An experimental study on steel-encased buckling-restrained brace hysteretic dampers

Eryasar, Mehmet Emrah
Topkaya, Cem
This paper describes a seismic test program performed on 12 steel-encased buckling-restrained braces (BRBs). The use of rolled or built-up buckling-restraining mechanisms with welded or bolted attachments was examined. In addition, the effects of bolt pretension, core-to-encasing attachment details, aspect ratio of core segment and imperfections due to manufacturing on the brace response were investigated. All specimens were subjected to a stepwise incremental quasi-static testing protocol with a maximum axial strain amplitude of 2%. All specimens except one showed satisfactory performance with stable hysteretic response and sustained cumulative inelastic deformations in excess of 200 times the yield deformation. Based on the experimental results, the compression strength adjustment factor, and the strain hardening adjustment factor for each excursion were quantified. Test results revealed that these two factors are significantly influenced by the parameters investigated in the experimental program. BRB details were also found to influence the buckling and the yielding patterns of the core segment. Copyright (C) 2009 John Wiley & Sons, Ltd.


Evaluation of displacement coefficient method for seismically retrofitted buildings with various ductility capacities
Dicleli, Murat (Wiley, 2014-07-25)
This research study is aimed at evaluating the accuracy of the displacement coefficient method (DCM) of FEMA 440 and associated nonlinear static procedure (NLSP) for actual buildings with soft story mechanism and various ductility capacities. The DCM and associated NLSP are evaluated using two existing seismically vulnerable buildings with soft story mechanism. The buildings are first retrofitted using a ductile steel-brace-link system to represent those with good ductility capacity and then retrofitted wit...
A numerical study on response factors for steel wall-frame systems
Arslan, Hakan; Topkaya, Cem (Wiley, 2010-11-01)
A numerical investigation was undertaken to evaluate the response of dual structural systems that consisting of steel plate shear walls and moment-resisting frames. The primary objective of the study was to investigate the influence of elastic base shear distribution between the wall and the frame on the global system response. A total of 10 walls and 30 wall frame systems, ranging from 3 to 15 stories, were selected for numerical assessment. These systems represent cases in which the elastic base shear res...
Sucuoğlu, Haluk; McNiven, Hugh (Wiley, 1984-01-01)
The parameters appearing in the mixture and effective modulus models proposed in Part 1 are determined through optimization by matching theoretical and experimental responses. The optimization analysis is performed in frequency space. The response quantities chosen to be matched are the complex frequency response functions (experimental and theoretical) relating the Fourier transforms of top and base accelerations of the wall. Computations in optimization analysis are carried out by introducing an object (e...
Development of a new rubber seismic isolator: 'Ball Rubber Bearing (BRB)'
Özkaya, Cenan; Akyüz, Uğurhan; Caner, Alp; Dicleli, Murat; Pinarbasi, S. (Wiley, 2011-10-01)
This paper presents an experimental research aimed at developing a new rubber-based seismic isolator called 'Ball Rubber Bearing (BRB)'. The BRB is composed of a conventional steel-reinforced multi-layered rubber bearing with its central hole filled with small diameter steel balls that are used to provide energy dissipation capacity through friction. A large set of BRBs with different geometrical and material properties are manufactured and tested under reversed cyclic horizontal loading at different vertic...
Comparison of suction and oedometer methods for the measurement of swell pressure
Cokca, E (Geological Society of London, 2000-05-01)
In this paper, a thermocouple psychrometric technique is used to measure soil suction and assess the reliability of a swell pressure prediction method. Kaolinite-bentonite clay mixtures were prepared to obtain expansive soils with a wide range of plasticities. Suction measurements using thermocouple psychrometers and constant volume swell tests in oedometers were made on statically compacted :specimens. Soil suction-water content relationships were evaluated. The results indicate a linear relationship betwe...
Citation Formats
M. E. Eryasar and C. Topkaya, “An experimental study on steel-encased buckling-restrained brace hysteretic dampers,” EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, pp. 561–581, 2010, Accessed: 00, 2020. [Online]. Available: