scholarly journals Structural Vibration Control with the Implementation of a Tuned Mass Rocking Wall System

Buildings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 614
Author(s):  
Wei Lin ◽  
Andong Wang ◽  
Shanghong Chen ◽  
Ai Qi ◽  
Zhonggao Su
Keyword(s):  
Energy Dissipation ◽  
Time History ◽  
Deformation Mode ◽  
Frame Structure ◽  
Structural Vibration ◽  
Parameter Study ◽  
Dynamic Amplification Factor ◽  
Frame System ◽  
Host Structure ◽  
Rocking Wall

A tuned mass rocking wall (TMRW)-frame structure system is proposed to improve the energy dissipation ability of the traditional rocking wall-frame system. Based on the energy dissipation principle of the traditional tuned mass damper (TMD), a TMRW is designed with proper mass and stiffness according to the dynamic characteristic of the host structure. Firstly, considering the presence of inherent structural damping, the dynamic amplification factor of the main mass was derived from the dynamic equations of the TMRW mechanism. A practical design table was then obtained after parameter study. Secondly, by taking a six-story frame structure as an example, the dynamic time-history analysis was conducted to study TMRW’s seismic performance. The inter-story drift ratios of the TMRW-frame, the traditional rocking wall-frame, and the frame structures were compared, and the seismic responses of the controlled and uncontrolled structures were also compared. The results demonstrate that the TMRW can effectively reduce the inter-story displacement of the host structure, and the lateral deformation mode of the host structure tends to be more uniform. However, compared with the traditional rocking wall-frame system, the proposed TMRW has less ability on coordinating deformation.

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.

A Practical Design Method for Energy Dissipation Structure

2012 ◽  
Vol 204-208 ◽  
pp. 1150-1153
Author(s):  
Min Chen ◽  
Guo Jing He ◽  
Chang Liu
Keyword(s):  
Energy Dissipation ◽  
Design Method ◽  
Damping Ratio ◽  
Time History ◽  
Structure Design ◽  
Frame Structure ◽  
Seismic Region ◽  
History Analysis ◽  
Dissipation Structure ◽  
Supplemental Damping

Energy dissipation structure is favored by designers because the earthquake energy can be dissipated by the dampers, which can avoid or reduce the damage caused by earthquake. However, the energy dissipation structure design is complex and the most domestic designers can not master it easily. In this paper, a simple and practicable design method for viscous damper dissipation structure by using the PKPM design software is proposed based on a 7-storey frame structure in highly seismic region. Firstly, lower half or one degree for the design intensity to design out an uncontrolled structure. Secondly, determine the supplemental damping ratio required for the fortification intensity via modal analysis method of PKPM software, and identify the numbers of the required dampers as well as their corresponding installation positions in line with the methods in the seismic code of China. Finally, the ETABS program is adopted to conduct the time-history analysis of the designed dissipation structure, showing that the proposed method in this paper can produce a satisfied result.

Seismic design of hybrid unbonded post-tensioned precast concrete joints based on bearing capacity and energy dissipation capacity

2020 ◽  
pp. 136943322098273
Author(s):  
Baoxi Song ◽  
Weizhi Xu ◽  
Dongsheng Du ◽  
Shuguang Wang ◽  
Weiwei Li ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Bearing Capacity ◽  
Design Method ◽  
Precast Concrete ◽  
Residual Deformation ◽  
Time History ◽  
Frame Structure ◽  
Energy Dissipation Capacity ◽  
Concrete Joints ◽  
Post Tensioned

This paper provides a practical design method for hybrid unbonded post-tensioned precast concrete joints. Such joints featured with self-centering capacities have been widely favored in recent years. However, the absence of design methods hinders their further promotion. To solve the issue, two methods for calculating mechanical behavior of the joints were first studied: characteristic points method and iterative method. The effectiveness of the methods was verified by the existing test results. On this basis, a joint design method considering both yield bearing capacity and energy dissipation capacity was proposed. Moreover, to facilitate design, some factors affecting the bearing capacity were discussed. A five-story frame structure was designed by the proposed design method, and the influence of two design factors on structural response was analyzed by utilizing nonlinear time-history method. The analysis results show that: with the increase of energy dissipation factor αs, the post-earthquake residual deformation of the structure tends to increase linearly, while the accumulated damage of the structure will decrease continuously; both overdesign and underdesign of bearing capacity of the joint are unfavorable; and near-field earthquake may cause irreparable damage to structural columns, making the residual deformation of structures contrary to the self-centering capacity of joints, which shall be considered during engineering design.

Comparison of Stiffness Degradation of Special-Shaped Column and Rectangular Column Structure in Earthquake

2013 ◽  
Vol 838-841 ◽  
pp. 1492-1496
Author(s):  
Yi Ying Li ◽  
Wen Pan ◽  
Xiao Feng Zou
Keyword(s):  
Finite Element ◽  
Energy Dissipation ◽  
Base Isolation ◽  
Time History ◽  
Frame Structure ◽  
Analysis Model ◽  
Element Analysis ◽  
Finite Element Software ◽  
Column Structure ◽  
Rare Earthquake

In this paper, using the finite element software PERFORM3D to establish the finite element analysis model for isolation and seismic frame structure with special-shaped column and rectangular column frame structure, and the overall structure of the moderate and strong elastic and nonlinear earthquake time-history analysis to get the dynamic characteristics, from two aspects of the damping coefficient in horizontal direction and the energy dissipation, investigation structure in earthquake and rare earthquake of superstructure stiffness attenuation. It can be drawn only seismic resistance measures are taken, the special-shaped column structure under rare earthquake stiffness attenuation speed is greater than the rectangular column, if after using base isolation technology, although the special-shaped column stiffness attenuation rate is still greater than the rectangular column, but the two energy dissipation ability.

An Optimal Distribution Strategy for Energy Dissipation Damper

2013 ◽  
Vol 639-640 ◽  
pp. 882-885
Author(s):  
Min Chen ◽  
Guo Jing He ◽  
Chang Liu
Keyword(s):  
Energy Dissipation ◽  
Vibration Isolation ◽  
Time History ◽  
Time History Analysis ◽  
Frame Structure ◽  
Viscous Dampers ◽  
Distribution Strategy ◽  
Acceleration Time History ◽  
History Analysis ◽  
The Ideal

A certain amount of viscous dampers are installed in the 10-storey frame structure in line with different distribution strategies, and then 2 sets of strong earthquake records and 1 set of artificial acceleration time-history curve are selected to conduct the time-history analysis under both frequently and rarely earthquakes via ETABS software. Based on the comparison of the time-history analysis results in various working cases, the ideal energy dissipation results can be obtained when the dampers are installed in the lower stories with a larger storey drift, which also help to utilize the upper space of the structure. The time-history analysis shows that the viscous dampers installed in the lower part of a building have a better effectiveness of vibration isolation than those in the upper parts, and it is no necessary to install too many dampers, for the energy dissipation effects tend to be steady when the number of dampers has been increased to a level.

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.

Analysis on the Applications of Novel SMA Damper in Seismic Retrofitting of One Teaching Building

2011 ◽  
Vol 105-107 ◽  
pp. 1020-1026
Author(s):  
Yu Hong Ling ◽  
Hong Hua Ling ◽  
Jing Zhuang Wu ◽  
Chan Yuan Huangfu
Keyword(s):  
Energy Dissipation ◽  
Shear Force ◽  
Time History ◽  
Seismic Retrofitting ◽  
Frame Structure ◽  
Good Effect ◽  
Rc Frame Structure ◽  
Good Ability ◽  
History Analysis ◽  
Story Drift

According to one three-story RC frame structure, the results of time-history analysis of using re-centring SMA damper to seismic retrofitting are introduced in detail. Damping effect of dampers is studied by index such as floor displacement, story drift, story shear force, energy dissipation, etc., and optimal layout of dampers is also discussed. The analysis results indicate that floor displacement and story drift are decreased greatly after strengthening, and story shear force is controlled to some extent with good effect. The damper dissipates most of the total energy inputting into structure and also has good ability to re-centring. The damper can obtain good energy dissipation when arranged at the maximum story drift, and less energy dissipation when arranged at the smaller story drift.

scholarly journals Parametric Study on Self-centering Precast Concrete Frames with Hysteretic Dampers

2021 ◽  
Author(s):  
Yadong Li ◽  
Fangfang Geng ◽  
Youliang Ding ◽  
Libin Wang
Keyword(s):  
Energy Dissipation ◽  
Rational Design ◽  
Modular Design ◽  
Precast Concrete ◽  
Time History ◽  
Bending Moment ◽  
Frame Structure ◽  
Concrete Frame ◽  
Energy Dissipation Capacity ◽  
Hysteretic Dampers

The self-centering precast concrete frame structure combines the advantages of industrialization and low earthquake damage, and its energy dissipation capacity and seismic performance have always been the focus of research. This paper proposed a kind of self-centering precast concrete frame with hysteretic dampers (SCPCHD). Its modular design makes the energy dissipation device and components easy to repair and replace. In order to obtain the optimal design, the finite element models of SCPCHD frames with different layout types of post-tensioned (PT) tendons and different shapes of hysteretic dampers are established, and the elastoplastic dynamic time-history analyses are carried out. The results show that the layout types and vertical margin of PT tendons have little effect on the displacement response of the frame structure. Compared to linear PT tendons, polygonal PT tendons can better bear the bending moment of the beam and reduce the stress of longitudinal reinforcements in the beam. The reduce effect of shortening the vertical margin on the tensile damage of beam concrete is obvious in the frame with polygonal PT tendons, but not obvious in the frame with linear PT tendons. Rational design of the prestressing force also plays a crucial role in the energy dissipation capacity of SCPCHD frames.

scholarly journals Recentering Shape Memory Alloy Passive Damper for Structural Vibration Control

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Hui Qian ◽  
Hongnan Li ◽  
Gangbing Song ◽  
Wei Guo
Keyword(s):  
Energy Dissipation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Structural Control ◽  
Structural Response ◽  
Time History ◽  
Nonlinear Time History Analysis ◽  
Structural Vibration ◽  
Seismic Protection ◽  
Building Structures

This paper presents a preliminary study on the evaluation of an innovative energy dissipation system with shape memory alloys (SMAs) for structural seismic protection. A recentering shape memory alloy damper (RSMAD), in which superelastic nitinol wires are utilized as energy dissipation components, is proposed. Improved constitutive equations based on Graesser and Cozzarelli model are proposed for superelastic nitinol wires used in the damper. Cyclic tensile-compressive tests on the damper with various prestrain under different loading frequencies and displacement amplitudes were conducted. The results show that the hysteretic behaviors of the damper can be modified to best fit the needs for passive structural control applications by adjusting the pretension of the nitinol wires, and the damper performance is not sensitive to frequencies greater than 0.5 Hz. To assess the effectiveness of the dampers for structural seismic protection, nonlinear time history analysis on a ten-story steel frame with and without the dampers subjected to representative earthquake ground motions was performed. The simulation results indicate that superelastic SMA dampers are effective in mitigating the structural response of building structures subjected to strong earthquakes.

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