Design of friction damped structures using lateral force procedure

Fu, Yaomin; Cherry, Sheldon

doi:10.1002/1096-9845(200007)29:7<989::aid-eqe950>3.0.co;2-7

Cited by 37 publications

(18 citation statements)

References 5 publications

(8 reference statements)

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“…Singh and Moreschi, 2001), may use a realistic complicated structural model, gradient-based optimization schemes (e.g. Singh and Moreschi, 2003) normally use simplified models that either use an equivalent single degree of freedom (Lee et al, 2008 andFu andCherry, 2000) representation or model the damper behavior with an equivalent linearized relationship (e.g. Apostolakis and Dargush, 2009).…”

Section: Optimization Schemementioning

confidence: 99%

Risk‐based optimal retrofit of a tall steel building by using friction dampers

Tafakori

Banazadeh

Jalali

et al. 2011

Structural Design Tall Build

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SUMMARY Friction dampers, whose configuration is optimized on the basis of the probabilistic seismic loss associated with a building's damage due to ground motion, were utilized in this study to optimally retrofit a 15‐story steel structure. In line with the concept of performance‐based earthquake engineering (PBEE), a decision‐making procedure based on the monetary seismic loss was incorporated for optimizing the dampers' configuration. A nonlinear numerical model was initially established for representing the structure. In this regard, a brace–damper system was modeled with the buckling of brace elements being addressed accurately and by representing the friction damper's load–displacement relationship on the basis of laboratory evidences. By monitoring the structural deformations in two different response levels, two patterns were established for the distribution of the dampers' strengths throughout the structure, and a number of retrofit alternatives were proposed subsequently. By using incremental dynamic analysis and following the PBEE methodology, the annualized loss (AL), which accounts for all potential damage states in the building and a broad range of seismic intensities, was calculated for each alternative frame. The AL is regarded as a decision variable upon which the best damper configuration is selected. Revealing conclusions were finally made regarding optimal configuration of the damper–brace system. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Optimization Schemementioning

confidence: 99%

Risk‐based optimal retrofit of a tall steel building by using friction dampers

Tafakori

Banazadeh

Jalali

et al. 2011

Structural Design Tall Build

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“…Filiatrault and Cherry have developed design procedure for equally distributed friction dampers minimizing the sum of normalized displacements and dissipated energy through parametric study on the natural period of the structure, the frequency content of an earthquake, and the slip load of the friction damper [8]. Fu and Cherry proposed a design procedure of the friction dampers using a force normalization coefficient [9]. Lee et al proposed the seismic design methodology of the friction dampers based on the story shear force distribution of a building structure [10].…”

Section: Introductionmentioning

confidence: 99%

Development of a Multiaction Hybrid Damper for Passive Energy Dissipation

Roh

Hur

Choi³

et al. 2018

Shock and Vibration

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A multiaction hybrid damper (MHD) is designed to have independent hysteretic characteristics under small and large loading conditions, and its control performance for building structures excited by wind or earthquake load is verified. The MHD is composed of steel elements, two friction pads, and two lead rubber bearings (LRBs). Because the friction pads and the LRBs are in series connection, only the LRBs deform before the friction pad slippage occurs. After the friction slippage, the damper deformation concentrates on the friction pads. The initial stiffness and hysteresis are dependent on the properties of the LRB, and the maximum force is determined by the friction pad. Accordingly, the load-deformation behaviors before/after the friction slippage can be independently designed to show optimal performance for a building structure subject to wind and earthquake loads. The cyclic loading tests of a full scale MHD were conducted to evaluate the multiaction behaviors and energy dissipation capacity of the MHD. The control performance of the MHD damper is analytically investigated by using a 20-story steel structure subject to wind loads and a 15-story RC structure excited by earthquake loads. The MHD damper showed good performance for reducing both the linear wind-induced and nonlinear earthquake-induced responses.

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“…A large amount of research has been concerned with development of these innovative earthquake resistant systems. In many studies involving parametric analyses [Choi et al 2003;Phocas and Pocanschi 2003;Whittaker et al 2003a;2003b;Wu and Ou 2003;Lin and Chopra 2002;Goel 2000;Singh and Moreschi 2001;Pekcan and Chen 1999;Shukla and Datta 1999;Fu and Kasai 1998] and design procedures [Park and Min 2004;Moreschi and Singh 2003;Singh and Moreschi 2002;Garcia 2001;Levy et al 2000;Fu and Cherry 2000;Yamada 2000;Takewaki 1999;Gluck et al 1997;Ciampi 1993;Filiatrault and Cherry 1990], the structure, equipped with braces and dampers, is modeled as a simple mechanical system. This approach leads to a significant reduction of the complexity of the problem that has to be solved for evaluating the response of the system, but at the same time it leads to approximations, in some cases not acceptable, in the assessment of the behavior of the actual system.…”

Section: Introductionmentioning

confidence: 99%

Design criteria for added dampers and supporting braces

Lomiento

Bonessio

Braga

2010

SIAPS

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The papers deals with the use of dissipative braces as retrofit solutions for existing moment resisting frame buildings. Braces are widely used in order to enhance performances of existing buildings under seismic loads, by adding stiffness and strength against inertial forces induced by earthquake ground motions. The braces can be equipped with supplemental dissipators in order to increase the overall energy dissipation capacity of the system and reduce stresses in the existing structures. In the present work, general design criteria for dampers and supporting braces are given and a simple design procedure based on the actual mechanical interaction between dampers and braces has been carried out. A number of design procedures have been proposed for dissipative bracing systems in frame structures. The procedures are often based on simplifying assumptions, due to the complexity of mechanical behavior of systems equipped with dissipative braces. Those assumptions make the procedures easier to use, but at the same time, less reliable in predicting the behavior of complex structures. In the present work, results are obtained without using two of the most common simplifying assumptions that neglect interaction between frame and braces: the use of the floor stiffness in order to characterize the frame behavior, and the use of equivalent systems with a single degree of freedom. The proposed design procedure has been tested on a moment resisting frame building and appears feasible for implementation on real structures.

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Design of friction damped structures using lateral force procedure

Cited by 37 publications

References 5 publications

Risk‐based optimal retrofit of a tall steel building by using friction dampers

Risk‐based optimal retrofit of a tall steel building by using friction dampers

Development of a Multiaction Hybrid Damper for Passive Energy Dissipation

Design criteria for added dampers and supporting braces

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