in IDA resulted in good prediction of the median collapse capacity.

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